Polyurethane specular putty coating and preparation method thereof

Abstract

The invention provides a polyurethane specular putty paint which comprises an A component and a B component, wherein the mass ratio of the A component to the B component is (8:1)-(4:1); the A component is prepared from the following raw materials in percentage by weight: 30-30% of polyester resin, 0.2-0.4% of wetting dispersant, 0.6-0.8% of defoamer, 1-2% of anti-settling agent, 20-30% of talcum powder, 17-27% of activated calcium carbonate, 5-10% of barite powder and 6-10% of titanium dioxide; and the B component is a diphenylmethane diisocyanate curing agent. The invention also provides a polyurethane specular putty paint preparation method which is high in production efficiency. The polyurethane specular putty paint has the characteristics of high gloss, mellow state, excellent coating property, good polishing property, strong adhesive force, good flexibility, low cost and small toxicity; and the workability is excellent, the defects on the surface of a substrate or a coating after the paint is coated can be effectively repaired and then the service life of the substrate can be prolonged, so that the polyurethane specular putty paint can be widely applied to the hole filling, repairing and coating of surfaces of engineering machinery such as glass fiber reinforced plastics, steels and the like.

Description

technical field

[0001] The invention relates to the technical field of coatings, in particular to a solvent-free, two-component polyurethane high-gloss putty coating. Background technique

[0002] Putty is a kind of thick paste paint, which is applied on the primer or directly on the object to remove uneven defects on the surface of the object to be coated, to enhance the protection life of the object to be coated, and to enhance the coating effect.

[0003] Polyurethane putty is one of the common putties in putty. It is generally made of polyester polyol, acrylic or alkyd resin as the base material, and is formulated with a large amount of filler and an appropriate amount of coloring pigment. Polyurethane putty has attracted much attention because of its good physical and mechanical properties and chemical corrosion resistance. At present, in the coating industry at home and abroad, the amount of polyurethane putty accounts for 30% of the total amount of putty, and it is s...

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