Waterborne polyurethane art paint and preparation method thereof

Abstract

The invention discloses a water-based polyurethane art paint for painting and a preparation method thereof, which comprises the following components in parts by weight: 30-50 parts of water-based polyurethane emulsion, 5-20 parts of modified ethylene oxide polyurethane emulsion, Pigment powder is 5-35 parts, calcium carbonate is 10-30 parts, sodium benzoate is 0.2-0.5 parts, distilled water is 10-30 parts, first stir the water-based polyurethane emulsion, and add modified epoxy resin to the water-based polyurethane emulsion while stirring. Ethane polyurethane emulsion is made into ointment-like adhesive substrate; then sodium benzoate is dissolved in distilled water, and the aqueous solution of sodium benzoate is used to moisten pigment powder and calcium carbonate, and stirred to make a pigment wet material; finally the ointment-like adhesive substrate After mixing with the wet material of the pigment, it is ground to make a finished product of water-based polyurethane art pigment. The art paint of the invention not only has the advantages of convenient use, strong adhesion, stable color, simple blending, etc., but also has the excellent weather resistance and flexibility of the painting film without hot stickiness, cold brittleness.

Description

technical field [0001] The invention discloses a water-based polyurethane art pigment for painting, and also discloses a preparation method of the water-based polyurethane art pigment. Background technique [0002] In the prior art, among the previous art pigments, the art pigments belonging to the water-based series include gouache, watercolor and acrylic pigments, among which acrylic pigments (art pigments with acrylate copolymer emulsion as the base material) are easy to use and have strong adhesion. It is widely used because of its advantages of , color stability, etc. At the same time, the brush stroke effect and color depth can be easily adjusted after mixing with water or dilute glue solution. However, acrylic paint also has obvious defects. When using acrylic paint to paint, the dry picture is prone to be sticky and easily contaminated with dust when the temperature is high in summer, and brittle and easily damaged when the temperature is low in winter. The performa...

AI Technical Summary

Problems solved by technology

However, acrylic paint also has obvious defects. When using acrylic paint for painting, the dry picture is prone to stickiness when the temperature is high in summer, easy to be contaminated with dust, and brittle and easy to damage when the temperature is low in winter.

The performance of acrylate copolymer emulsion has led to such defects in the art paint using it as the base material. The structure of acrylate copolymer is generally a chain linear structure, which is a thermoplastic material and is extremely sensitive to temperature. The formed pigment film cannot withstand Climate changes in winter and summer, prone to hot sticky cold brittle phenomenon

After the painter finishes drying the painting, it may be damaged due to the hot stickiness and brittleness of the picture when saving and assembling the frame. Especially for the artwork drawn by the artist, such defects cannot be tolerated