Nadic anhydride surface modified calcium carbonate filler

Abstract

The invention relates to calcium carbonate fillers and particularly relates to a nadic anhydride surface modified calcium carbonate filler. Modified calcium carbonate is prepared from the following raw materials in parts by weight: 200 parts of calcium carbonate, 1-2 parts of sorbitan aliphatic ester, 1-2 parts of silver nitrate, 5-6 parts of alums, 1-2 parts of silicon dioxide, 1-2 parts of calcium alginate, 3-4 parts of nano clay, 1-2 parts of nadic anhydride and 4-5 parts of an auxiliary agent. The modified calcium carbonate powder is obtained by carrying out modification treatment on the calcium carbonate raw materials including the nadic anhydride, the sorbitan aliphatic ester and the like; the performance indexes including oil absorption values, viscosity, the activating rate and the like of the obtained modified calcium carbonate powder are improved; the nadic anhydride surface modified calcium carbonate filler can be easily dispersed and dissolved in high-molecular polymers and the mechanical property of a PVC (Polyvinyl Chloride) material can be effectively improved; the toughening and reinforcing effects are realized.

Description

technical field [0001] The invention relates to a calcium carbonate filler, in particular to a calcium carbonate filler modified on the surface of Nadic acid anhydride. 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 pe...

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