Silane coupling agent/hydroxystearic acid surface modified calcium carbonate filler

Abstract

The invention relates to a calcium carbonate filler, and particularly relates to a silane coupling agent / hydroxystearic acid surface modified calcium carbonate filler which is prepared from the following raw materials in parts by weight: 200 parts of calcium carbonate, 1-2 parts of silane coupling agent KH-550, 1-2 parts of aluminum hydroxide, 2-3 parts of apatite, 1-2 parts of dilauryl thiodipropionate, 2-3 parts of zinc oxide, 1-2 parts of hydroxystearic acid and 4-5 parts of assistant. According to the modified calcium carbonate powder body provided by the invention, calcium carbonate is modified by adopting surface treating agents such as the saline coupling agent and the hydroxystearic acid, performances such as oil absorption value, viscosity, and activating rate are improved, thus the modified calcium carbonate powder body is more easily dispersed and compatible in a high-molecular polymer. The modified calcium carbonate powder body prepared by adopting the silane coupling agent / hydroxystearic acid surface modified calcium carbonate filler is capable of effectively improving the mechanical property of a PVC (polyvinyl chloride) material, and achieves a better filling reinforcing effect.

Description

technical field [0001] The invention relates to a calcium carbonate filler, in particular to a silane coupling agent / hydroxystearic acid surface-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...

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