Dedicated to magnesium hydroxide / aluminium hydroxide
organophosphorus coupling super-dispersantCore additive that targets flame-retardant efficiency · HALOGEN-FREE SYNERGIST
Developed mainly for magnesium hydroxide and aluminium hydroxide halogen-free flame-retardant materials — it effectively improves dispersion and compatibility, enhances the tensile strength of the resin, and helps the halogen-free flame-retardant system upgrade across the board.
- 🔥 UL94 improved by 1 grade (to V-0)
- 🧪 Flame-retardant utilisation +30% or more
- 📉 Peak heat release −20~30%
- 🌿 Halogen-free · phosphorus-hydroxide synergy
- Active content
- ≥ 0 %
- pH value (weakly alkaline)
- 0 – 0
- Heat resistance
- ≥ 0 ℃ stable
- Interfacial tension reduction (PP)
- ≥ 0 %
Quantified flame-retardant improvement (measured comparison)
At 2% R200: switch the burn rig to see how V-2 and V-0 end differently.
Core flame-retardant synergy mechanism · three-layer shield
Phosphorus-metal hydroxide synergy: click a temperature zone to light up the corresponding protective layer.
The organophosphorus decomposes to form a phosphate char layer — blocking heat transfer.
Magnesium hydroxide / aluminium hydroxide dehydrate and absorb heat — lowering the matrix temperature.
Metal oxides combine with the char layer to form a barrier — suppressing the release of combustible gases.
5μm → <1μm · contact area ×3
The organophosphorus groups form covalent bonds with the hydroxide surface, dispersing the agglomerated particles (average particle size reduced from 5μm to below 1μm) into nanoscale units, so the contact area between the flame retardant and the matrix expands by more than 3 times and heat-absorption cooling during combustion improves markedly.
Three-layer shield · relay along the temperature gradient
200–300℃ phosphorus forms char and blocks heat → 300–450℃ hydroxide dehydrates and absorbs heat → metal oxide × char layer forms a composite barrier and suppresses gas release — a three-layer relay; the ≥200℃ heat resistance of R200 forms a temperature-gradient synergy with the hydroxide decomposition temperature.
Technical specification and its relevance to flame retardancy
Every parameter maps to a cause-and-effect chain in flame-retardant efficiency.
| Item | Specification | Effect on flame-retardant efficiency |
|---|---|---|
| Active content | ≥ 98% | High purity maximises coupling and dispersion efficiency |
| Heat resistance | Works stably above 200℃ | Forms a temperature-gradient synergy with the hydroxide decomposition temperature (300–450℃) |
| Interfacial tension reduction | ≥ 40% (with the PP matrix) | Improves wetting of the flame retardant and reduces flame-retardant dead zones caused by agglomeration |
| Melt viscosity reduction | 15–20% (60% filler system) | Allows a higher filler loading (up to 60%), so flame-retardant dosage can increase by 20% |
| pH value | 7.5 – 8.0 | Weakly alkaline, maintaining the chemical stability of the system |
| Appearance | Yellow viscous liquid | Easy to mix and coat evenly |
Application scenarios and optimal process solutions
Measured results in three typical systems + two process disciplines.
PP + 2% + 60% Mg(OH)₂
The part reaches UL94 V-0 (1.5mm) while the heat deflection temperature rises by 10℃.
V-0 @1.5mmHDT +10℃PE based · LOI 24% → 30%
Meets the automotive FMVSS 302 flame-retardant standard (burn rate ≤ 100mm/min).
FMVSS 302≤100mm/minPVC · V-1 → V-0
The vertical burning grade is raised and smoke density drops by 15% (GB/T 8323.2 test).
Smoke density −15%GB/T 8323.2① Pre-treatment process
Pre-treat this product with the hydroxide at a 1:50 ratio in a high-speed mixer; the filler surface coverage reaches over 95% and the dispersion uniformity of the flame retardant improves by 40%.
1 : 501200 rpm15 minCoverage ≥95%② Blend temperature control (PP based)
A processing temperature of 180–200℃ is recommended; avoid high temperatures (>220℃), which decompose the organophosphorus component and impair the synergistic flame-retardant effect.
Usage · packaging · sample request
Submit the form on the right and a technical adviser will contact you within 24 hours and arrange the sample.
Precise dosage
When the filler specific surface area is >20m²/g, increasing to 3% is advised.
Dual interfacial modification · masterbatch filling
During filler pre-treatment, 3% silane coupling agent can be added to form an "organophosphorus-silane" dual interfacial modification, further improving the bonding between the flame retardant and the matrix.
When preparing the masterbatch, the filler content is best kept at 60–70%.
⚠ Filling >80% → poorer encapsulation · lower flame-retardant efficiencyBasic specification
01Product positioning
R200 belongs to the "Coupling Hyperdispersant" category (English category name: Coupling Hyperdispersant), official full name "Organophosphorus coupling hyperdispersant R200 for magnesium hydroxide / aluminum hydroxide"; series affiliation: hyperdispersant series (the official series description states "R200, the dedicated coupling hyperdispersant for magnesium hydroxide / aluminum hydroxide, is also in this series"). Manual technical data page title, verbatim: "Organophosphorus coupling hyperdispersant R200 dedicated to magnesium hydroxide / aluminum hydroxide"; catalog line, verbatim: "R200: organophosphorus coupling hyperdispersant for magnesium hydroxide / aluminum hydroxide"; official positioning line: "hydroxide surface coupling, chemical dispersion system"; official mechanism field: "organophosphorus coupling + hydroxide chemical dispersion". (Data source: product handbook / official product data)
[Product Overview] verbatim: "R200 is an organophosphorus coupling hyperdispersant developed primarily for magnesium hydroxide and aluminum hydroxide halogen-free flame-retardant materials, to improve the flame-retardant efficiency of magnesium hydroxide and aluminum hydroxide, enhance the dispersibility and compatibility of magnesium hydroxide and aluminum hydroxide, and strengthen the plasticizing property of the resin (raising the tensile strength of the resin). R200 is a core additive that targetedly improves flame-retardant efficiency, helping upgrade the performance of magnesium hydroxide and aluminum hydroxide halogen-free flame-retardant systems." (Data source: product handbook / official product data)
Official application field (four items): "magnesium hydroxide filling / aluminum hydroxide filling / flame-retardant masterbatch / PE flame retardancy"; application domains are assigned to two domains: inorganic powder domain (noted "magnesium hydroxide filling / aluminum hydroxide filling / flame-retardant masterbatch") and flame-retardant safety domain (noted "hydroxide system"). (Data source: official product data)
This product is an additive (processing orientation), with three main components: "organophosphorus, hydroxyl, and lipid compounds"; only the components are listed, and the structural formulas, content ratios, and role assignments of each component are not given — not inferred on the product's behalf. (Data source: product handbook / official product data)
- Flame-retardant synergy — "only a 1-3% dosage is needed to raise the flame-retardant rating of the composite by 1-2 levels and increase the oxygen index by 4-8 percentage points" (statement in the conclusion section).
- Dispersion and coupling — "organophosphorus groups form covalent bonds with the hydroxide surface," dispersing agglomerated particles into nanoscale units.
- Three-layer protection — organophosphorus phosphoric acid char layer (200-300℃) + hydroxide dehydration heat absorption (300-450℃) + metal oxide and char layer composite barrier.
- Processing improvement — interfacial tension reduction rate ≥40% (with PP matrix); melt viscosity reduction 15-20% (60% filler system).
- Low dosage — 1-3% of the hydroxide filler mass, with 2% recommended.
- Pre-use note — blending temperature is recommended at 180-200℃; avoid high temperatures (>220℃) that cause decomposition of the organophosphorus component; a small-scale trial is recommended before batching.
02Formulation system & mechanism of action
Mechanism 1 · Dispersion and coupling synergy (verbatim): "organophosphorus groups form covalent bonds with the hydroxide surface, dispersing agglomerated particles (average particle size reduced from 5 μm to below 1 μm) into nanoscale units, expanding the contact area between the flame retardant and the matrix by more than 3 times, and significantly improving the heat-absorption cooling efficiency during combustion." (Data source: product handbook / official product data)
Mechanism 2 · Phosphorus and metal hydroxide synergistic flame retardancy ("three-layer protection," verbatim essence): ① organophosphorus decomposes to form a phosphoric acid char layer (200-300℃), blocking heat transfer; ② magnesium hydroxide / aluminum hydroxide dehydrates and absorbs heat (300-450℃), lowering the matrix temperature; ③ metal oxide and char layer combine to form a barrier layer, suppressing the release of combustible gases. (Data source: product handbook / official product data)
Conclusion section (verbatim essence and quoted sentence): "This product, through the triple mechanism of 'uniform dispersion - strong interfacial coupling - phosphorus-aluminum-magnesium synergy,' fundamentally solves the efficiency loss caused by agglomeration of inorganic flame retardants. Measured data show that only a 1-3% dosage is needed to raise the flame-retardant rating of the composite by 1-2 levels and increase the oxygen index by 4-8 percentage points." Data boundary: the specific chemical structure of the organophosphorus, the role assignments of the hydroxyl / lipid compounds, the quantitative description of active-phase dispersion, and third-party test conclusions — none are given on this grade's page; not inferred or assumed. (Data source: product handbook / official product data)
- Dispersion — particle size refinement"dispersing agglomerated particles (average particle size reduced from 5 μm to below 1 μm) into nanoscale units" — contact area expanded by more than 3 times.
- Coupling — strong interfacial bonding"organophosphorus groups form covalent bonds with the hydroxide surface"; interfacial tension reduction rate ≥40% (with PP matrix).
- Synergistic flame retardancy — three-layer protectionPhosphoric acid char layer (200-300℃) → dehydration heat absorption (300-450℃) → metal oxide + char layer composite barrier, suppressing the release of combustible gases.
- Processing improvement — viscosity reduction and filler increasemelt viscosity reduction 15-20% (60% filler system); "flame retardant dosage can be increased by 20%" (allowing a higher filler loading (up to 60%)).
03Key parameters
The entries recorded in the handbook specification table and the official product data are reproduced verbatim below (content / temperature resistance / interfacial tension / melt viscosity / pH / appearance); the values in the table are as recorded in the source materials, and small-scale testing is recommended before use.
| Item | Value / description |
|---|---|
| Main component | Organophosphorus, hydroxyl, and lipid compounds |
| Applicable systems | Magnesium hydroxide / aluminum hydroxide / flame retardant masterbatch |
| Appearance | Yellow viscous liquid |
| Main component | Organophosphorus, hydroxyl, and lipid compounds |
| Active ingredient content | ≥98% (high purity ensures maximum coupling and dispersion efficiency) |
| Temperature resistance | Stable performance above 200℃ (forms a temperature-gradient synergy with the 300-450℃ decomposition temperature of the hydroxide) |
| Interfacial tension reduction rate | ≥40% (with PP matrix) |
| Melt viscosity reduction | 15-20% (60% filler system); allows a higher filler loading (up to 60%), and the flame retardant dosage can be increased by 20% |
| pH value | 7.5-8.0 |
| Packaging · Shelf life | PE plastic drum · 25 kg/drum; 24 months from the date of manufacture (official detail-page layer; the handbook's page for this grade does not contain these two items) |
| Density · Storage conditions · Safety data (MSDS-type) | Not stated in the source materials — no same-system values are substituted |
Reading notes: ① Packaging and shelf life appear only at the official detail-page layer, and the handbook's page for this grade does not contain these two items — recorded by layer; ② density, storage conditions, handling-protection entries, and safety data are not stated in the source materials; ③ the values in the table are as recorded in the source materials, and small-scale testing is recommended before use. (Data source: product handbook / official product data)
04Recommended dosage window
Handbook [How to use and ensuring flame-retardant efficiency], "Precise dosage" verbatim: "Add 1-3% of the mass of the hydroxide filler, with 2% recommended (when the filler's specific surface area is >20m²/g, increasing to 3% is recommended)." The official dosage field uses the same basis: "1-3% (relative to hydroxide)". Denominator = mass of the hydroxide filler (stated in the source materials).
| Scenario | Dosage | Conditions & notes |
|---|---|---|
| Magnesium hydroxide / aluminum hydroxide flame-retardant system | 1-3% (2% recommended) | The handbook and the official field use the same basis; denominator = mass of the hydroxide filler; "when the filler's specific surface area is >20m²/g, increasing to 3% is recommended" |
The denominator is the mass of the hydroxide filler (stated in the source materials) — it cannot be converted to or from other denominators such as "the final plastic product", and dosage bases are not copied between other grades in the same series. This grade has no "thickness-dosage" directional clause (the thickness figures such as 0.8mm and 1.5mm appearing in the body text are flame-retardant test / application conditions, not dosage-thickness directional clauses). Graded breakdowns and upper-limit verification are not provided in the source materials (only the overall range, the recommended value, and the specific-surface-area add-on condition).
To be verified: ① dosage grading details and upper-limit verification — the source materials give only the overall range 1-3%, the recommended 2%, and the specific-surface-area add-on condition; ② the test methods, standards, and reports corresponding to the flame-retardant tests (LOI / UL94 / heat release / utilization rate) — not attached in the source materials; ③ the above are values as recorded in the source materials; for actual production, please run small-scale tests with your own hydroxide and matrix to confirm.
05Applications
The official application field is "magnesium hydroxide filling / aluminum hydroxide filling / flame-retardant masterbatch / PE flame retardant"; the handbook gives three typical applications and process key points, reproduced verbatim below.
- Electrical and electronic enclosures (typical application)
- "Adding 2% of this product to a PP flame-retardant system, together with 60% magnesium hydroxide, enables the article to reach UL94 V-0 rating (1.5mm), while the heat deflection temperature increases by 10℃".
- Automotive interior parts (typical application)
- "After using this product in a PE-based composite, the oxygen index increases from 24% to 30%, meeting the automotive industry FMVSS 302 flame-retardant standard (burning rate ≤100mm/min)".
- Cable insulation layer (typical application)
- "After adding this product to a PVC system, the vertical burning rating improves from V-1 to V-0, and the smoke density decreases by 15% (GB/T 8323.2 test)".
- Pretreatment process (handbook verbatim)
- "Pretreat this product with the hydroxide at a 1:50 ratio in a high-speed mixer (1200rpm, 15 minutes); this can achieve a filler surface coating rate of over 95%, and improve the dispersion uniformity of the flame retardant by 40%"; the detail-page layer records "coverage rate" — the two wordings coexist, cited by layer.
- Blending and masterbatch (handbook verbatim essentials)
- For the PP matrix, a processing temperature of 180-200℃ is recommended, avoiding high temperatures (>220℃) that cause decomposition of the organophosphorus component; when preparing masterbatch, it is recommended to keep the filler content at 60-70% (>80% may affect the coating effect of the dispersant); during filler pretreatment, 3% silane coupling agent can be used together to form an "organophosphorus-silane" dual interfacial modification.
- Application domain assignment
- Inorganic powder domain (magnesium hydroxide filling / aluminum hydroxide filling / flame-retardant masterbatch) + flame-retardant safety domain (hydroxide system) — reproduced verbatim per the official layer.
Field issues & application examples (as recorded in the source material)
| Field issue | What the source material states |
|---|---|
| How much can the flame-retardant performance improve with it added? | Quantitative comparison ("without dispersant" vs "with 2% R200 added"): oxygen index (LOI) 24-26% → 28-32%; peak heat release rate 350-400 W/g → 280-320 W/g (a reduction of 20%~30%); UL94 vertical burning rating V-2 → V-0 (0.8mm thickness); effective utilization rate of the flame retardant 60-70% → over 90% (an increase of over 30%). The table data are cited as recorded in the source materials. |
| How much to add? What is the denominator? | Add 1-3% of the hydroxide filler mass, with 2% recommended; when the filler's specific surface area is >20m²/g, increasing to 3% is recommended. The denominator is the hydroxide filler mass, and it cannot be converted to or from other denominator bases. |
| What should be noted in the process? | ① Pretreatment: with the hydroxide at 1:50 in a high-speed mixer at 1200rpm for 15 minutes; ② blending temperature 180-200℃, avoiding >220℃; ③ 3% silane coupling agent can be used together for dual interfacial modification; ④ masterbatch preparation filler content 60-70%, avoiding >80%. |
| What is its relationship with the R1800 series (color masterbatch hyperdispersant)? | They belong to the same hyperdispersant series, but serve different targets: the R1800 series serves pigment systems (color masterbatch, coatings and inks); R200 serves hydroxide flame-retardant systems (dispersion + coupling + flame-retardant synergism). The category fields and dosage denominators differ, so values are not copied between them and bases are not applied across them. |
06How it differs from related grades
Four axes distinguishing R200 from the same-series R1800 line (S / SK / SH): category field, target served, dosage denominator, dedicated experimental subject — same series, different substrate targets, not to be conflated. The comparison follows:
| Dimension | R200 | R1800-S / SK / SH (same-series comparison) |
|---|---|---|
| Category field | Coupling hyperdispersant (Coupling Hyperdispersant) | Hyperdispersant (Hyperdispersant) |
| Main components · Appearance | Organophosphorus, hydroxyl, and lipid compounds / yellow viscous liquid | Polyolefin ether polymers / blue paste |
| Target served | Magnesium hydroxide / aluminum hydroxide (flame-retardant filling; including flame-retardant masterbatch, PE flame retardancy) | Pigment systems: color / white (titanium dioxide) / black (carbon black) — color masterbatch, coatings and inks |
| Key mechanism | Organophosphorus coupling + chemical dispersion of hydroxides; phosphorus-hydroxide synergistic flame retardancy | Chemical dispersion (anchoring groups + solvating chains; SK additionally has ester-based anti-yellowing, SH additionally has silicon-based coupling) |
| Dosage and denominator | 1-3% of the mass of hydroxide filler (2% recommended) | 0.5%—1% of the final plastic product (same basis for all three types) |
| Process temperature | Compounding 180-200℃; avoid >220℃ | Surface treatment experimental conditions 70℃ / 80℃, etc. (recorded on each type's dedicated page) |
Reading notes: ① Same series ≠ same use (stable pigment dispersion / dispersion + coupling + synergy for hydroxide flame-retardant systems); ② Dosages are not interchangeable (different denominators, no basis for conversion); ③ Compliance narratives are not used interchangeably — the R1800 line does not involve flame-retardant systems or halogen topics; R200 serves halogen-free flame-retardant systems, but this product's own halogen status is treated as "not applicable" and neither compliance term is written; ④ With the flame retardant side and the masterbatch side: no correspondence established in the materials — do not infer, do not link. (Data source: product handbook / official product data)
07Usage & storage
The following points are taken item by item from the recorded materials; items not listed in the materials are not drafted.
Addition amount (denominator stated)
- Add at 1-3% of the mass of hydroxide filler, 2% recommended (when the filler's specific surface area is >20m²/g, increasing to 3% is suggested).
- Denominator = mass of hydroxide filler; not mutually convertible with other denominator bases.
Process points
- Pretreatment: pretreat with the hydroxide at 1:50 in a high-speed mixer (1200rpm, 15 minutes); the filler surface coating rate reaches above 95% and dispersion uniformity improves by 40%.
- Compounding temperature: 180-200℃ recommended for PP matrix; avoid high temperatures (>220℃) that cause decomposition of the organophosphorus components.
- Dual interfacial modification: can be combined with 3% silane coupling agent to form "organophosphorus-silane" dual interfacial modification.
- Masterbatch preparation: filler content is recommended to be controlled at 60-70%; excessive filling (>80%) may affect the dispersant's coating effect.
Packaging and shelf life
- Packaging: PE plastic drum · 25kg/drum.
- Shelf life: 24 months from the date of production. (Both items above appear at the official detail page level.)
Not recorded in the materials (not written on this page)
- Storage conditions, density, handling protection items, safety data (MSDS type) — not recorded/not listed in the materials; flame-retardant test methods and reports (LOI / UL94 / heat release / utilization rate) — not attached in the materials; please request the technical documents accompanying the goods according to the specific material number.
08FAQ
What product is R200?
A coupling hyperdispersant — for magnesium hydroxide and aluminum hydroxide flame-retardant materials: improves flame-retardant efficiency, improves dispersion and compatibility, and enhances the resin's plasticizing property (increases tensile strength); "it is the core additive that targetedly improves flame-retardant efficiency".
By what mechanism does it improve flame retardancy?
Two: ① Dispersion and coupling synergy — organophosphorus groups form covalent bonds with the hydroxide surface, and agglomerated particles (average particle size reduced from 5μm to below 1μm) are dispersed into nanoscale units, expanding the contact area by more than 3 times; ② Phosphorus and metal hydroxide synergy of "three-layer protection" — phosphoric acid char layer (200-300℃) / dehydration heat absorption (300-450℃) / metal oxide and char layer composite barrier.
How much to add?
Add at 1-3% of the mass of hydroxide filler, 2% recommended; when the filler's specific surface area is >20m²/g, increasing to 3% is suggested.
Are there comparison data?
Yes: before and after adding 2% R200 — LOI 24-26% → 28-32%; peak heat release rate 350-400 W/g → 280-320 W/g; UL94 V-2 → V-0 (0.8mm thickness); effective utilization rate of the flame retardant 60-70% → above 90%. All are values recorded in the materials.
Can it be used in highly filled systems?
The materials record a melt viscosity reduction of 15-20% (60% filler system), "allowing a higher filler loading (up to 60%)"; for masterbatch preparation, filler content is recommended to be controlled at 60-70%, and excessive filling (>80%) may affect the dispersant's coating effect. The two "filler content" bases coexist; recorded as in the materials.
What are the packaging and storage conditions?
Packaging: PE plastic drum · 25kg/drum; shelf life 24 months from the date of production (both items appear at the official detail page level). Storage conditions not recorded in the materials — not drafted on this page. (Data source: product handbook / official product data)
AppendixData sources
The data on this page come from two types of materials, each item traceable:
- Product handbook: the full technical data pages for this grade (main components / overview / mechanism and quantitative comparison table / technical indicators and flame-retardant correlation table / conclusion paragraph / usage method and flame-retardant efficiency assurance / typical applications).
- Official product data: all fields for this grade (name, category, positioning, description, mechanism, application, parameters, main components, dosage); hyperdispersant series entries and application domain data; official detail page copy.
Not covered by the source material (not written on this page — to be added later)
- The specific chemical structures, content ratios, and role division of the organophosphorus, hydroxyl, and lipid compounds — not given in the materials.
- Quantification of compatibility (with each PP / PE / PVC matrix, and compounding rules with other additives) — details not listed on this grade's page.
- Detailed dosage tiers and upper-limit verification — the materials only give the overall range 1-3%, the 2% recommendation, and the specific surface area addition condition.
- Flame-retardant test methods and reports (test standards and institutions for LOI / UL94 / heat release / utilization rate) — not attached in the materials.
- Storage conditions, safety data (MSDS type), handling protection items — not recorded/not listed in the materials.
- Packaging (PE plastic drum · 25kg/drum) and shelf life (24 months) appear only at the official detail page level — subject to the technical documents accompanying the goods and written confirmation from the product side.
- The two "filler content" bases coexist (up to 60% / masterbatch preparation 60-70%, >80% unfavorable) — presented side by side, pending the product side's explanation of the differences in applicable scenarios.
- The two usages "coating rate / coverage rate" coexist — recorded as per each level, not unified on our own.