Aqueous polyester-acrylic resin hybrid body and preparation method

A technology of acrylic resin and water-based polyester, which is applied in the direction of polyester coatings and coatings, which can solve the problems of poor weather resistance and chemical resistance, and achieve the effects of good hydrophilicity, excellent storage stability and high hardness

Pending Publication Date: 2019-04-26
江西高信前沿科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyester coatings are widely used, with full coating film and excellent mechanical properties, but relatively poor weather resistance and chemical resistance

Method used

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  • Aqueous polyester-acrylic resin hybrid body and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Step 1, the synthesis of water-based unsaturated polyester

[0042]26.39g of neopentyl glycol, 10.475g of trimethylolpropane, 15.645g of dimethylolpropionic acid, 28.275g of phthalic anhydride, 1.3195g of maleic anhydride, 28.275g of adipic acid, 0.11 g of catalyst monobutyltin oxide was added to a four-necked flask equipped with a temperature controller, a water separator, a condensing reflux pipe, and a stirrer, heated until the condensing reflux pipe began to reflux, kept for 1-2h, and added 8.85g (8 %) Xylene is fully refluxed with water, kept at 200°C for 1-3 hours, and the acid value is measured. When the acid value reaches the design acid value of 65mgKOH / g, cool down to 80-100°C and add 25g of ethylene glycol butyl ether to adjust the solid content to 80%. , cooled to 50°C and discharged. That is, a water-based unsaturated polyester resin is obtained.

[0043] Step 2, the synthesis of waterborne polyester-acrylic resin hybrid

[0044] Add the water-based unsa...

Embodiment 2

[0046] Step 1, the synthesis of water-based unsaturated polyester

[0047] 36.31 g of 2-butyl-2-ethyl-1,3 propanediol, 12.52 g of trimethylolpropane, 10.73 g of dimethylolpropionic acid, 28.62 g of 1,4-cyclohexanedicarboxylic acid , the maleic anhydride of 1.34g, the adipic acid of 22.36g, the catalyst monobutyltin oxide of 0.224g, add in the four-necked flask that temperature controller, water trap, condensation reflux pipe, stirrer are housed, Heat until the condensing reflux tube starts to reflux, keep warm for 1-2h, add 8.95g (8%) xylene to fully reflux with water, keep warm at 200°C for 2-3h, measure the acid value, when the acid value reaches the design acid value of 45mgKOH / g, Cool down to 80-100°C and add 25g propylene glycol butyl ether to adjust the solid content to 80%, cool down to 50°C and discharge. That is, a water-based unsaturated polyester resin is obtained.

[0048] Step 2, the synthesis of waterborne polyester-acrylic resin hybrid

[0049] Add the water-...

Embodiment 3

[0051] Step 1, the synthesis of water-based unsaturated polyester

[0052] 32.6g of 1,4-cyclohexanedimethanol, 13.01g of trimethylolpropane, 13.2g of dimethylolpropionic acid, 13.6g of phthalic anhydride, 13.58g of 1,4-cyclohexanedicarboxylic acid , the maleic anhydride of 1.34g, the adipic acid of 23.24g, the catalyst dibutyltin oxide of 0.224g, add in the four-necked flask that temperature controller, water trap, condensation reflux pipe, stirrer are housed, Heat until the reflux pipe starts to reflux, keep warm for 1-2h, add 8.85g (8%) xylene to fully reflux with water, keep warm at 200°C for 2-3h, measure the acid value, when the acid value reaches the design acid value of 55mgKOH / g, Cool down to 80-100°C and add 25g ethylene glycol butyl ether to adjust the solid content to 80%, cool down to 50°C and discharge. That is, a water-based unsaturated polyester resin is obtained.

[0053] Step 2, the synthesis of waterborne polyester-acrylic resin hybrid

[0054] Put the wat...

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Abstract

The invention discloses an aqueous polyester-acrylic resin hybrid body and a preparation method. The hybrid body is characterized in that a hybrid body copolymer has an acid value of 40-50mgKOH/g, andcomprises the following raw materials in parts by weight: 100 parts of a polyester prepolymer, 50-150 parts of acrylic resin, 50-100 parts of a hybridization cosolvent, 8-16 parts of a neutralizing agent and 150-250 parts of deionized water, wherein the polyester prepolymer has an acid value of 45-65mgKOH/g, and the acrylic resin has an acid value of 15-45mgKOH/g. The aqueous polyester-acrylic resin hybrid body disclosed by the invention can be adopted to prepare an amino stoving varnish together with excellent performance when being baked with amino resin (AR) at 150 DEG C. A stoving varnishmembrane has excellent mechanical properties such as wearing resistance, impact resistance, hardness, adhesiveness and the like, and excellent chemical properties such as water resistance, solvent resistance, corrosion resistance and the like, and the stoving varnish membrane is uniform and flat and good in glossiness. The hybrid body can be widely applied to the field of high-end automotive topcoats.

Description

technical field [0001] The invention belongs to the technical field of acrylic resin modified polyester resin, and in particular relates to a water-based polyester-acrylic resin hybrid body and a preparation method. Background technique [0002] Polyester-based coatings are widely used, with full coating film and excellent mechanical properties, but relatively poor weather resistance and chemical resistance. Acrylic-based coatings have excellent lightfastness, outdoor aging performance and chemical corrosion resistance, etc. Modification of unsaturated polyester with acrylic resin can achieve the advantages of both, and also has the advantage of reducing costs. [0003] In recent years, in order to meet the requirements of relevant environmental protection standards at home and abroad, water-based polyester resins have been widely developed, but it is difficult for the domestically developed water-based polyester resins to be widely used in industry. The preparation method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/06C09D133/12C08F220/14C08F220/20C08F220/18C08F220/06
CPCC09D167/06C08F220/14C08L33/12C08F220/20C08F220/1808C08F220/06C08F220/1804
Inventor 闫福安王黎葛建中袁维金
Owner 江西高信前沿科技有限公司
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