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Modified chlorinated polyolefin resin and preparing method thereof

A technology of chlorinated polyolefin and chlorinated polyethylene, which is applied in the field of modified synthetic resin and its preparation, can solve the problems of poor weather resistance, unstable coating adhesion performance, low polyolefin content, etc., and achieves a simple preparation method, Good adhesion and water resistance, easy industrialization effect

Inactive Publication Date: 2008-09-10
CHANGZHOU HIGH TECH RES INST OF NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polyolefin content in this type of resin is low, generally not more than 10%, and the resulting coating has unstable adhesion and poor weather resistance. Generally, it can only be used for low-grade polyolefin surface coating, and is not suitable for the main parts of the automotive industry. large scale painting

Method used

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  • Modified chlorinated polyolefin resin and preparing method thereof
  • Modified chlorinated polyolefin resin and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In a 1000ml four-necked bottle equipped with stirring, a thermometer, and a condenser tube, add 150 g of chlorinated polypropylene (atactic body, chlorine content 30%), and 445 g of xylene, slowly heat up to 80° C. to fully dissolve the material, and heat up to 120° C. ℃, add maleic anhydride 30g, methyl methacrylate 100g, cyclohexyl methacrylate 20g, allyl triethoxysilane 3.5g, benzoyl peroxide 0.3g and 1.5g tert-butyl peroxide Afterwards, the reaction was stirred for 15 hours. Cool down, filter and fill.

[0024] Add appropriate amount of alkyd resin, anatase titanium dioxide, calcium carbonate, superfine talcum powder, solvent, auxiliary agent, etc. to the obtained resin according to the formula in Table 1 (except modified chlorinated polyolefin resin, all other raw materials are is a commercially available product), after high-speed dispersion and grinding to a fineness of less than 30 μm, after spraying and molding, after baking at 80°C for 2 hours, the performanc...

Embodiment 2

[0028] The method is the same as in Example 1, except that the chlorinated polypropylene (random body, chlorine content 30%) is replaced by an equal weight of low-molecular-weight polypropylene wax.

Embodiment 3

[0030] In a 1000ml four-necked bottle equipped with stirring, a thermometer, and a condenser tube, add 150 g of chlorinated polypropylene (atactic body, chlorine content 30%), and 420 g of xylene, slowly heat up to 80° C. to fully dissolve the material, and heat up to 120° C. ℃, add maleic anhydride 30g, methyl methacrylate 80g, cyclohexyl methacrylate 20g, glycidyl methacrylate 20g, dioxane 25g, allyl triethoxysilane 3.5g and peroxide After 0.3 g of benzoyl and 1.5 g of benzoyl peroxide, the reaction was stirred for 15 hours. Cool down, filter and fill. The following operations are exactly the same as in Example 1. The resulting resin is poured into acetone and precipitated to obtain a white precipitate, which is filtered by suction and fully washed 3 times with acetone. After vacuum drying, the graft sample is obtained, and its infrared spectrum (Shimadzu FTIR-8300 type Fourier transform infrared spectrometer )see picture 1. It can be seen that the absorption peak at 1714...

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Abstract

The invention discloses a modified chlorinated polyolefine resin which is obtained through the reaction of chlorinated polyolefine, maleic acid anhydride, vinyl monomer and silicane coupling agent containing unsaturated double bond according to the weight ratio of 1:0-0.5:0.1-2:0.003-0.15; meanwhile, the modified chlorinated polyolefine resin adopts a chlorinated polyolefine long chain as a framework; moreover, the tertiary carbon position or the secondary carbon position of the chlorinated polyolefine are grafted with vinyl monomer or / and maleic acid anhydride or / and silicane coupling agent. The modified chlorinated polyolefine resin, which has excellent adhesive quality, water resistance and simple preparation method, is easy to realize industrialization.

Description

technical field [0001] The invention relates to a modified synthetic resin that can be used for coatings and adhesives and a preparation method thereof, in particular to a modified chlorinated polyolefin resin and a preparation method thereof. Background technique [0002] Polyolefins are a common plastic material and account for the largest amount of plastic produced globally. With the rapid development of the automobile industry, new materials for automobiles are developing in the direction of light weight, intensification and ecology. Polyolefin alloy materials have the advantages of excellent mechanical properties, easy molding, small specific gravity, low price, and reusability. Typical automotive parts (bumpers, dashboards, interior parts, etc.) are widely using this type of new material. In order to meet this important change in the automotive industry, the surface coating of polyolefin materials needs to be changed and improved accordingly. Due to the low surface e...

Claims

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Application Information

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IPC IPC(8): C08F255/02C08F4/32C08F8/42C08K5/54
Inventor 陈强金加洪谈国华汤向南汤红仙孙小强
Owner CHANGZHOU HIGH TECH RES INST OF NANJING UNIV
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