R900

Name and positioning. The data page is titled 'Composite-type dispersant R900'; the product catalog line records 'R900: rubber and plastics hyperdispersant, calcium carbonate, talc powder, kaolin filled masterbatch, etc.'. Main component 'polyolefin ether', mechanism field 'chemical dispersion'. (Data source: product handbook / official product data)

Overview (original text quoted): 'R900 is a dispersant developed by our company specifically for ultrafine powders. It is a polymer aqueous solution produced under high-temperature and high-pressure conditions using precise proportions. It has excellent molecular weight and a quite narrow molecular weight distribution, and has a very good dispersing effect on powders.' (Data source: product handbook)

Tier relationship. The series section records: 'R900 hyperdispersant is a medium-to-high-grade product made according to market demand for ultrafine powders, mainly formed by high-temperature and high-pressure copolymerization of polyolefin ether monomers, and its dispersion performance and lubricating effect are both lower than those of R1800-S.' — that is, compared with the flagship three models (R1800 series), it belongs to a different tier. (Data source: product handbook)

Problem to be solved (original text quoted): 'R900 dispersant is a water-soluble high-efficiency dispersant; it has low dosage and good effects on various powders. For example, when producing ultrafine calcium carbonate or talc powder, organic pigment powder, and other powders, often the finer the powder, the more prone it is to agglomeration, seriously affecting product quality. ... The reason is that the finer the powder, the more easily it agglomerates, and the finer the powder, the higher the dosage of dispersant that needs to be added. However, the higher the dosage of dispersant added, the more easily it cakes during production. For this reason, our company specifically developed R900 to solve this problem.' (Data source: product handbook)

• Composite composition: composed of two major parts, a dispersant and a coating agent; when the slurry is dried and encounters high temperature, the coating agent melts to wet, lubricate, and encapsulate the powder, achieving a dispersion activation effect; or it is used directly for granulation of inorganic filler mineral powder.
• Applicable powders: titanium dioxide, lithopone, heavy calcium carbonate, light calcium carbonate, talc powder, kaolin, and other common inorganic pigments; it also has considerable dispersing effect on phthalocyanine-based organic pigments.
• Dispersing and grinding aid: the data records that 'in water-milled calcium carbonate, adding R900 dispersant during slurry grinding has a dispersing and grinding-aid effect'.
• This grade is a historically listed grade (Discontinued), and the data is retained; this page is compiled from the historical data as-is.

Composition and form. The handbook's 'Main component' records 'polyolefin ether'; the overview records it as a polymer aqueous solution produced under high-temperature and high-pressure conditions. The specific polymerization structure and formulation are not provided in the data and are not inferred. (Data source: product handbook)

Composite pathway. The data records that R900 is 'composed of two major parts, a dispersant and a coating agent': the dispersant is responsible for dispersing the ultrafine powder, and the coating agent melts when the slurry is dried and encounters high temperature, wetting, lubricating, and encapsulating the powder, thereby achieving dispersion activation. (Data source: product handbook)

Effect chain. It provides a solution to the field contradiction between agglomeration of ultrafine powders and 'the higher the dosage, the more prone to caking'; in addition to dispersion, it also serves as a grinding aid (in the water-milled calcium carbonate scenario) and for coating activation. (Data source: product handbook)

1. Dispersion — water-soluble polymer aqueous solutionExcellent molecular weight and a quite narrow molecular weight distribution, with a very good dispersing effect on powders; low dosage and good effects on various powders.
2. Coating — high-temperature melting and encapsulationComposed of two parts, a dispersant and a coating agent; when the slurry is dried and encounters high temperature, the coating agent melts to wet, lubricate, and encapsulate the powder.
3. Stabilization — dispersion activationAchieves a dispersion activation effect; or is used directly for granulation of inorganic filler mineral powder.

The table below summarizes the principal components and key parameters of this product; the values in the table retain the original notation and units from the documentation.

The entry for this grade does not list prohibited items or specialized tests; items not recorded in the documentation do not appear in this table. For the dosage basis, see Section 4. (Data source: product handbook / official product data)

The documentation gives a range for the recommended addition of this product and notes the determining factors:

Value selection basis: total powder weight and fineness—the adjustment basis given in the documentation; the specific value within the range is determined by small-scale trials according to powder fineness and processing system. This entry is the single range in the documentation; no denominator is inferred, and no cross-grade conversion is performed.

This entry is the only dosage record for this grade in the documentation; the denominator is explicitly stated (total powder weight), and the determining factors are fineness and system conditions. (Data source: product handbook)

The applications and usage points listed in the documentation are as follows:

Filler direction

Calcium carbonate, talc, and kaolin filler masterbatch (catalog line in the documentation).

Ultrafine powder dispersion

Common inorganic pigments such as titanium dioxide, lithopone, heavy calcium carbonate, light calcium carbonate, talc, and kaolin; it also has a considerable dispersing effect on phthalocyanine-based organic pigments.

Water-ground calcium carbonate

When added during slurry grinding, it has a dispersing and grinding-aid effect; during slurry drying, at high temperature the coating agent melts and wets, lubricates, and encapsulates the powder, achieving a dispersion-activation effect.

Mineral powder granulation

Or directly used for granulation of inorganic filler mineral powder.

R900 belongs to the filler and ultrafine powder grade. In the materials, the positioning and dosage denominators of same-family and neighboring models differ; select according to system and target. The comparison is as follows:

Reading note: The comparison only explains each one's documented positioning and applicable targets; the four models' dosage denominators differ (total powder weight and fineness / final plastic product / based on powder weight), and values cannot be applied interchangeably. (Data source: product handbook / official product data)

The following key points are taken item by item from the materials; items not listed in the materials are not drafted on their behalf.

The data on this page come from product materials and are traceable item by item:

• Product handbook: R900 entry (overview / main components / physicochemical properties / product advantages / application fields / addition content / packaging / storage conditions); series selection and tier comparison sentences; same-series comparison paragraphs (R1800-S, R900A, R101A, etc. entries).
• Cross-verification of materials: excerpts of the same model entry are consistent across three materials: the handbook, the ultrafine powder series volume, and the content-edited version (single source family, three-volume mutual corroboration).

Not covered by the source material (not written on this page — to be added later)

• Physicochemical value records: the parameter table and the material entry each carry one version of the physicochemical record; this page does not merge the two versions or make a selection; for specific values, refer to the technical documents supplied with the goods.
• Prohibited items and usage precautions: not listed in this model's entry (prohibited items of adjacent models on the same page do not represent this model and have not been transplanted).
• Shelf life, compliance certification statements, and safety operating data (MSDS level): not recorded in the available materials.
• Special experiments and scenario-specific dosage tiering: not provided in the materials.

R900 is listed as a discontinued grade; the documentation is retained. This page is compiled from historical source material and is not a recommendation of a currently supplied product; please base your selection on current production grades and the latest documentation.