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Chlorinated-polypropylene-modified fluorine-containing acrylic resin and preparation method thereof

A technology of chlorinated polypropylene and acrylic resin, applied in the direction of coating, etc., can solve the problems of limited application range, low cohesion and bonding strength, monotonous color, etc., and achieve the effect of being environmentally friendly, excellent performance and superior performance

Active Publication Date: 2014-03-05
HUANGSHAN JINZHILI SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned method for modifying chlorinated polypropylene has poor solubility of the modified product due to the low grafting rate and low chlorine content. It still needs to use benzene, toluene, Benzene-containing solvents such as xylene; and, therefore, limit its scope of application
On the other hand, although chlorinated polypropylene with a high degree of chlorination can be well dissolved by some ketone ester solvents, benzene solvents are not used in its use, but its cohesion and bonding strength are low, and it is suitable for various plastic materials. The adhesion is small, so it is not an excellent plastic coating binder in many occasions, but it is mainly used as a substitute for chlorinated rubber
[0004] With the development of the automobile industry, the weight of automobiles tends to be lighter, so plastic parts of various materials are applied to automobiles, especially the interior of automobiles such as cab dashboards, door inner panels, and seats. They are all made of plastic products, but when plastic products are molded and processed, they will have defects such as uneven color, monotonous color, mottled defects, etc., and are prone to problems such as aging and brittleness, scratches, contamination, and static electricity. Coating is essential, and its coating adhesion is a major obstacle restricting the development of plastic coatings

Method used

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  • Chlorinated-polypropylene-modified fluorine-containing acrylic resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Chlorinated polypropylene modified acrylic resin is composed of the following raw materials by mass percentage:

[0034] Chlorinated polypropylene: 7%;

[0035] The solvent composed of cyclohexane, methylcyclohexane, butyl acetate and butanone according to the mass percentage of 1:1:1:1: 45%;

[0036] Benzoyl peroxide: 1%;

[0037] Mixed monomer: 47%;

[0038] Wherein, the mixed monomer includes the following components, by mass percentage of the mixed monomer: styrene 6%; butyl acrylate 9%; acrylic acid 2%; methyl methacrylate 30%; butyl methacrylate 11% ; Isobutyl methacrylate 20%; Isooctyl methacrylate 2%; Hexafluorobutyl acrylate 10%; Hydroxyethyl methacrylate 10%.

Embodiment 2

[0040] Chlorinated polypropylene modified fluorine-containing acrylic resin is composed of the following raw materials in mass percentage:

[0041] Chlorinated polypropylene: 4.6%;

[0042] The solvent composed of cyclohexane, methylcyclohexane, butyl acetate and butanone according to the mass percentage 1:1:1:1: 60%;

[0043] Di-tert-amyl peroxide: 0.4%;

[0044] Mixed monomer: 35%;

[0045] Wherein, the mixed monomer includes the following components, by mass percentage of the mixed monomer: styrene 2%; butyl acrylate 4%; acrylic acid 1%; methyl methacrylate 27%; butyl methacrylate 20% 20% isobutyl methacrylate; 6% isooctyl methacrylate; 10% hexafluorobutyl methacrylate; 10% hydroxyethyl methacrylate.

Embodiment 3

[0047]Polymerization reaction: add 60 grams of chlorinated polypropylene to a four-necked flask, and prepare a total of 500 1 g of solvent, first add 70% of the amount that is 350 g, then heat to 100 ° C, stir until the chlorinated polypropylene is completely dissolved. Styrene, butyl acrylate, acrylic acid, methyl methacrylate, butyl methacrylate, isobutyl methacrylate, isooctyl methacrylate, hexafluorobutyl methacrylate, hydroxyethyl methacrylate 356 grams of mixed monomers composed of esters by mass percentage and 9.8 grams of benzoyl peroxide (total benzoyl peroxide is 14 grams) are mixed in advance, and polymerized by adding the reaction system evenly into the four-necked flask for 4 hours reaction. After the dropwise addition, keep warm for 1 hour, then mix the remaining 30% solvent (150 g) and 30% BPO (4.2 g) in advance, add three more times, keep warm for 2 hours each time. The entire reaction temperature is kept between 100°C and 110°C until the pH value of the resi...

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Abstract

The invention provides a chlorinated-polypropylene-modified fluorine-containing acrylic resin composed of chlorinated polypropylene, solvent, initiator and monomer mixture and a preparation method thereof, and application of the chlorinated-polypropylene-modified fluorine-containing acrylic resin as automobile internal decoration paint. The fluorine-containing acrylic resin modified by CPP (chlorinated polypropylene) has favorable properties, and especially has superior properties in the aspects of weather resistance, wear resistance, pollution resistance, scour resistance, adhesive force and the like. The chlorinated-polypropylene-modified fluorine-containing acrylic resin is free of benzene compounds or heavy metals, thus, is safe for the human body and friendly for the environment, and is suitable for preparing automobile interior decorations and other products in direct contact with the human body.

Description

technical field [0001] The invention relates to the technical field of coating chemical industry, in particular to a chlorinated polypropylene modified fluorine-containing acrylic resin used for automotive interior coatings and a preparation method thereof. Background technique [0002] Chlorinated polypropylene is a thermoplastic resin produced by modifying polypropylene through chlorination reaction. It has good chemical stability, wear resistance, aging resistance and acid resistance, and has good properties for polyolefin materials such as polypropylene and polyethylene. Good bonding performance, so it is widely used in the coating industry. However, chlorinated polypropylene with a low chlorination degree has low polarity, and has defects such as poor miscibility with other coating resins, low cohesion and bonding strength, and low adhesion with the topcoat, so it is necessary to Polar groups were introduced to improve the polarity of chlorinated polypropylene. At pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F255/02C08F220/14C08F220/18C08F220/28C08F220/22C08F220/06C08F212/08C09D151/00C09D7/12
Inventor 郑新凯蔡国强朱龙观
Owner HUANGSHAN JINZHILI SCI & TECH