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Modified acrylic resin as well as paint and application thereof

A technology of acrylic resin and isobornyl methacrylate, applied in the direction of coating, chemical recycling, etc., can solve the problems of damage to the performance of paint film, difficult to control the grafting process and grafting rate, inapplicability, etc., and achieve fast drying speed. , reduce the amount of catalyst, good water resistance

Active Publication Date: 2013-05-08
常州市弘可利办公用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to limitations in construction, appearance and performance during actual use, these resins or coatings are not applicable because they are directly applied by adding CPP
Chinese invention patent ZL01137350.4, as well as the technical solutions disclosed in Chinese invention patent applications 200610033534.X and 201010135492.7 all use acrylate monomers or other vinyl monomers to graft and modify chlorinated polyolefins (CPO). The grafting modification process is an addition polymerization in which free radicals capture the active hydrogen on CPO, but the grafting process and grafting rate are difficult to control, and accompanied by a large number of side reactions of copolymerization of acrylate monomers, the resin system sometimes becomes Heterogeneity, damage to paint film performance, etc.

Method used

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  • Modified acrylic resin as well as paint and application thereof
  • Modified acrylic resin as well as paint and application thereof
  • Modified acrylic resin as well as paint and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of Embodiment 1 Modified Acrylic Resin

[0036] First exhaust the air in the reaction system, pass inert gas, first dissolve the chlorinated polypropylene and half of the solvent at 75°C, and then put the catalyst, monomer, reducing agent, ligand, etc. into the reaction kettle, Stir the reaction at 75° C. for 10-25 h, and detect the conversion rate of the double bond by 1H-NMR nuclear magnetic resonance. If it reaches more than 80%, it is the end point of the reaction. After cooling down, diluting and discharging, the modified acrylic resin is obtained. The appearance of the obtained resin is light yellow transparent viscous liquid, the solid content is about 49.5%, and the viscosity is about 3000mPa·s (NDJ-1 rotational viscometer, 25°C) .

[0037] According to the above method, each component listed in Table 1 and its dosage (the values ​​in the table are parts by weight) were weighed and mixed respectively, and the polymerization reaction was carried out ...

Embodiment 2

[0044] The preparation of embodiment 2 polypropylene plastic paint primer

[0045] Carry out batching preparation polypropylene plastic paint primer according to table 3.

[0046] table 3

[0047]

[0048] The mixed solvent in this embodiment is the general skill of those of ordinary skill in the art. The solvent type and proportion are adjusted according to the use environment and equipment conditions. Solvents include but are not limited to, toluene, xylene, butyl acetate, ethyl acetate, methyl ethyl ketone , butanone and cyclohexanone or one or more.

[0049] The solid content of the paint is (55±2)%, and the viscosity is (60-120)s (coating -4, 25°C).

[0050] The paint of the present invention is sprayed on the surface of polypropylene or modified polypropylene plastic and used as a primer, and the polyurethane topcoat can be resprayed to meet the specified performance requirements. First, spray the primer on the polypropylene plastic workpiece that has been wiped, l...

Embodiment 3

[0053] The preparation of embodiment 3 polypropylene plastic paint finish

[0054] Prepare polypropylene plastic paint topcoat according to Table 5

[0055] table 5

[0056]

[0057] The mixed solvent in this embodiment is the general skill of those of ordinary skill in the art. The solvent type and proportion are adjusted according to the use environment and equipment conditions. Solvents include but are not limited to, toluene, xylene, butyl acetate, ethyl acetate, methyl ethyl ketone , butanone and cyclohexanone or one or more.

[0058] Coating solid content (61±2)%, viscosity (60-120)s (coating -4, 25 ℃).

[0059] The paint of the invention is directly sprayed on the surface of polypropylene or modified polypropylene plastic, and used as a single-coat topcoat to meet specified performance requirements. First, spray polypropylene plastic paint topcoat on the polypropylene plastic workpiece that has been wiped, level it for 10-15 minutes, bake it at 80°C for 30 minutes...

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Abstract

The invention provides a modified acrylic resin, which is prepared by activators regenerated by electron transfer-atom transfer radical polymerization (ARGET-ATRP) from chlorinated polyolefin, dimethylamino ethyl methacrylate and vinyl monomer. According to the invention, an atom transfer radical polymerization method is adopted, thus the defects of randomness, uncontrollable graft ratio and the like of traditional radical polymerization are overcome; and activators regenerated by electron transfer are adopted, thus the use amount of the catalyst is reduced by scores of ppm of a system and the complicated filtering and washing process of large-use-amount catalyst and ligand after reaction in traditional ATRP reaction is omitted. The prepared resin has good performances, such as high drying rate, good adhesion, good water resistance; and the paint prepared from the resin has the characteristics of good adhesion, good water resistance, salt mist resistance, moist heat resistance, temperature change resistance and the like, and can be used as primer and single-pass finishing coat.

Description

technical field [0001] The present invention relates to a kind of acrylic resin, relate in particular to a kind of modified acrylic resin, utilize the electron transfer regenerative catalyst atom transfer radical polymerization (ARGET-ATRP) of low catalyst consumption to obtain, and this kind of resin is used for polypropylene plastic coating Primer and polypropylene plastic paint one-coat topcoat. Background technique [0002] Various polyolefin resins represented by polypropylene have the characteristics of low density, excellent mechanical properties and low price, and are widely used in automotive parts, such as: polypropylene bumper 1K bases launched by major automotive coating manufacturers paint. However, unlike polar resins such as acrylic resins, epoxy resins, and polyester resins, polyolefin resins are non-polar resins and have crystallinity, so there are problems such as difficulty in coating and bonding. [0003] In order to solve this problem, chemical oxidati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F255/02C08F220/14C08F212/08C08F220/34C09D151/06C09D7/12
CPCY02P20/584
Inventor 包柏青徐金龙
Owner 常州市弘可利办公用品有限公司
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