Anti-aging modified calcium carbonate for paint-latex paint and preparation method thereof

Abstract

The invention provides an anti-aging modified calcium carbonate for a paint-latex paint. The modified calcium carbonate is prepared from the following raw materials in parts by weight: 95-100 parts of 800-mesh ground calcium carbonate, 1-3 parts of polyoxyethylene oleate, 0.5-0.8 part of polyethylene wax, 1-2 parts of styrene, 0.3-0.5 part of aluminum nitride powder, 1-3 parts of triphenyl phosphite, 0.2-0.4 part of aziridine crosslinking agent XR-100, 0.1-0.3 part of polyvinyl alcohol, 2-3 parts of silane coupling agent KH550, 0.3-0.5 part of styrene-acrylic emulsion, 2-3 parts of emulsifier OP-10, 0.4-0.6 part of aluminum oxide, 1-2 parts of nano silicon dioxide (VK-SP30), 1-2 parts of epoxy soybean oil, 0.5-0.6 part of ammonium polyphosphate and 0.8-1.2 parts of zinc powder. The preparation method comprises the following steps: drying calcium carbonate, proportionally and sequentially adding the other raw materials in batches, thoroughly mixing in a high-speed stirrer, drying and grinding. The modified calcium carbonate provided by the invention has the advantages of favorable dispersity and favorable wear resistance, and can lower the cost and enhance the workability of the paint when being used in paint materials; and the paint film has high glossiness.

Description

technical field [0001] The invention relates to the field of inorganic fillers, in particular to a modified calcium carbonate for anti-aging paint-emulsion paint and a preparation method thereof. Background technique [0002] Ground calcium carbonate is a commonly used inorganic filler. It is widely used in rubber, plastics, coatings and other fields due to its wide source and low price. However, the surface of heavy calcium carbonate is hydrophilic and oleophobic, the specific surface area is large, the surface energy is high, and the particles are easily agglomerated. When directly or in large quantities filled in organic matrix materials, it is not only difficult to disperse evenly, but also has a weak binding force with the matrix. , leading to two-phase interface defects and some performance degradation of composite materials. Therefore, in order to broaden its application field, it is necessary to modify the surface of heavy calcium carbonate to make its surface lipop...

AI Technical Summary

Problems solved by technology

However, the surface of heavy calcium carbonate is hydrophilic and oleophobic, the specific surface area is large, the surface energy is high, and the particles are easily agglomerated. When directly or in large quantities filled in organic matrix materials, it is not only difficult to disperse evenly, but also has a weak binding force with the matrix. , resulting in defects at the two-phase interface and some performance degradation of the composite

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