Waterborne polyurethane as well as preparation method and application thereof

A water-based polyurethane and water-based technology, applied in polyurea/polyurethane coatings, coatings, anti-corrosion coatings, etc., can solve the problems of non-sustainable development and dependence on anti-corrosion coatings, achieve good pencil hardness, improve corrosion resistance, and source of raw materials wide range of effects

Active Publication Date: 2016-07-20
中科应化(长春)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the raw materials of the film-forming resins used in the above two invention patents all come from petrochemical products. Therefore, the preparation of anti-corrosion coatings is still heavily dependent on petrochemical resources, which is not sustainable.

Method used

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  • Waterborne polyurethane as well as preparation method and application thereof
  • Waterborne polyurethane as well as preparation method and application thereof
  • Waterborne polyurethane as well as preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0057] The present invention also provides a kind of preparation method of waterborne polyurethane, comprising:

[0058] 1) will have the H-R of formula (I) structure 2 -H, ONC-R 1 -CNO and a solvent are mixed and reacted to obtain a first reaction mixture;

[0059]

[0060] Among them, 1≤m≤30, 1≤n≤35, 1≤x≤30, 1≤y≤35;

[0061] The R 1 It is an arylene group of C6-C35, a cycloalkylene group of C5-C30 or an alkylene group of C3-C12;

[0062] 2) reacting the first reaction mixture, the hydrophilic chain extender N-methyldiethanolamine and the catalyst to obtain the second reaction mixture;

[0063] 3) react the second reaction mixture with diol, use R 3 -H is neutralized to obtain water-based polyurethane with a structure of formula (II);

[0064] The R 3 -R in H 3 is halogen or has a structure of formula (b),

[0065]

[0066] where the R b C1-C5 alkyl or C1-C5 haloalkyl;

[0067]

[0068] According to the present invention, the present invention will have H-...

Embodiment 1

[0077] Embodiment 1 waterborne polyurethane preparation

[0078] 1) Preparation of poly(carbonate-ether) glycol

[0079] The Zn of 0.12g terephthalic acid chain transfer agent and 0.015g [Co (CN) 6] 2 bimetallic catalysts join in the autoclave, add the 16g propylene oxide that contains 5.5g maleic anhydride in the still, then to Fill the kettle with 5.8 g of carbon dioxide and react for 24 hours at a pressure of 2 MPa and a temperature of 55° C. to obtain poly(carbonate-ether) glycol.

[0080] 2) Preparation of waterborne polyurethane:

[0081] Add 120 grams of prepared poly(carbonate-ether) glycol with a molecular weight of 1500 Daltons into the three-necked flask, heat to 100°C, dehydrate at -0.98MPa for 1 hour, cool to 75°C, and protect the mixture under nitrogen , add 200 grams of butanone and 62 grams of diphenylmethane diisocyanate, react for 2 hours, then cool down to 30 ° C, dropwise add 0.0018 grams of dibutyltin dilaurate catalyst, add 9.5 grams of N-methyldiethano...

Embodiment 2

[0083] 139 grams of water-based polyurethane prepared in Example 1, 3 grams of water-based polyaniline powder (prepared according to Patent 201210215967.2 Example 2) were put into a sand mill jar, stirred at a speed of 900 rpm for 2 hours; then at 1300 rpm Add 6.9 grams of photoinitiator Irfacure184, 2 grams of leveling agent BYK-380N, 3 grams of defoamer BYK-019 at a speed of 1000 rpm, and add 100 grams of water-based curing agent Bayhydur3100 at a stirring speed of 1000 rpm , continue stirring for 2 minutes to obtain light-thermal dual curing polyaniline anti-corrosion coating, denoted as WP1.

[0084] Spray the obtained water-based UV-heat dual-curing polyaniline coating WP1 on a pre-polished, degreased, and derusted metal steel plate, level it at 50°C for 3 minutes, irradiate with a 3kw UV lamp, and cure for 20 seconds, then Bake at 55°C for 3 minutes to obtain a WP1 anti-corrosion coating. The paint film performance test was carried out on the coating, and the test resul...

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Abstract

The invention provides waterborne polyurethane. The waterborne polyurethane provided by the invention contains an R2 structure, so that when a membrane-forming agent prepared by utilizing waterborne polyurethane as a raw material is applied to preparation of an anticorrosive paint, a membrane of the obtained anticorrosive paint has relatively high pencil hardness and is relatively compact, so that the non-corrosibility is improved.

Description

technical field [0001] The invention relates to the field of anti-corrosion coatings, in particular to a waterborne polyurethane and its preparation method and application. Background technique [0002] The problem of metal corrosion pervades all sectors of the national economy, causing great harm to the development of the national economy. Countries all over the world are actively looking for various technologies for corrosion protection. Polyaniline is a high-tech new material with special functions. Since DeBerry discovered in 1985 that the polyaniline film synthesized by electrochemical method in acidic medium can passivate the surface activity of stainless steel and have anti-corrosion properties, polyaniline has been used as a As an important anti-corrosion material, blending it with film-forming resin to prepare composite coatings has become a hot spot in the research field of heavy-duty anti-corrosion coatings. [0003] At present, with the increasingly serious env...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/67C08G18/32C09D175/14C09D5/08C09D7/12
CPCC08G18/3206C08G18/3275C08G18/6705C08G18/7671C09D5/08C09D7/65C09D175/14C08L79/02
Inventor 李颖张红明苗宇阳乔立军王献红王佛松
Owner 中科应化(长春)科技有限公司
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