Monocomponent polyurethane coating and preparation method thereof

A polyurethane coating, a single-component technology, applied in wax coatings, coatings, etc., can solve the problems of slow curing speed, easy bubbling and foaming during storage, achieve fast curing speed, improve coating gloss and comprehensive Performance, the effect of avoiding foaming

Inactive Publication Date: 2015-10-21
四川珍福堂商贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention provides a kind of one-component polyurethane coating and preparation method thereof, to improve the slow curing speed of existing one-component polyurethane coating, easy foaming, and the problem of easy bubbling during storage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In parts by weight, the components are as follows:

[0019] 20 parts of diisocyanate, 40 parts of polyether, 50 parts of chlorinated paraffin, 35 parts of acrylic resin, 20 parts of xylene, 15 parts of butyl acetate, 50 parts of filler, 10 parts of latent curing agent and 40 parts of catalyst, the acid of acrylic resin The value is less than 12mgKOH / g, and the latent curing agent is a mixture of acetone-ethylenediamine condensate and methyl isobutyl ketone-ethanolamine condensate.

[0020] In this embodiment, the acid value of the acrylic resin is 11 mgKOH / g, and the acetone-ethylenediamine condensate and the methyl isobutyl ketone-ethanolamine condensate are mixed at a ratio of 1:1.

[0021] The acrylic resin is added to the raw material components, and the acid value of the acrylic resin is less than 12mgKOH / g. In this way, when the one-component polyurethane coating is used, the curing speed of the coating is fast and the quick-drying property is good. The raw mater...

Embodiment 2

[0029] In parts by weight, the components are as follows:

[0030] 40 parts of diisocyanate, 65 parts of polyether, 75 parts of chlorinated paraffin, 60 parts of acrylic resin, 50 parts of xylene, 25 parts of butyl acetate, 90 parts of filler, 20 parts of latent curing agent and 80 parts of catalyst, the acid of acrylic resin The value is less than 12mgKOH / g, and the latent curing agent is a mixture of acetone-ethylenediamine condensate and methyl isobutyl ketone-ethanolamine condensate.

[0031] In this embodiment, the acid value of the acrylic resin is 5 mgKOH / g, and the acetone-ethylenediamine condensate and the methyl isobutyl ketone-ethanolamine condensate are mixed at a ratio of 2:1. The diisocyanate is toluene diisocyanate, and of course, other diisocyanates, such as diphenylmethane diisocyanate, can also be used.

[0032] The filler is one or a mixture of calcium carbonate, kaolin and talc. Fillers can increase the gas-liquid contact surface and make them mix strongl...

Embodiment 3

[0039] In parts by weight, the components are as follows:

[0040] 32 parts of diisocyanate, 58 parts of polyether, 65 parts of chlorinated paraffin, 55 parts of acrylic resin, 40 parts of xylene, 20 parts of butyl acetate, 77 parts of filler, 18 parts of latent curing agent and 50 parts of catalyst, the acid of acrylic resin The ester is less than 12mgKOH / g, and the latent curing agent is a mixture of acetone-ethylenediamine condensate and methyl isobutyl ketone-ethanolamine condensate.

[0041] In this example, the acid value of the acrylic resin is 10 mgKOH / g, the acetone-ethylenediamine condensate and the methyl isobutyl ketone-ethanolamine condensate are mixed at a ratio of 1:1, the diisocyanate is toluene diisocyanate, and the filler is carbonic acid Calcium, the catalyst is a mixture of stannous octoate and dibutyltin dilaurate, the mass ratio of the two is 1:1.

[0042] Present embodiment also provides a kind of method for preparing above-mentioned one-component polyu...

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Abstract

The invention provides a monocomponent polyurethane coating, and relates to the field of coating. The monocomponent polyurethane coating comprises, by weight, the following components of 20 to 40 parts of diisocyanate, 40 to 65 parts of polyether, 50 to 75 parts of chlorcosane, 35 to 60 parts of chlorcosane, 20 to 50 parts of xylene, 15 to 25 parts of butyl acetate, 50 to 90 parts of padding, 10 to 20 parts of curing agent and 40 to 80 parts of catalyst. The acid value of the chlorcosane is smaller than 12 mg KOH/g, and the curing agent is a mixture of acetone-ethidene diamine condensation compound and methyl isobutyl ketone-ethanol amine condensation compound. The provided monocomponent polyurethane coating has the advantages that the curing speed is high, blistering in the crosslinking process and the storage process can be avoided effectively, and the practicability is high. The invention further provides a preparation method for the monocomponent polyurethane coating.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a one-component polyurethane coating and a preparation method thereof. Background technique [0002] The one-component polyurethane coating is a moisture-curing coating, and its resin part is a prepolymer containing NCO end groups. The NCO group reacts with moisture in the air to form urea bonds and solidify into a film. The biggest advantage of this kind of paint is that it is easy to construct, especially for users who do not use much paint for home decoration, there is no need to consider the problem of weighing, and the unused paint can be reused in the future. Moreover, the impact resistance and abrasion resistance of one-component polyurethane coatings are also very good. However, the curing speed of the existing one-component polyurethane coatings is relatively slow, and the coatings are also prone to foaming during the crosslinking process, and phenomena such as tank swelling and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D133/00C09D7/12C09D191/06
Inventor 周宏林
Owner 四川珍福堂商贸有限公司
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