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Water-based peelable resin and preparation method thereof

A water-based, resin-based technology, applied in the coating and other directions, can solve the problems of no water-based peelable resin, easy cracking of the paint film, and high brittleness of the paint film.

Active Publication Date: 2020-02-07
HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the paint films made of water-based peelable resins on the market are brittle, have low strength, and are not easy to peel off as a whole, and the paint films are easy to crack after high and low temperature cycles, so water-based peelable resins are not widely used.

Method used

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  • Water-based peelable resin and preparation method thereof
  • Water-based peelable resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A water-based peelable resin, which comprises, in terms of parts by mass, 30 parts of polyether diols, 40 parts of diisocyanates, 11 parts of flexible hydroxyl-terminated silicone oligomers, 10 parts of dimethylol propionic acid, 6 parts of diethylene glycol, 4 parts of stannous octoate and 2 parts of acetone;

[0050] Wherein, the mass ratio of the dimethylol propionic acid to the flexible hydroxyl-terminated silicone oligomer is 0.9:1; the molar ratio of -NCO:-OH in the water-based peelable resin is controlled at 1.7.

[0051] In the above scheme, the molecular weight of the polyether diol is greater than 2000; the diisocyanate is 3-isocyanate methylene-3,5,5-trimethylcyclohexyl isocyanate (IPDI);

[0052] The organosilicon monomer used in the synthesis of the flexible hydroxyl-terminated organosilicon oligomer is phenyltriethoxysilane.

[0053] In the above scheme, the polyether glycol is selected from mixed polyethylene glycol: propylene glycol.

[0054] Prepara...

Embodiment 2

[0060] A water-based peelable resin, which comprises, in parts by mass, 40 parts of polyether diols, 50 parts of diisocyanates, 20 parts of flexible hydroxyl-terminated silicone oligomers, 15 parts of dimethylol Propionic acid, 8 parts of diethylene glycol, 5 parts of stannous octoate, 30 parts of trimethylolpropane triacrylate with a functionality of 3, 5 parts of polymethylacrylate-divinylbenzene with a crosslinking degree of 40% , 10 parts of nano-MoS 2 / TiO 2 and 3 parts acetone;

[0061] Wherein, the mass ratio of the dimethylol propionic acid to the flexible hydroxyl-terminated organosilicon oligomer is 1.5:1; the molar ratio of -NCO:-OH in the water-based strippable resin is controlled to be 2; the Nano-MoS 2 / TiO 2 Mix with the polymethyl acrylate-divinyl benzene according to the mass ratio of 2:1.

[0062] In the above scheme, the molecular weight of the polyether diol is greater than 2000; the diisocyanate is diphenylmethane diisocyanate (MDI); the organosilicon...

Embodiment 3

[0070] A water-based peelable resin, which comprises, in parts by mass, 20 parts of polyether diols, 30 parts of diisocyanates, 5 parts of flexible hydroxyl-terminated silicone oligomers, 5 parts of dimethylol Propionic acid, 2 parts of diethylene glycol, 1 part of stannous octoate, 20 parts of trimethylolpropane triacrylate with a functionality of 3, 1 part of polymethylacrylate-divinylbenzene with a crosslinking degree of 40% , 2.5 parts of nano-MoS 2 / TiO 2 and 2 parts acetone;

[0071] Wherein, the mass ratio of the dimethylol propionic acid to the flexible hydroxyl-terminated organosilicon oligomer is 1:1; the molar ratio of -NCO:-OH in the water-based strippable resin is controlled to be 1.6; the Nano-MoS 2 / TiO 2 It is mixed with the polymethyl acrylate-divinylbenzene in a mass ratio of 2.5:1.

[0072] In the above scheme, the molecular weight of the polyether diol is greater than 2000; the diisocyanate is toluene diisocyanate (TDI); the silicone monomer used in th...

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Abstract

The invention provides an aqueous peelable resin, which contains, by mass, 20-40 parts of polyether diol, 30-50 parts of diisocyanate, and 5-20 parts of a flexible hydroxyl-terminated organosilicon oligomer. According to the present invention, the flexible hydroxyl-terminated organosilicon oligomer is firstly synthesized from the organosilicon monomer, and the organosilicon oligomer is grafted topolyether diol so as to further participate in the synthesis reaction of polyurethane to form the elastomer of the silicon-oxygen polyether mixing soft segment, such that the tensile strength of the paint film is improved, the brittleness of the paint film is reduced, and the peeling off of the whole paint film is achieved.

Description

technical field [0001] The present invention relates generally to the field of coatings, and in particular, to aqueous strippable resins and methods for their preparation. Background technique [0002] The strippable resin is used as the film-forming substance of the strippable coating, and the resin is required to have a certain strippability. The cohesion of the resin should be large enough so that the paint film is not easy to break during the stripping process and there is no residue on the substrate; the adhesion between the resin and the substrate is moderate, which can ensure the adhesion of the coating film to the substrate, and at the same time when peeling is required In addition, the film-forming resin must also have a certain degree of elasticity, which can slow down the impact of the outside world on the substrate. At present, the paint films made of water-based peelable resins on the market are brittle, have low strength, and are not easy to peel off as a whol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/06C09D4/02C09D5/20C09D7/61C09D7/65C08G18/48C08G18/61C08G18/34C08G18/32C08G18/75C08G18/66C08G18/76C08G18/12
CPCC08G18/0823C08G18/12C08G18/4825C08G18/4833C08G18/61C08G18/6692C08G18/755C08G18/7614C08G18/7671C08K2003/2241C08K2003/3009C09D4/06C09D5/20C08G18/3206C08G18/348
Inventor 王瑞宏郭晓峰胡中源周泽钱李幕英
Owner HEBEI CHENYANG INDAL & TRADE GROUP CO LTD