Flame-retardant zinc stearate modified calcium carbonate filler

Abstract

The invention relates to a calcium carbonate filler, and particularly relates to a flame-retardant zinc stearate modified calcium carbonate filler. The modified calcium carbonate is prepared from the following raw materials in parts by weight: 200 parts of calcium carbonate, 1-2 parts of shell powder, 8-10 parts of aluminium hydroxide, 2-3 parts of zinc stearate, 1-2 parts of sodium borate, 2-3 parts of ammonium molybdate, 3-4 parts of chromium oxide, 1-2 parts of morpholine, 23-25 parts of triethyl citrate, 1-2 parts of hexamethylphosphoric triamide, 1-2 parts of anti-aging agent NBC and 4-5 parts of assistant. Modification treatment is carried out on calcium carbonate by adopting the raw materials such as zinc stearate, morpholine and the like; the performance indexes such as oil absorption value, viscosity, activating rate and the like of the modified calcium carbonate powder are improved, which indicates that the modified calcium carbonate filler is more easily dispersed and compatible in a medium. Compared with the material filled by unmodified calcium carbonate, the mechanical property of a polyvinyl chloride (PVC) material filled by the modified calcium carbonate filler disclosed by the invention is obviously improved, the flame-retardant and fire-resistant grades are also improved, and good toughening and reinforcing effects are achieved.

Description

technical field [0001] The invention relates to a calcium carbonate filler, in particular to a flame-retardant zinc stearate modified calcium carbonate filler. Background technique [0002] Calcium carbonate is an important class of functional inorganic fillers. It has the advantages of low price, abundant reserves, stable performance, easy processing, and non-toxicity. It can significantly improve the processing performance and physical properties of materials and reduce production costs. It is widely used In the fields of plastics, rubber, coatings, papermaking, etc., because calcium carbonate is a hydrophilic compound, there are defects such as insufficient compatibility with polymers and poor dispersion in practical applications, and satisfactory filling and reinforcing effects cannot be achieved. Therefore, Calcium carbonate needs to be modified to improve its dispersion and compatibility in various materials, so as to achieve the effect of improving product performance...

AI Technical Summary

Problems solved by technology

[0002] Calcium carbonate is an important class of functional inorganic fillers. It has the advantages of low price, abundant reserves, stable performance, easy processing, and non-toxicity. It can significantly improve the processing performance and physical properties of materials and reduce production costs. It is widely used In the fields of plastics, rubber, coatings, papermaking, etc., because calcium carbonate is a hydrophilic compound, there are defects such as insufficient compatibility with polymers and poor dispersion in practical applications, and satisfactory filling and reinforcing effects cannot be achieved. Therefore, Calcium carbonate needs to be modified to improve its dispersion and compatibility in various materials, so as to achieve the effect of improving product performance