Preparation method of waterborne resin and water-based paint composite

A water-based resin, water-based technology, applied in the field of coatings, can solve the problem that the hardness, water resistance and wear resistance of water-based coatings cannot be met at the same time, and achieve the effect of excellent anti-aging performance, good wear resistance and high hardness

Active Publication Date: 2011-04-20
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this water-based automotive coating only improves the fullness and gloss of the water-based paint, and cannot meet the overall requirements of the water-based paint for comprehensive properties such as gloss, hardness, water resistance, and abrasion resistance. There is a big difference compared to

Method used

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  • Preparation method of waterborne resin and water-based paint composite
  • Preparation method of waterborne resin and water-based paint composite
  • Preparation method of waterborne resin and water-based paint composite

Examples

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preparation example Construction

[0030] The invention discloses a preparation method of water-based resin, comprising the following steps:

[0031] Step a) under the protection of nitrogen, the first monomer, the second monomer, the catalyst and the antioxidant are mixed and reacted to obtain the first product, and the first monomer is trimethylolpropane and neopentyl glycol, The second monomer includes isophthalic acid, isophthalic acid-5-sodium sulfonate and diacid monomers, and the diacid monomers are butenedioic acid and / or glutaconedic acid;

[0032] Step b) Under the protection of nitrogen, the aqueous co-solvent, the third monomer, γ-glycidyl ether propyl trimethoxysilane, free radical initiator, chain transfer agent and the first product are mixed and reacted to obtain the second Second product, the third monomer is glycidyl tertiary carbonic acid ester and functional monomer, and the functional monomer is one of methacrylic acid, isobornyl methacrylate, glycidyl methacrylate and styrene or several; ...

Embodiment 1

[0057] Preparation of water-based resin P1

[0058] According to the formula quantity shown in table 1, prepare according to the following method:

[0059] Step a) According to the formula amount of P1 in Table 1, add the first monomer, the second Dimonomer, catalyst, antioxidant, reflux dehydration, then heat up to 220°C at a heating rate of 10°C / 20min, keep warm and reflux for 3 hours, then depressurize for 2 hours, and cool down to 60°C to obtain the first product;

[0060] Step b) adding the water-based co-solvent into a four-necked flask equipped with a stirrer, a condenser, a thermometer and an oil bath heating device, adding the first product, and then adding glycidyl tertiary carbonate E10P and a siloxane coupling agent, Under the protection of nitrogen, raise the temperature to 138-142°C, add the functional monomer, add the free radical initiator in 3 times, then react for 3 hours, add the chain transfer agent and continue the reaction for 1 hour to obtain the second...

Embodiment 2～5

[0064] The preparation process of water-based resins P2-P5 is the same as in Example 1, and the specific process parameters are shown in Table 1.

[0065] Table 1 The raw material weight ratio formula of the water-based resin prepared in Examples 1-5

[0066]

[0067]

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Abstract

The invention discloses a preparation method of waterborne resin and a water-based paint composite. The waterborne resin prepared with the preparation method of the invention contains various functional groups, such as a polyester group, a polypropylene resin group, an organic siloxane group, a polyurethane group and the like, and is acrylic ester graft modified polyester-type polyurethane water dispersion containing siloxane structure, and the siloxane structure can be hydrolyzed to form inorganic-organic crosslinking structure so as to improve the water resistance and the abrasive resistance of waterborne resin. The acrylic acid functional group structure improves the gloss and the weather fastness of a paint film; meanwhile, the polyester-type polyurethane structure ensures high hardness of the paint film because of larger cohesive energy. The water-based paint composite takes the waterborne resin as the main material for forming films, does not contain toxic and harmful substances of toluene and dimethylbenzene, has excellent gloss, good abrasive resistance, and excellent waterproof property and anti-ageing property and is an environmentally-friendly water-based paint with excellent comprehensive performance.

Description

technical field [0001] The invention relates to the technical field of coatings, more specifically, to a preparation method of a water-based resin and a water-based coating composition. Background technique [0002] Solvent-based paint is a paint that uses an organic solvent as a dispersion medium, and is a commonly used automotive paint. Publication number is that the Chinese patent literature of CN 1130202A and the U.S. patent literature that the patent number is US5288865 have reported a kind of solvent type automobile paint, and this solvent type automobile paint is film-forming resin with hydroxyl acrylic resin, alkyd resin, polyester resin, with Amino resins and polyisocyanates are prepared as crosslinking agents. The Chinese patent literature with the publication number CN 1386800A reports a solvent-based nano-coating, which has excellent scratch resistance, high hardness, and abrasion resistance, and is an important automotive coating. However, the solvent-based co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/65C08G18/63C08F283/01C08G63/688C08G63/91C09D175/04C09D7/12
Inventor 张红明吕金龙李季王献红王佛松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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