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Method for modifying cellulose acetate butyrate (CAB) for electro-silvered simulating coating

A technology of acetic acid butyric acid and silver paint, applied in the direction of coating, can solve the problems of increasing the production cost of enterprises, the solvent resistance, hardness and other properties of the coating film are not significantly improved, and the production cost is high, and the solvent resistance performance and hardness can be achieved. Improved effects, less toxicity of reactants, and lower production costs

Active Publication Date: 2012-05-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the main problems of CAB graft modification are as follows: (1) isocyanate prepolymer containing vinyl is highly toxic. When used as a reactant, special protective measures are required in practical applications, and the production cost is relatively high. (2) CAB is modified by the method of polyacrylate or methacrylate monomer in the solution that is dissolved with CAB, the solvent resistance, hardness and other performances of its final coating film do not significantly improve, but the coating film (3) CAB is modified by ATRP method, the modification process is complex, the cost is high and it is not easy to apply to large-scale production in factories; (4) raw material cost of maleic acid ester or fumaric acid ester monomer Higher, which increases the production cost of the enterprise

Method used

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  • Method for modifying cellulose acetate butyrate (CAB) for electro-silvered simulating coating
  • Method for modifying cellulose acetate butyrate (CAB) for electro-silvered simulating coating
  • Method for modifying cellulose acetate butyrate (CAB) for electro-silvered simulating coating

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Nitrogen was passed through the four-necked flask for 5 minutes, 340 parts of xylene was added into the container, and heated while stirring. When the temperature rose to 90°C, 100 parts of dry CAB-381-20 were added into the container (drying is the CAB-381-20 was dried in a vacuum drying oven for 12 hours, the oven temperature was 35°C), and the temperature continued to rise to keep the temperature constant at 145°C. After the CAB was completely dissolved, 28 parts of methyl acrylate and 8 parts of dibutyl A mixed solution of tin oxide and 127.5 parts of xylene was reacted at 145°C for 6 hours, then 267 parts of ethyl acetate and 167 parts of ethylene glycol butyl ether were added, and after the temperature was lowered to 95°C, the following mixture was added dropwise: 167 Parts of methyl methacrylate, 167 parts of ethyl acetate, 100 parts of ethylene glycol butyl ether, 5 parts of dibenzoyl peroxide, and drop them in about 2 hours, and react for 3 hours to get methyl m...

Embodiment 2

[0046]Nitrogen was passed through the container for 5 minutes, and 340 parts of methyl ethyl ketone was added into the container, and heated while stirring. When the temperature rose to 90°C, 100 parts of dry CAB-381-20 were added into the container (drying means CAB- 381-20 was dried in a vacuum drying oven for 4 hours, the oven temperature was 100°C), and the temperature continued to rise to keep the temperature constant at 145°C. After the CAB was completely dissolved, 41 parts of butyl acrylate and 8 parts of triethyltin oxide were added And a mixed solution of 127.5 parts of xylene, after reacting at 145°C for 6 hours, add 267 parts of ethyl acetate and 167 parts of butyl acetate, after lowering the temperature to 95°C, start to drop the following mixture: 167 parts of methacrylic acid Methyl ester, 167 parts of ethyl acetate, 100 parts of ethylene glycol butyl ether, and 5 parts of dibenzoyl peroxide were added dropwise in about 2 hours, and the grafted modified methyl me...

Embodiment 3

[0048] Nitrogen was passed through the container for 5 minutes, and 340 parts of xylene was added into the container, and heated while stirring. When the temperature rose to 90°C, 100 parts of dry CAB-551-0.2 were added to the container, and the temperature continued to rise. Constant at 145°C, after the CAB is completely dissolved, add a mixed solution of 45.3 parts of butyl methacrylate, 8 parts of diethyl tin oxide and 127.5 parts of xylene, react at 145°C for 6 hours, then add 267 parts of acetic acid Ethyl ester and 167 parts of acetone, after lowering the temperature to 95°C, start to add the following mixture dropwise: 167 parts of methyl methacrylate, 167 parts of acetone, 100 parts of ethylene glycol butyl ether, 5 parts of dibenzoyl peroxide, The dropwise addition was completed in about 2 hours, and the methyl methacrylate graft-modified CAB was obtained after 3 hours of reaction. Infrared test was carried out after the CAB of butyl methacrylate transesterification g...

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Abstract

The invention discloses a method for modifying cellulose acetate butyrate (CAB) for electro-silvered simulating coating. The method comprises the following steps of: after introducing inert gas in a container, adding 60-80% of reaction solvent by weight, stirring while heating, adding the CAB below 70-100 DEG C, after completely dissolving, stabilizing at 120-200 DEG C for 5-10 min, adding catalyst, a monomer and remained 20-40% of the reaction solvent, reacting at 120-200 DEG C for 3-15 h, and obtaining the CAB containing unsaturated double bond; and then adding a solvent for coating to dilute the solution, adding a mixture solution of a copolymerization monomer and an initiator in the mixed solution in a dropping manner, and reacting for 2-5 h again to obtain the modified CAB mixed solution for coating. The CAB for the electro-silvered simulating coating modified by using the method disclosed by the invention is high in wearable property of coating film, solvent resistant property and hardness; simultaneously, the metallic feel and the mirror effect of the coating cannot be lost.

Description

technical field [0001] The invention relates to cellulose acetate butyrate, in particular to a method for modifying cellulose acetate butyrate (CAB) used for imitation electroplating silver paint. Background technique [0002] Cellulose acetate butyrate (CAB) is a cellulose organic acid ester additive widely used in effect pigments. It has good water resistance, weather resistance, film-forming flexibility, high transparency and stable metal orientation However, it also has disadvantages such as low hardness, poor scratch resistance, and poor resistance to organic solvents. At present, there are mainly the following methods for modifying CAB: [0003] (1) By reacting vinyl-containing isocyanate prepolymers with residual hydroxyl groups on CAB, and then copolymerizing with vinyl monomers, finally preparing modified UV-curable coatings or CABs for other purposes; [0004] (2) CAB is modified by polymerizing acrylate or methacrylate monomers in a solution in which CAB is diss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/10C08F220/14C08B3/18C09D7/12
Inventor 王晓斌刘维锦
Owner SOUTH CHINA UNIV OF TECH
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