Californium Curium R200 Magnesium Hydroxide/Aluminium Hydroxide Flame-Retardant Aid: Measured Comparison and Usage

R200 is an organophosphorus coupling-type hyperdispersant developed by Californium Curium for halogen-free flame retardant materials based on magnesium hydroxide and aluminium hydroxide, and belongs to the hyperdispersant series (Based on official product data). Its role is clear: it improves the flame retardant efficiency of magnesium hydroxide and aluminium hydroxide and improves their dispersibility and compatibility. Appearance: yellow viscous liquid; main components: organophosphorus, hydroxyl and ester compounds. The core of this page is a measured data comparison table—control figures without addition and with 2% addition, reproduced line by line.

halogen-free flame retardant

1Model Positioning and One-Page Overview

1

The document’s definition of R200 is reproduced verbatim below:

R200 is an organophosphorus coupling-type hyperdispersant developed mainly for halogen-free flame retardant materials based on magnesium hydroxide and aluminium hydroxide, to improve the flame retardant efficiency of magnesium hydroxide and aluminium hydroxide, improve the dispersibility and compatibility of magnesium hydroxide and aluminium hydroxide, and enhance the plasticising effect of the resin (increasing the tensile strength of the resin). R200 is the core additive for targeted improvement of flame retardant efficiency, helping upgrade the performance of halogen-free magnesium hydroxide/aluminium hydroxide flame retardant systems.

(Based on official product data)

Item	Content	Source
Full name	Magnesium hydroxide/aluminium hydroxide special organophosphorus coupling-type hyperdispersant R200	Same as above
Series	Hyperdispersant Series	Official product data
Main components	Organophosphorus, hydroxyl, ester compounds	Official product data
Appearance	Yellow viscous liquid	Same as above
pH value	7.5–8.0	Same as above
Active content	≥98%	Same as above
Dosage	1–3% based on hydroxide filler mass; 2% recommended	Official product data

whether a dispersant has been added

2Why It Matters: The Bottleneck of Hydroxide Flame Retardancy Is Not “How Much Is Added”, but “Utilisation”

Magnesium hydroxide and aluminium hydroxide are endothermic halogen-free flame retardants, acting by dehydration, heat absorption and temperature reduction. Their problem is precisely here: the dosage is high (in the document’s scenarios, at the 60% level). Under high loading, once particles agglomerate, the contact area between the flame retardant and the matrix shrinks—the document quantifies this in one line: without dispersant, the effective utilisation rate of the flame retardant is 60–70%, and after adding 2% R200 it is above 90%. (Based on official product data)

improves the wetting of the flame retardant and reduces flame-retardant dead zones caused by agglomeration

tested by a certain institution

3Measured Data Comparison: Before and After Adding 2% R200

X-axis = dimension %; colored band = target interval where the object can fall; points outside the band = portions that cannot be reached.

1832.7547.562.2577%Target band204060Peak heat release …20–30%Effective utilisa…60–70%X-axis same dimension % ·X-axis scale based on this article's max (20–70 %); do not directly compare lengths across articles.

• Target band
• Peak heat release …
• Effective utilisa…
• X-axis same dimension % ·
• X-axis scale based on this article's max (20–70 %); do not directly compare lengths across articles.

• Peak heat release …20–30 %
• Effective utilisat…60–70 %

Chart data (source text verbatim)

Object	Range
Peak heat release rate	20–30 %
Effective utilisation rate of the flame retardant	60–70 %

Source textScale 18–77 %

Each segment's width = proportion of that component, totaling exactly 100%; segment color shading = hierarchy (main agent / auxiliary agent / carrier).

20%60%20%viscosity reduction 15-Synergist · 20%er filler loading (up toMain · 60%sage can be increased bySynergist · 20%Fig. Melt viscosity reduction formulation hierarchyTotal 100.0% — Classification by share: Main ≥25% · Synergist 8~25% · Additive <8%

• viscosity reduction 15-
• Synergist · 20%
• er filler loading (up to
• Main · 60%
• sage can be increased by
• Synergist · 20%
• Fig. Melt viscosity reduction formulation hierarchy
• Total 100.0% — Classification by share: Main ≥25% · Synergist 8~25% · Additive <8%

• viscosity reductio…20 %
• er filler loading …60 %
• sage can be increa…20 %

Chart data (source text verbatim)

Component	Share
viscosity reduction 15-	20%
er filler loading (up to	60%
sage can be increased by	20%

Technical data sheet for modelScale 0–100 %

The table below reproduces all 4 rows from the document’s [Quantified Improvement in Flame Retardant Performance (Measured Data Comparison)] subsection, verbatim (including the original percentage signs and unit notation):

(Based on official product data)

Effect on flame retardant efficiency

(Based on official product data)

interfacial tension reduction ≥40% (with PP matrix)

4Mechanism: Covalent-Bond Coupling + Particle Size 5μm→1μm + Three-Layer Protection

Moved from the bodyQuantitative results of three typical scenarios · full table

Item	Specification parameter	Effect on flame retardant efficiency (from the official materials)
Active content	≥98%	High purity ensures maximum coupling and dispersion efficiency
Heat resistance	Stable and effective at 200℃ and above	Forms a temperature-gradient synergy with the hydroxide decomposition temperature (300-450℃)
Interfacial tension reduction	≥40% (with 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 higher filler loading (up to 60%); flame retardant dosage can be increased by 20%
pH value	7.5-8.0	—
Appearance	Yellow viscous liquid	—

The document divides the action of R200 into two points, reproduced verbatim:

Dispersion and coupling synergy: organophosphorus groups form covalent bonds with the hydroxide surface, dispersing agglomerated particles (average particle size reduced from 5μm to below 1μm) into nanoscale units, expanding the contact area between the flame retardant and the matrix by more than 3 times, and significantly improving the endothermic cooling efficiency during combustion.

Phosphorus and metal hydroxide synergistic flame retardancy: during combustion, “three-layer protection” is achieved simultaneously: ▶ the organophosphorus component decomposes to form a phosphoric acid char layer (200-300℃), blocking heat transfer; ▶ magnesium hydroxide/aluminium hydroxide dehydrates and absorbs heat (300-450℃), lowering the matrix temperature; ▶ metal oxides combine with the char layer to form a barrier layer, suppressing the release of combustible gases.

(Based on official product data)

The term “covalent bond” is the dividing line between this route and ordinary encapsulation-type dispersants: it does not merely separate the particles; it allows organophosphorus groups to bond directly to the hydroxide surface, truly pulling the flame retardant into the stress-bearing and heat-transfer network of the matrix. The document also offers a temperature-gradient synergy reading: R200 withstands temperatures above 200℃, while hydroxide dehydration and heat absorption occur at 300–450℃—the additive remains stable at processing temperatures and gives way to the flame retardant at combustion temperatures. (Based on official product data)

5How to Use: Pre-Treatment, Compounding Temperature, Dosage, and Masterbatch Filler Loading

2

The processing recommendations given in the document are reproduced item by item below (this is a process window that can be copied directly):

Process step	Original text	Source
Pre-treatment process	“Pre-treat this product with hydroxide at a 1:50 ratio in a high-speed mixer (1200rpm, 15 minutes); this can achieve a filler surface coating coverage of more than 95% and improve the dispersion uniformity of the flame retardant by 40%.”	Official product data
Compounding temperature control	“The recommended processing temperature for PP matrix is 180-200℃; avoid high temperatures (>220℃) that may cause decomposition of the organophosphorus component and affect the synergistic flame retardant effect.”	Same as above
Precise dosage	“Add at 1-3% of the hydroxide filler mass; 2% is recommended (when the filler specific surface area is >20m²/g, it is recommended to increase to 3%).”	Same as above
Masterbatch filler loading	“During masterbatch preparation, it is recommended to control the filler content at 60-70%; excessively high loading (>80%) may affect the dispersant coating effect and cause a decline in flame retardant efficiency.”	Same as above
Synergist combination	“During filler pre-treatment, 3% silane coupling agent may be added to form an ‘organophosphorus-silane’ dual interfacial modification, further improving the bonding between the flame retardant and the matrix.”	Same as above

Feeding method and equipment adaptation: R200 is a yellow viscous liquid. The document does not give liquid metering/pumping methods or screw configuration recommendations (this item is not listed in the document); the available service path is given in Section 9 (Based on official product data).

6Quantitative results for three typical scenarios

What to do if V-0 cannot be passed

Scenario	Verbatim result in the document	Source
Electrical & electronics enclosure	“Adding 2% of this product to a PP flame retardant system, together with 60% magnesium hydroxide, enables the finished article to achieve UL94 V-0 rating (1.5mm), while raising the heat deflection temperature by 10℃.”	Official product data
Automotive interior part	“After using this product in a PE-based composite, the limiting oxygen index increases from 24% to 30%, meeting the automotive industry FMVSS 302 flame retardant standard (burning rate ≤100mm/min).”	Same as above
Cable insulation	“After adding this product to a PVC system, the vertical burn rating improves from V-1 to V-0, and smoke density is reduced by 15% (GB/T 8323.2 test).”	Same as above

(Based on official product data)

Two things to know when reading these three figures: ① The V-0 ratings in the examples refer respectively to 1.5mm (electrical enclosure) and an unspecified thickness (cable)—these are not the same specimen preparation conditions as the 0.8mm table in Section 3; ② the three examples do not state customer names, production line conditions or batch numbers (this website’s editorial position does not publish customer names or certification numbers), nor do they include third-party test report numbers. To reproduce the results in your resin system, you need to conduct your own small-scale trials and specimen preparation verification.

7How to combine with adjacent models/additives

In hydroxide flame retardant systems, R200 is not the only additive. The documented points where it can be directly combined are as follows:

Your need	Matching product	Documented facts	Source
Surface activation/pre-dispersion of hydroxide powder first	R100A Multi-functional Filler Activator	“Combines four functions—coupling agent, grinding aid, dispersant and encapsulating agent—in one”; “activation rate above 98%, can significantly reduce oil absorption value”; recommended addition ratio “3‰ to 10‰ (generally calcium carbonate 3‰-7‰, talc 8‰-10‰, barium sulphate 5‰-7‰, titanium dioxide 3‰-5‰)”; application field: inorganic mineral powders (calcium carbonate, talc, barium sulphate, titanium dioxide, etc.)	Official product data
Lower formulation cost / reduce antimony trioxide use	R218 Environmentally Friendly Synergistic Flame Retardant	Environmentally friendly phosphorus-silicon flame retardant, white crystalline powder, odourless and non-toxic; “in PP/PE flame retardant systems it can replace 50% to 70% of antimony trioxide at a 1:1 ratio”; “in PVC flame retardant systems it can replace 100% of antimony trioxide”; in halogen-free systems it works with phosphorus-based and intumescent flame retardants to provide rapid char formation, oxygen barrier and smoke suppression	Official product data
Direct purchase of finished flame retardant masterbatch (PP halogen-free V0)	M933 Flame Retardant Masterbatch	“Compounded from a phosphorus-based flame retardant and a small amount of synergist, subjected to surface encapsulation treatment, and pelletised after thorough mixing with the PP carrier”; halogen-free, melamine-free, no sulphate residue; reference dosage 15-25%; “in PP sheet with a thickness of 0.4mm, when 25 parts of this product are added, the drips do not ignite the cotton”	Official product data
How to position when wax/EBS-type wetting dispersants are also present in the formulation	TPS (alkyl acid ester) wetting dispersant	“Its wetting and lubricating properties are superior to polyethylene wax (PE wax); wetting is significantly superior to EBS (ethylene bis-stearamide); lubricity is comparable to EBS but without the exudation problem of EBS”; “particularly suitable for matte finish masterbatches, can replace polyethylene wax”; “not recommended for high-gloss masterbatches”	Official product data

dispersing performance / lubricating performance

The original wording of the [Conclusion] paragraph in the document (verbatim):

Redefining the efficiency boundary of hydroxide flame retardants. Through the triple mechanism of “dispersion homogenisation – strong interfacial coupling – phosphorus-aluminium-magnesium synergy”, this product fundamentally solves the efficiency loss caused by agglomeration of inorganic flame retardants. Measured data show that an addition level of only 1-3% can raise the flame retardant rating of the composite by 1-2 grades and increase the limiting oxygen index (LOI) by 4-8 percentage points, making it a core additive for achieving high performance in halogen-free flame retardant systems.

(Based on official product data)

8Frequently Asked Questions (FAQ)

Q2: How should the processing temperature be controlled? A: For PP matrix, 180–200℃ is recommended; avoid >220℃ (high temperature may cause decomposition of the organophosphorus component). R200 itself remains stable and effective above 200℃. (Based on official product data)

This product is pre-treated with the hydroxide at a 1:50 ratio in a high-speed mixer (1200rpm, 15 minutes).

excessive filler loading (>80%) may affect the dispersant encapsulation effect and reduce flame retardant efficiency.

Q5: Can the amount of antimony trioxide be reduced? A: This is not the role of R200, but of R218: in PP/PE systems it can replace 50%–70% of antimony trioxide at a 1:1 ratio, and in PVC systems it can replace 100%. (Based on official product data)

tested by a certain institution

Q7: How is the liquid added? Is it difficult to feed? A: The document does not give liquid metering/pumping methods (this item is not listed in the document). The pre-treatment process described in the document is itself a route in which the additive is first coated onto the powder and then enters the screw (Q3); actual production-line adaptation should be confirmed with the technical side.

Q8: Is it only suitable for PP? A: The scenarios in the document cover three matrices: PP (electrical & electronics enclosures), PE (automotive interior parts) and PVC (cable insulation); the specification table also indicates the interfacial tension condition “with PP matrix” and the melt viscosity condition “60% filler system”—the stated conditions cannot be extrapolated; other matrices should first be tested in small-scale trials.

9Obtaining technical documentation and samples

Californium Curium Address: Room 109-110, Building 2, No. 42, Mulun Chuangye 1st Road, Changping Town, Dongguan City, Guangdong Province, China Tel: +86 136 3650 0188 E-mail: kj9896@126.com

Provide hyperdispersants suitable for the customer’s extrusion production equipment based on the equipment

Product technical data are laboratory/trial typical values; please conduct small-scale trials before mass production. Hydroxide mesh, surface treatment method, resin matrix and equipment shear conditions will all affect the final result, and must be determined by re-testing on the production line.

For the data scope and source labelling method used on this website, see the data source notes on the product page. The public documentation on this website contains no certification numbers or third-party test report numbers; if such documents are needed, please request them from the technical side.

10Data and Basis Notes

All parameters and descriptions in this article come from official product data; items not listed in the official materials are annotated individually in the article. This article contains no prices, customer names, certificate numbers or performance commitments; the publicly available materials on this site contain no third-party test-report numbers — for such documents, please contact the technical team.