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Alkyd acrylic graft copolymer and preparation method thereof

A technology of alkyd acrylic acid and graft copolymer, applied in application, coating, ink, etc., can solve the problems of material performance deterioration and achieve good weather resistance, good color retention, and good luster

Inactive Publication Date: 2012-10-24
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the resin has poor compatibility due to differences in molecular weight or functional group structure, although it can be uniformly dispersed under the action of a solvent, during the curing and molding process, as the amount of solvent in the system decreases, different types of resins will show phase separation. material performance deterioration

Method used

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  • Alkyd acrylic graft copolymer and preparation method thereof
  • Alkyd acrylic graft copolymer and preparation method thereof
  • Alkyd acrylic graft copolymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1. The preparation of alkyd resin

[0032] In a 500ml four-necked flask equipped with a stirring device, an oil-water separator and a thermometer, 60g of soyoleic acid, 17.54g of pentaerythritol, and 1.65g of benzoic acid were successively added, protected by nitrogen gas, stirring and condensed water were started, and the temperature was raised to 180°C within 1h (wherein When the temperature reaches 120°C, add 3g of xylene); when the temperature reaches 180°C, start to keep warm, keep the heat for 40 minutes, and control the temperature at 180-200°C; add 8.27g of phthalic anhydride, 0.27g of maleic anhydride and 5.46g of xylene, and add the rest after 10 minutes 8.27g phthalic anhydride and 0.27g maleic anhydride; raise the temperature to control the temperature at 210-220°C, and keep it for 1 hour; continue to raise the temperature to control the temperature at 220-230°C, and start measuring the acid value after holding it for 1 hour; start when the acid va...

Embodiment 2

[0033] Embodiment 2. Preparation of alkyd acrylic acid graft copolymer

[0034] Dissolve 9.6g of alkyd resin in 0.9g of acrylic acid, 10.7g of methyl methacrylate, 10g of styrene, and 15.6g of butyl acrylate to obtain a copolymer mixed monomer; Add 30g xylene and 4.68g mixed monomer in the three-necked flask, start to stir and heat up to reflux state, keep warm for 30min; then dissolve 0.216g of initiator in the remaining mixed monomer to obtain mixed monomer containing initiator, add Dropping funnel; drop the mixed monomer containing the initiator, drop it in 120-150 minutes, keep warm for 30-60 minutes after dropping; dissolve 0.024g initiator in 30g xylene, add it to the dropping funnel, drop it, After 45-60 minutes, the dripping is completed; the reaction is kept for 2 hours, and the temperature is lowered to obtain the alkyd-acrylic acid graft copolymer.

[0035] Table 1 shows the performance test results of alkyd-acrylic graft copolymer paints.

[0036] Table 1: Perf...

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Abstract

The invention relates to an alkyd acrylic graft copolymer and a preparation method thereof. According to the invention, high-molecular alkyd resin with main chain containing unsaturated double bond is synthesized through molecular design. The copolymer comprises the components of: soybean oil acid 55%-65%, pentaerythritol 17%-19%, maleic anhydride 1.07%-1.24%, phthalic anhydride 15.54%-17.92%, xylene 7.5%, and benzoic acid 1.55%-1.79%. Synthesized alkyd resin is subjected to free radical graft copolymerization with acrylic monomer, such that the alkyd acrylic graft copolymer is obtained. The copolymer monomer comprises the components of: acrylic acid 0.2%-0.9%, methyl methacrylate 2.7%-10.1%, styrene 2.6%-9.5%, butyl acrylate 4.0%-14.8%, alkyd resin 9.0%-35.0%, an initiator 0.15%-0.30%, and xylene 60.0%.

Description

technical field [0001] The present invention relates to polymer chemistry and polymer technology. Background technique [0002] The main varieties of high polymers used in coatings and inks are: alkyd resin, acrylic resin, phenolic resin, epoxy resin, polyurethane resin, amino resin and their mutual modification. These resins have been widely used in coating inks, and have achieved great success in construction, ships, steel structures, wood and automobiles due to their excellent performance. There will always be some inherent defects due to the limitation of the structure, so in practical applications, the matrix resin for coating inks is often modified to improve material properties. [0003] Alkyd resin exhibits excellent film-forming properties due to its low relative molecular weight before curing to form a film, which makes the coating film after curing to have a very high gloss, and it can be made into a one-component coating, which is easy to apply and widely used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/01C08F220/06C08F220/14C08F212/08C08F220/18C08G63/52C08G63/49C09D151/08C09D11/00
Inventor 周应萍杨保平崔锦峰郭军红李延华李军吴纯倾彩霞陈碧碧崔卓魏小赟
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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