Polymethyl methacrylate-nano cerium oxide coating modification calcium carbonate powder and preparing method thereof

Abstract

The invention discloses polymethyl methacrylate-nano cerium oxide coating modification calcium carbonate powder. The preparing method includes the steps that titanate coupling agent / ethanol solution wet method ball grinding pretreatment is carried out on calcium carbonate to improve dispersity and surface reactivity, calcium carbonate powder obtained after pre-modification is mixed with nano cerium oxide and methyl methacrylate monomers to react, a polymethyl methacrylate / nano cerium oxide composite membrane layer is generated on the surface through in-situ polymerization, modified calcium carbonate powder has good compatibility with a resin matrix, unique characteristics are endowed to the powder by rare earth oxide, tenacity, thermal ageing resistance, light ageing resistance and electromagnetic radiation resistance of plastic can be improved, and added value is effectively increased.

Description

technical field

[0001] The invention relates to the technical field of inorganic powder surface modification, in particular to polymethyl methacrylate-nanometer cerium oxide coated calcium carbonate powder and a preparation method thereof. Background technique

[0002] Calcium carbonate is a very common inorganic powder filler. It has the advantages of low price, non-toxic and tasteless, high whiteness and good hardness. It is widely used in rubber products, papermaking, ink, plastics, coatings and other fields. However, , calcium carbonate is essentially an inorganic mineral, which has poor affinity and compatibility with organic substances. Direct filling will lead to serious deterioration of product performance and severely limited scope of use. Therefore, calcium carbonate powder needs to be adjusted in practical applications. Carry out modification.

[0003] At present, the main modification methods include mechanical refinement, surface modifiers such as coupling agen...