Preparation method of polyester modified hydroxyl polyacrylate, and paint containing polyester modified hydroxyl polyacrylate

A hydroxyl polyacrylate and polyester modification technology, which is applied in the field of polyacrylate, can solve the problems of poor wetting performance of resins on pigments and fillers, high content of acrylate monomers, and poor compatibility of curing agents, etc., to achieve Excellent physical and chemical properties, good resistance to chemical media, drying speed and grinding effect

Active Publication Date: 2012-09-05
YINGDE BOTE CHEM INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the scheme of the above-mentioned patent application 200710031047.4, although the compatibility between the resin components is better than the effect of blending modification, the reactivity of the carbon-carbon double bond of the macromonomer is not as good as that of the small molecule acrylic acid due to steric hindrance. Ester monomers, the conversion rate of macromonomers participating in the copolymerization reaction is not high; in addition, because of the existence of macromonomers in the reaction system of the described scheme, the polymerization rate of acrylate monomers and the conversion rate of final monomers must be Reduced, the polymerization product contains a large amount of residual monomers that will pollute the environment
[0004] In summary, at present, hydroxyl polyacrylates generally have the following problems: (1) low solid content, generally 40-60%; (2) poor wetting performance of resin to pigments and fillers; (3) ) The compatibility between hydroxyl polyacrylate and isocyanate curing agent is poor, and the two-component coating film prepared with it has poor appearance and low gloss, and it is difficult to meet the needs of automotive coatings.
(4) The content of residual acrylate monomer is high, the production cost is high, and the production safety is not good, etc.

Method used

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  • Preparation method of polyester modified hydroxyl polyacrylate, and paint containing polyester modified hydroxyl polyacrylate
  • Preparation method of polyester modified hydroxyl polyacrylate, and paint containing polyester modified hydroxyl polyacrylate
  • Preparation method of polyester modified hydroxyl polyacrylate, and paint containing polyester modified hydroxyl polyacrylate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The consumption of each component of hydroxyl polyester:

[0038]

[0039] Add dihydric alcohol, trihydric alcohol, dibasic acid and monobasic acid into the reaction kettle, reduce pressure and polymerize for 5 hours at a vacuum of 0.02MPa and 180°C, then lower the temperature below 140°C, and add dihydric alcohol and trihydric alcohol , dibasic acid and unit acid total weight 8% xylene, react at 230°C until the acid value of hydroxyl polyester is 18mgKOH / g, cool to 140°C, add xylene to dilute to 70% solid content.

[0040] (2) Hydroxypolyacrylate containing anhydride:

[0041] The consumption of each component of the hydroxyl polyacrylate containing anhydride:

[0042]

[0043]

[0044] Add 50w% organic solvent into the reaction kettle, add the mixture of acrylic acid monomer, initiator and remaining organic solvent dropwise within 3 hours at 120° C., keep it warm for 1 hour; cool down to room temperature to obtain anhydride-containing hydroxyl polyacrylate. ...

Embodiment 2

[0066] The consumption of each component of hydroxyl polyester:

[0067]

[0068] Add diols, triols, dibasic acids and monoacids into the reaction kettle, compress and polymerize under reduced pressure at 0.1MPa and 150°C for 2 hours, then lower the temperature below 140°C, add diols and triols The total weight of dibasic acid and unit acid is 15% xylene, react at 220°C until the acid value is 15mgKOH / g, cool down to 140°C, add xylene to dilute to 70% solid content.

[0069] (2) Hydroxypolyacrylate containing anhydride:

[0070] The consumption of each component of the hydroxyl polyacrylate containing anhydride:

[0071]

[0072]

[0073] Add 80w% organic solvent into the reaction kettle, drop the mixture of acrylic acid monomer, initiator and remaining organic solvent at 135° C. within 3 hours, keep it warm for 1 hour; cool down to room temperature to obtain anhydride-containing hydroxyl polyacrylate.

[0074] (3) Preparation of high solid content polyester modifie...

Embodiment 3

[0094] The consumption of each component of hydroxyl polyester:

[0095]

[0096] Add dihydric alcohol, trihydric alcohol, dibasic acid and monobasic acid into the reaction kettle, reduce pressure and polymerize for 4 hours at a vacuum of 0.08MPa and 160°C, then lower the temperature below 140°C, and add dihydric alcohol and trihydric alcohol , dibasic acid and unit acid total weight 12% xylene, react at 210°C until the acid value of the hydroxyl polyester is 16mgKOH / g, cool to 140°C, add xylene to dilute to 80% solid content.

[0097] (2) Hydroxypolyacrylate containing anhydride:

[0098] The consumption of each component of the hydroxyl polyacrylate containing anhydride:

[0099]

[0100] Add 50w% organic solvent into the reaction kettle, drop the mixture of acrylic acid monomer, initiator and remaining organic solvent at 150° C. within 4 hours, keep it warm for 1 hour; cool down to room temperature to obtain anhydride-containing hydroxyl polyacrylate.

[0101] (3) P...

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Abstract

The invention relates to a polyester modified hydroxyl polyacrylate and to the field of organic polymer compounds; the modified hydroxyl polyacrylate is prepared by a method comprising the following steps of: (1) mixing hydroxyl polyester and anhydride-containing hydroxyl polyacrylate at the weight ratio of 1:(2-4), carrying out reaction at 150-180 DEG C for 1.5-6 hours until the acid value of the polyester modified hydroxyl polyacrylate is less than 15mg KOH / g, and cooling; and (2) distilling for removing a solvent, and adjusting the solid content to be 70-80%, thus obtaining the polyester modified hydroxyl polyacrylate with high solid content. The polyester modified hydroxyl polyacrylate has the advantages of polyester and polyacrylate, and has excellent pigment wetting dispersing performance. Double-component paint prepared by the polyester modified hydroxyl polyacrylate is rapid in drying speed, high in coating hardness and excellent in chemical resistance and weather resistance; the solid content is high, so that the fullness of coating is improved, and the construction cost is saved; and the paint can be used for coating and finishing automobile paint and car refinishing paint, and is also used for plastic paint, leather finishing agent, adhesive agent and ink.

Description

technical field [0001] The invention belongs to the field of organic polymer compounds, and relates to a polymer compound obtained by an esterification reaction and a carbon-carbon unsaturated bond reaction, in particular to a polyacrylate. Background technique [0002] With the enhancement of people's awareness of environmental protection and the improvement of environmental protection regulations, the use of volatile organic compounds (VOC) and harmful air pollutants (HAP) in traditional solvent-based coatings has become more and more restricted, and high-solid coatings have become more and more popular. Much attention. The two-component coating composed of hydroxyl polyacrylate and polyurethane curing agent has excellent weather resistance and chemical medium resistance, and is widely used in the field of high-grade coatings, especially automotive coatings. The hydroxyl polyacrylate currently used in the market has low solid content (40-65%), poor wetting and dispersing ...

Claims

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Application Information

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IPC IPC(8): C08G81/02C08G63/91C08G63/20C08G63/672C08G63/52C08F220/14C08F220/18C08F212/08C08F220/28C08F222/08C09D175/04C08G18/64
Inventor 戴竹先郑曼
Owner YINGDE BOTE CHEM INDAL
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