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Double-component polyurethane base coating and preparation method thereof

A two-component polyurethane and primer technology, used in polyurea/polyurethane coatings, polyurea/polyurethane adhesives, coatings, etc., can solve problems such as poor stability, and achieve easy mixing, simple use, and good adhesion. The effect of contact strength

Inactive Publication Date: 2019-07-19
JINAN HANSIMAN TIMES TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of poor stability of existing polyurethane primers, the present invention provides a two-component polyurethane primer and a preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A two-component polyurethane primer, including A component and B component, the weight ratio of A component and B component is 10:1, and each component is composed of the following substances in weight percentage: A component: two Isocyanate prepolymer pulp 20%, isophorone diisocyanate 22%, methyl acetate 58%; component B: methyl acetate 50%, anilinomethyltriethoxysilane 21%, silane coupling agent KH5601% , Dibutyltin dilaurate 28%;

[0017] Among them, the diisocyanate prepolymer is composed of the following parts by weight: 500 parts of polyether polyols with a number average molecular weight of 1000, 0.05 parts of concentrated phosphoric acid, 500 parts of MDI-50, 7 parts of anhydrous calcium chloride, phthalic acid 120 parts of dioctyl ester, 320 parts of talc, 125 parts of carbon black, 10 parts of sodium dodecylbenzenesulfonate and 12 parts of white carbon black.

Embodiment 2

[0019] A two-component polyurethane primer, including A component and B component, the weight ratio of A component and B component is 8:1, and each component is composed of the following substances in weight percentage: A component: two Isocyanate prepolymer pulp 15%, polymer MDIPM200 22%, methyl acetate 63%; B component: methyl acetate 60%, anilinomethyltriethoxysilane 17%, silane coupling agent KH5600.5%, dilaurel Dibutyltin Oxide 22.5%.

[0020] Among them, the diisocyanate prepolymer is composed of the following parts by weight: 520 parts of polyether polyols with a number average molecular weight of 1000, 0.08 parts of concentrated phosphoric acid, 80 parts of MDI-50480 parts, 10 parts of anhydrous zinc chloride, phthalic acid 130 parts of dioctyl ester, 310 parts of talc, 118 parts of carbon black, 12 parts of sodium dodecylbenzenesulfonate and 11 parts of white carbon black.

Embodiment 3

[0022] A two-component polyurethane primer, including A component and B component, the weight ratio of A component and B component is 12:1, and each component is composed of the following substances by weight percentage: A component: two Isocyanate prepolymer pulp 15%, triphenylmethane triisocyanate 18%, methyl acetate 67%; component B: methyl acetate 55%, anilinomethyltriethoxysilane 19%, silane coupling agent KH5601% , Dibutyltin dilaurate 25%.

[0023] Among them, the diisocyanate prepolymer is composed of the following parts by weight: 550 parts of polyether polyols with a number average molecular weight of 1000, 0.1 parts of concentrated phosphoric acid, 50 parts of MDI-50450 parts, 12 parts of anhydrous zinc chloride, phthalic acid 140 parts of dioctyl ester, 300 parts of talc, 110 parts of carbon black, 14 parts of sodium dodecylbenzenesulfonate and 10 parts of white carbon black.

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PUM

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Abstract

The invention discloses a double-component polyurethane base coating which comprises a component A and a component B, wherein the component A consists of diisocyanate prepolymer slurry, short-chain isocyanate and methyl acetate; the component B consists of methyl acetate, phenylamine methyl triethoxy silane, a silane coupling agent and dibutyltin dilaurate. The double-component polyurethane base coating has the beneficial effects that the double-component polyurethane base coating consists of double components, is capable of preventing instability of a single-component polyurethane base coating system and has good adhesion strength after long-term storage, and the two components of the polyurethane base coating are easy to mix, simple to use and applicable to large-scale industrial production.

Description

technical field [0001] The invention relates to the field of adhesives, in particular to a two-component polyurethane primer and a preparation method thereof. Background technique [0002] The primer is an auxiliary material evenly coated on the surface of the substrate to promote the bonding of the substrate and the adhesive, and is used to improve the strength and long-term stability of the bond. The primer has good wetting and adhesion to the surface of many difficult-to-stick substrates, and can play the role of a bridge. Through the primer, the difficult-to-stick substrate and some kind of adhesive are bonded together. The primer on the surface of the polished substrate can also play a role of filling, solving the problem that the adhesive itself is too high in viscosity and cannot fully contact the substrate. In some metal bonding processes, the primer also plays a role in anti-corrosion. . Primers are often used to improve the bonding of glass and adhesives, improve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D7/61C09D7/63C09J175/08C09J11/04C09J11/06
CPCC09D7/61C09D7/63C09D175/08C09J11/04C09J11/06C09J175/08C08K13/02C08K3/34C08K3/04C08K5/12C08K3/36
Inventor 于虎韩永德杨士勇黄延青
Owner JINAN HANSIMAN TIMES TECH