Sulfonic acid type waterborne polyurethane-acrylate self extinction resin and preparation method and application thereof

Abstract

The invention discloses a sulfonic acid type waterborne polyurethane-acrylate self extinction resin, the resin is prepared through the reaction of the components of A, prepolymer of diisocyanate sealing side, B, a component of the prepolymer dissolving and diluting the diisocyanate sealing side, C, small molecule amine chain extender, and D, radical initiator. The resin combines the excellent properties of polyurethane and acrylic acid, can achieve excellent adhesion force on the base materials of ABS, PC, PVC, PET and the like, and can achieve excellent hand sweat resistant property, and through adding a cross-linking agent the resin can achieve the excellent properties of alcohol rub resistance, and solvent resistance and the like, the resin can be applied in the fields of leather finish, wood plastic, paper printing, printing ink, printing coating, packaging coating, and matt nail polish and the like.

Description

technical field [0001] The invention relates to a sulfonic acid type water-based polyurethane-acrylate self-delustering resin and a preparation method and application thereof, belonging to the field of acrylate-modified water-based polyurethane resin. Background technique [0002] With the development of economy and the improvement of people's aesthetic concept, surface decoration products not only require excellent performance, but also need to have good appearance and touch. At present, surface decoration products are developing towards two extremes. One is high-gloss and high-transparency polyurethane resin-coated surface decoration products, which mainly reflect most of the light incident on them; Primarily refracting and absorbing the light that strikes them, reflecting only a fraction, which produces fewer image defects, so that such low-gloss coatings are often more aesthetically pleasing. [0003] The traditional matting water-based polyurethane material is to add a...

AI Technical Summary

Problems solved by technology

[0003] The traditional matting water-based polyurethane material is to add a matting agent to the polyurethane dispersion, so that the matting agent floats on the surface of the coating film during the drying process of the coating film to produce microscopic unevenness on the surface of the coating film, thereby achieving the effect of matting. Matting agents added by physical means mainly include high fillers in nature, micro-wax powder, inorganic silica, etc. Although the purpose of matting can be achieved by adding matting agents externally, its disadvantages are also obvious: matting agents are often combined with The resin used often has poor matching, resulting in whitening, grayness, and frosting on the painted surface, which seriously affects the appearance quality of surface decoration products; at the same time, the cost of using a large amount of matting agent is high; the brittleness of the coating increases, and it is easy to Chipping; precipitation of matting agents leading to uneven mixing prior to application resulting in variations in gloss throughout the coating; reduced resistance to rubbing, flexing and rubbing

[0004] In order to avoid some defects caused by externally added matting agents, a Chinese patent publication CN104974324A provides a reaction self-extinction type water-based polyurethane resin and its preparation method, which belongs to sulfonic acid type-carboxylic acid type water-based polyurethane, and does not introduce Acrylic monomers have a single structure, and their properties such as alkali resistance, solvent resistance, and wear resistance cannot meet the requirements

[0005] CN103626930A has described a kind of preparation method of water-based acrylic polyurethane matting resin with phase separation structure, first need to prepare two kinds of polyurethanes of anion type and nonionic type, then carry out seed emulsion polymerization to acrylate mixture in two kinds of polyurethanes to obtain, in preparation Anionic water-based polyurethane is neutralized with triethylamine, which will bring a large odor and high VOC during use, and the existence of this weak acid will accelerate the hydrolysis of molecular chains. At the same time, the emulsion polymerization steps are cumbersome. Difficult to produce in industrialized assembly line is its shortcoming

[0006] CN104193946A discloses a preparation method of self-dulling polyurethane resin, which includes the use of light-absorbing acrylic grafted substances to block, because the end of the molecular chain is double bond-blocked, not isocyanate-blocked, and cannot be further chain-extended and cross-linked with water , smaller molecular weight, poorer tolerance

[0007] Therefore, it is necessary to develop a new formula to solve the various disadvantages of existing self-dull polyurethane resins such as poor tolerance during use.

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