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Preparation method of MMA-BMA-MAA (methyl methacrylate-n-butyl methacrylate-methacrylic acid) ternary copolymer resin

A ternary copolymer resin and molecular weight regulator technology, applied in the direction of coating, can solve the problems of loss, consumption, loss of effectiveness of dispersant, etc., to achieve uniform heat dissipation, improved adhesion, and smooth and controllable reaction.

Active Publication Date: 2013-03-20
WUXI HONGHUI NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the presence of methacrylic acid in the monomers participating in the copolymerization, which is a strong acid substance, it will react with the insoluble dispersant to form water-soluble methacrylate, which not only consumes the methacrylic acid monomer, but also loses its usefulness. Functional group -COOH to improve adhesion, also makes the dispersant lose effectiveness
And using an inorganic disperser, the dispersant needs to be washed away with acid during the post-treatment process, which will generate a lot of waste water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Ingredients: 80 parts of MMA, 20 parts of BMA, 0.8 parts of MAA, 1.2 parts of initiator, 0.8 parts of molecular weight regulator, 1 part of auxiliary dispersant, 8 parts of dispersant and 180 parts of deionized water are used for later use.

[0019] Wherein, the dispersant is polyvinyl alcohol, the auxiliary dispersant is one or more of C6-C14 higher alcohols, the molecular weight regulator is n-dodecanethiol, and the initiator is azobisisobutyronitrile.

[0020] (2) Reaction: Put all the deionized water and dispersant prepared in step (1) into the kettle, start stirring, and raise the temperature to 40°C. All MMA, BMA, MAA, molecular weight regulator and initiator are added into the reactor, and the temperature inside the reactor is kept at 40° C., and stirred for 50 minutes. Afterwards, the temperature was raised to 70°C, and the dispersant was put into the kettle after reacting at this temperature for 45 minutes. After the reaction was continued for 4 hours, the ...

Embodiment 2

[0024] (1) Ingredients: 95 parts of MMA, 5.5 parts of BMA, 1.5 parts of MAA, 1.8 parts of initiator, 2 parts of molecular weight modifier, 2 parts of co-dispersing agent, 7 parts of dispersing agent and 180 parts of deionized water, set aside.

[0025] Wherein, the dispersant is ethyl cellulose, the auxiliary dispersant is one or more of C6-C14 higher alcohols, the molecular weight regulator is n-dodecanethiol, and the initiator is azobisisobutyronitrile.

[0026] (2) Reaction: Put all the deionized water and dispersant prepared in step (1) into the kettle, start stirring, and raise the temperature to 50°C. All MMA, BMA, MAA, molecular weight regulator and initiator are added into the reactor, and the temperature inside the reactor is kept at 50° C., and stirred for 45 minutes. Afterwards, the temperature was raised to 75°C, and after reacting at this temperature for 40 minutes, the dispersant was put into the kettle, and after the reaction was continued for 4 hours, the tempe...

Embodiment 3

[0030] (1) Ingredients: 75 parts of MMA, 25 parts of BMA, 0.5 part of MAA, 2 parts of molecular weight modifier, 0.3 part of initiator, 10 parts of dispersant, 0.5 part of auxiliary dispersant and 250 parts of deionized water, set aside;

[0031] The dispersant is a graft copolymer of polyvinylpyrrolidone and methylcellulose; the molecular weight regulator is n-dodecanethiol; the auxiliary dispersant is one or a mixture of higher alcohols of C6-C14; The initiator is azobisisobutyronitrile.

[0032] (2) Reaction: first add the deionized water and dispersing agent prepared in step (1) into the reaction kettle, start stirring, and raise the temperature to 45°C; put all the initiator, molecular weight regulator, MMA, BMA and MAA into the reactor Put into the reaction kettle, stir at 30-50°C for 30-60 minutes, then raise the temperature to 65°C, react for 70 minutes, add the dispersant to the kettle, and continue the reaction for 4 hours. Then the temperature was raised to 78°C fo...

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Abstract

The invention relates to a preparation method of MMA-BMA-MAA (methyl methacrylate-n-butyl methacrylate-methacrylic acid) ternary copolymer resin, and particularly relates to a method for preparing MMA-BMA-MAA ternary copolymer resin. The method comprises the following steps of: adding deionized water and an auxiliary dispersing agent into a reaction kettle, starting stirring, and heating; adding an initiator, a molecular weight regulator, MMA, BMA and MAA into the reaction kettle, and stirring and heating; after the reaction, adding a dispersing agent into the reaction kettle; continuing the reaction and heating; and washing and sieving to obtain the product ternary copolymer resin. According to the method provided by the invention, by introducing MMA into a polymer molecular chain, the adhesion between a high-paint film and various base materials can be increased; and meanwhile, since the MAA has a similar structure with the MMA and the BMA, a copolymerization reaction easily happens.

Description

technical field [0001] The invention relates to a preparation method of MMA-BMA-MAA terpolymer resin, in particular to a method for preparing methyl methacrylate-n-butyl methacrylate-methacrylic acid terpolymer resin. Background technique [0002] In the prior art, homopolymerization and copolymerization resins of methacrylate monomers are mostly synthesized by bulk method, solution method and suspension polymerization method using insoluble inorganic salt powder as dispersant. [0003] Using bulk polymerization, the mixture of monomers and various additives is put into the reactor at one time, but as the reaction progresses, the viscosity of the system increases, the heat released by the reaction cannot be discharged in time, and implosion easily occurs. The obtained product is block or plate, and when it is used as ink, coating, etc., it needs to be pulverized and granulated to obtain the final product. Therefore, the bulk polymerization process is complex, difficult to c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/18C08F220/06C08F2/20C09D133/12
Inventor 李川项洪伟申淑婷郭运华
Owner WUXI HONGHUI NEW MATERIALS TECH
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