Polyester-modified aqueous acrylate and automobile aqueous paint composition

A water-based acrylate and polyester modification technology, applied in coatings and other directions, can solve problems such as performance gaps, and achieve the effects of enhancing weather resistance, enhancing gloss and color retention, and improving sand and stone impact resistance.

Active Publication Date: 2013-11-13
CHANGCHUN SANHUA IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the performance of some intermediate-coating-free commercial automotive coatings has always been far behind the traditional four-coat coating

Method used

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  • Polyester-modified aqueous acrylate and automobile aqueous paint composition
  • Polyester-modified aqueous acrylate and automobile aqueous paint composition
  • Polyester-modified aqueous acrylate and automobile aqueous paint composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 20g terephthalic acid, 22g butanediol, 26g hexanediol, 0.003g dibutyltin oxide, 6g cis-butane into a four-necked flask equipped with a stirrer, thermometer, condenser, water separator and nitrogen protection Acrylic anhydride and 0.001g hydroquinone were heated to 165°C, the material began to melt, stirred at 500rpm, gradually heated to 235°C within 3h, and continued to esterify for 2h. Vacuum until the vacuum degree was less than -0.098MPa for reduction Pressure, remove the small molecule products and water generated in the polycondensation reaction, react until the acid value is less than 5mg KOH / g, add 3g trimellitic anhydride, react for 1h, stop the reaction, cool to 65°C, add butylene glycol methyl ether to obtain the first intermediate product.

[0025] 3g vinyl triethoxysiloxane, 5g acrylic acid, 4g butyl acrylate, 7g hydroxyethyl acrylate, 4g hexafluorobutyl acrylate, 0.001g dodecyl mercaptan, 0.0005g azobisisobutyronitrile Stir uniformly, then, add dropwise t...

Embodiment 2

[0027] Add 5g terephthalic acid, 32g butanediol, 6g hexanediol, 0.003g dibutyltin oxide, 16g cis-butane into a four-neck flask equipped with a stirrer, thermometer, condenser, water separator and nitrogen protection Acrylic anhydride and 0.001g hydroquinone were heated to 165°C, the material began to melt, stirred at 500rpm, gradually heated to 235°C within 3h, and continued to esterify for 2h. Vacuum until the vacuum degree was less than -0.098MPa for reduction Pressure, remove the small molecule products and water generated in the polycondensation reaction, react until the acid value is less than 5mg KOH / g, add 8g trimellitic anhydride, react for 1h, stop the reaction, reduce the temperature to 65 ℃, add butanediol methyl ether to obtain the first intermediate product.

[0028] 7g vinyl triethoxysiloxane, 8g acrylic acid, 3g butyl acrylate, 10g hydroxyethyl acrylate, 6g hexafluorobutyl acrylate, 0.001g dodecyl mercaptan, 0.0005g azobisisobutyronitrile Stir uniformly, then add ...

Embodiment 3

[0031] Add 26g terephthalic acid, 32g butanediol, 16g hexanediol, 0.003g dibutyltin oxide, 8g cis-butane into a four-neck flask equipped with a stirrer, thermometer, condenser, water separator and nitrogen protection Acrylic anhydride and 0.001g hydroquinone were heated to 165°C, the material began to melt, stirred at 500rpm, gradually heated to 235°C within 3h, and continued to esterify for 2h. Vacuum until the vacuum degree was less than -0.098MPa for reduction Press to remove the small molecule products and water generated in the polycondensation reaction, and react until the acid value is less than 5mg KOH / g, add 5g trimellitic anhydride, react for 1h, stop the reaction, cool to 65°C, add butanediol methyl ether to obtain the first intermediate product.

[0032] Combine 5g vinyl triethoxysiloxane, 6g acrylic acid, 3g butyl acrylate, 4g hydroxyethyl acrylate, 8g hexafluorobutyl acrylate, 0.001g dodecyl mercaptan, 0.0005g azobisisobutyronitrile Stir uniformly, then add dropwis...

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Abstract

The invention provides a compound with a structure of a formula (I), wherein m, n, p, q, r, s, t, and u are degrees of polymerization, m is no less than 0 and no greater than 50, n is no less than 0 and no greater than 50, p is no less than 0 and no greater than 50, q is no less than 0 and no greater than 50, r is no less than 0 and no greater than 50, s is no less than 0 and no greater than 50, t is no less than 0 and no greater than 50, and u is no less than 0 and no greater than 50. The invention also provides an automobile aqueous paint composition comprising, by weight: 48-70 parts of polyester-modified aqueous acrylate with the structure of the formula (I), 0.6-1.2 parts of an aqueous dispersing agent, 0.3-0.9 parts of an aqueous leveling agent, 0.5-1.6 parts of an aqueous defoaming agent, 5-8 parts of a filling material, 7-12 parts of a pigment, 0.4-0.9 parts of an aqueous rheological additive, and 21-30 parts of a crosslinking agent. The automobile aqueous paint provided by the invention can be polished, and has the advantages of good gloss, good gasoline resistance, and good weather resistance. The composition can be used for replacing automobile intermediate coat and basecoat, such that automobile intermediate coat coating can be eliminated.

Description

Technical field [0001] The present invention relates to the field of automotive coatings, in particular to a polyester modified waterborne acrylate and automotive waterborne paint composition. Background technique [0002] With the rapid development of the automotive coating industry, energy conservation and emission reduction have become a major issue facing the global automotive industry. The volatile organic compound (VOC) emissions caused by the traditional solvent-based automotive coatings during the coating process are greater than 200g / m2, which greatly exceeds the VOC emissions (less than 45g / m2) of automotive coatings in industrialized countries. It is non-toxic, The research and development of waterborne automotive coatings with harmful volatile organic compounds is very important (Song Hua, Wu Tao, "Coating Industry", 2002, 32(10): 19-21). On the other hand, during the baking process of the paint film for automobile coating, a large amount of carbon dioxide will be re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/01C08F230/08C08F220/06C08F220/18C08F220/28C08F220/22C08G63/52C09D151/08C09D7/12
Inventor 张振久马海松高成勇
Owner CHANGCHUN SANHUA IND
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