Acrylic acid polymer emulsion for industrial protective finish paint and production process thereof

Abstract

The invention relates to acrylic acid polymer emulsion for industrial protective finish paint, and belongs to the technical field of acrylic acid polymer emulsion. The acrylic acid polymer emulsion is prepared from an emulsion polymer A with the particle size being 5 to 25nm and an emulsion polymer B with the particle size being 95 to 105nm through being metered in percentage by weight, wherein the emulsion polymer A is prepared from the following ingredients in parts by weight: 100 to 250 parts of methyl methacrylate, 30 to 100 parts of styrene, 30 to 60 parts of n-butyl acrylate, 50 to 150 parts of 2-ethylhexyl acrylate, 5 to 20 parts of crosslinking monomers, 3 to 8 parts of methacrylic acid, 460 to 640 parts of water, 18 to 35 parts of reactive anion emulsifiers containing EO chain segments, 2.3 to 4.9 parts of persulfate, 2 to 8 parts of octanol, 0.5 to 3 parts of antifoaming agents and 0.8 to 2 parts of sterilization agents; the emulsion polymer B is of a core shell emulsion structure and is prepared from the following ingredients in parts by weight: 395 to 495 parts of water, 1 to 3 parts of reactive anion emulsifiers containing EO chain segments, 1 to 2.6 parts of persulfate, 335 to 761 parts of shell layer pre-emulsion, 345 to 834 parts of core layer pre-emulsion, 1 to 3 parts of sterilization agents and 1 to 3 parts of antifoaming agents. The invention also discloses a production process of the emulsion. The emulsion does not contain APEO (alkylphenol ethoxylates); the production stability is high.

Description

technical field [0001] The invention belongs to the technical field of acrylic polymer emulsions, and relates to self-drying acrylic emulsions, in particular to an acrylic polymer emulsion for industrial protective topcoats. The acrylic polymer emulsion for the industrial protective topcoat of the present invention does not contain APEO, has low formaldehyde, no benzene series and other pollution emissions, and has good product stability. In terms of key performance, compared with major competitors at home and abroad, it has high hardness, high gloss, and good impact resistance. The final product has excellent performance and is environmentally friendly. Background technique [0002] The solvent-based coatings currently used have an annual volatilization of about 800,000 tons of organic solvents, and the waste of resources is about 3 billion yuan, which not only brings huge environmental hazards, but also wastes a lot of resources. With the continuous improvement of people'...

AI Technical Summary

Problems solved by technology

The general traditional acrylic paint has low hardness, low fullness and poor decorative effect, so it can only be used for general building exterior wall paint

However, if it is used on outdoor steel structure materials, it will easily become sticky in hot summer, the hardness is not high enough, the gloss is low, and the decorative effect is not good. Due to limitations in process conditions, additives, etc., there are generally disadvantages such as soft paint film, low impact resistance, and low gloss.

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