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Low-surface energy silicon propyl benzene phenylpropane triblock copolymer material and manufacture method thereof

A technology of triblock and block copolymers of silicyl propylene benzene, applied in the field of copolymers, can solve the problems of difficult separation and purification, can not contain oxygen and water, high purity requirements, etc., and achieves narrow molecular weight distribution, less side reactions, Effects of mild reaction conditions

Inactive Publication Date: 2008-08-20
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method for synthesizing this type of polymer by anionic polymerization mainly has the following disadvantages: 1. Anionic polymerization requires high purity of the reaction system, not only the system cannot contain oxygen and water, but even other impurities have a greater impact on the reaction , so there is a high requirement for purification
2. There are many anionic polymerization side reactions of acrylates, and it is difficult to separate and purify after the reaction

Method used

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  • Low-surface energy silicon propyl benzene phenylpropane triblock copolymer material and manufacture method thereof
  • Low-surface energy silicon propyl benzene phenylpropane triblock copolymer material and manufacture method thereof
  • Low-surface energy silicon propyl benzene phenylpropane triblock copolymer material and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Under the protection of nitrogen atmosphere, react 1 part of monomethanol-terminated polydimethylsiloxane, 1.5 parts of 2-bromoisobutyryl bromide and 2.5 parts of triethylamine at 0°C. Then the above solution was stirred and reacted for 30 hours. After the reaction was completed, it was filtered, and the filtrate was distilled off under reduced pressure to remove the solvent, and then dissolved in dichloromethane, washed several times with saturated sodium bicarbonate solution, separated, and the organic layer was Use anhydrous magnesium sulfate to dry and remove water, then filter, and finally the filtrate is distilled off under reduced pressure to remove the methylene chloride solvent to obtain an oily yellow macromolecular initiator;

[0023] 2) The reaction system must be strictly deoxygenated, using 1 part of macromolecule as initiator, 1 part of cuprous bromide as catalyst, and 2 parts of N-(n-propyl)-2-pyridinemethanamine as catalyst ligand React with 10 parts...

Embodiment 2

[0026]1) Under the protection of argon atmosphere, react 1 part of monomethanol-terminated polydimethylsiloxane, 1.8 parts of 2-bromoisobutyryl bromide and 2.8 parts of triethylamine at 10°C. Then the above solution was stirred and reacted for 20 hours. After the reaction was completed, it was filtered, and the filtrate was distilled off under reduced pressure to remove the solvent, and then dissolved in dichloromethane, washed several times with saturated sodium bicarbonate solution, separated, and the organic layer was Use anhydrous magnesium sulfate to dry and remove water, then filter, and finally the filtrate is distilled off under reduced pressure to remove the methylene chloride solvent to obtain an oily yellow macromolecular initiator;

[0027] 2) Except that the ligand is 1,1,4,7,7-pentamethyldivinyltriamine, the monomer is 20 parts, and the reaction temperature is 50° C., the others are the same as 2) in Example 1;

[0028] 3) Except that the reaction temperature is ...

Embodiment 3

[0030] 1) with embodiment 1 in 1);

[0031] 2) Except that the monomer is 30 parts, other is the same as 2) in Example 2;

[0032] 3) Except that the reaction temperature is 70° C. and the ligand is 1,1,4,7,7-pentamethyldivinyltriamine, the others are the same as 3) in Example 2.

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Abstract

A triblocked low surface energy silicon propyl benzene copolymer material and a preparation method thereof relate to a copolymer. The invention provides a triblocked low surface energy silicon propyl benzene copolymer material and the preparation method thereof which have mild reaction conditions and definite structure of reaction product, preserve the original skeleton structure of each block, and are simple in operation. The triblocked low surface energy silicon propyl benzene copolymer is dimethylsiloxane-b-polyethyl methacrylate-b-polystyrene. First, dimethylsiloxane macro-initiator with the end sealed by bromine atoms is prepared; then diblocked dimethylsiloxane-b-polyethyl methacrylate polymer macro-initiator is prepared, at last, novel triblocked dimethylsiloxane-b-polyethyl methacrylate-b-polystyrene copolymer is prepared.

Description

technical field [0001] The invention relates to a copolymer, in particular to a novel low surface energy silicate triblock copolymer material and a preparation method thereof. Background technique [0002] Copolymers containing polydimethylsiloxane blocks and polyacrylate blocks are rarely reported. Such polymers can be synthesized by anionic polymerization. During the polymerization process, attention must be paid to the use of polydimethylsiloxane The alkane block initiates the polymerization of acrylate monomers, otherwise it cannot be polymerized. The synthesis of low surface energy silicone block copolymers (polydimethylsiloxane-b-polyethylmethacrylate-b-polystyrene) has not been reported so far. Acrylic resin has the advantages of excellent heat resistance, weather resistance, corrosion resistance, stain resistance, high adhesion and good color and gloss retention, but in practical applications, there are still some shortcomings due to the limitations of its own struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F293/00
Inventor 罗正鸿何腾云于海江
Owner XIAMEN UNIV
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