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Silicone modified polyacrylate and its prepn and application

A technology of acrylate and hydroxyl-containing acrylate, which is applied in the field of water-soluble silicone-modified acrylate polymer and its preparation, and can solve the problems of poor water resistance of the coating, unsatisfactory water resistance, and poor gloss of the coating.

Inactive Publication Date: 2007-01-03
SHENZHEN HANLONG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Even when the coating-forming accelerator or the inorganic pigment can be mixed with the aqueous emulsion without coagulation, the gloss of the coating obtained from the emulsion is poor
In addition, a large amount of stabilizer must be used, so the water resistance of the coating obtained from this emulsion is poor
Chinese patent CN94194922.2 discloses a siloxane-modified acrylate polymer emulsion, which uses ethylenically unsaturated monomers containing sulfonic acid groups, but still has stability problems. On the other hand, its water resistance is not satisfactory enough. satisfy
Chinese patent CN01105010.1 discloses a silicone-modified acrylate emulsion, which introduces hydroxyl-containing polysiloxane in the later stage of the polymerization reaction, but the water resistance of this emulsion is poor

Method used

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Embodiment Construction

[0019] (Meth)acrylic acid ester of the present invention can select (meth)acrylic acid C 1 -C 8 Any one of the alkyl esters or a mixture of any several in any proportion.

[0020] The hydroxy acrylate of the present invention is preferably hydroxyethyl acrylate or hydroxypropyl acrylate.

[0021] The vinyl siloxane of the present invention preferably has the general formula CH 2 =CHSi(OR 1 ) 3 of siloxanes, where R 1 is an alkyl group. R is especially preferred 1 is C 1 -C 4 Alkyl vinyl siloxane. The vinyl siloxane used in the present invention can be prepared by catalytic alcoholysis of vinyl trichlorosilane.

[0022] The present invention is illustrated by the following examples.

[0023] 1. Vinyl siloxane preparation

[0024] According to stoichiometry, put 100g of vinyltrichlorosilane, the organic silicon raw material, into the reactor, and dissolve Pt(PPh with 69g of ethanol 3 ) 4 After 1g, put it into the high-level tank, control the temperature of the reac...

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Abstract

The present invention relates to water soluble organosilicon modified polyacrylate and its preparation process. The organosilicon modified polyacrylate has number average molecular weight of 33,000-70,000, and is prepared through the first free radical polymerization with monomers, including (methyl) acrylate 15-85 wt%, hydroxyl group containing acrylate 6-18 wt%, (methyl) acrylic acid 5-17 wt%, styrene 0-25 wt%, acrylonitrile 0-15 wt%, Veova 0-30 wt% and vinyl siloxane 1-20 wt%, under the action of initiator inside alcohol or alcohol ether medium, and the subsequent neutralization with ammonia or organic amine to produce salt. The polymer of the present invention has high storage stability, high water resistance, high chemical resistance, excellent heat resistance and electric insulating performance, and may be used widely as filming material for various paint products.

Description

technical field [0001] The invention relates to a silicone-modified acrylate polymer, in particular to a water-soluble silicone-modified acrylate polymer and a preparation method and application thereof. Background technique [0002] Due to good film-forming properties, aqueous acrylate polymer emulsions have been widely used as film-forming substances in coatings, and are commonly used in architectural coatings. However, its anti-fouling property is not good, and its water resistance and weather resistance are poor, so it cannot meet the coating and application requirements of substrates such as metal, glass, and carbon fiber. As a result, products that modify acrylic polymers have appeared, usually by introducing organic silicon for modification. Commonly used siloxane compounds use Si-O bond energy greater than C-C bond energy, and are stable to light and heat. Not easy to degrade characteristics. The early use is to add silicone resin to acrylic polymer, but the compat...

Claims

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Application Information

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IPC IPC(8): C08F220/16C08F2/44C08K5/5415C09D133/08
Inventor 刘晓国
Owner SHENZHEN HANLONG TECH DEV
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