Rubber-shaped polymer for electronic material and production method thereof

An electronic material and rubber-like technology, which is applied in the field of rubber-like polymers for electronic materials and its manufacturing, can solve problems such as instability and limited manufacturing conditions, achieve high heating coagulation, inhibit corrosion, and improve thermal stability Effect

Inactive Publication Date: 2009-03-18
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, the emulsion polymerization temperature and the temperature at the time of monomer recovery must be lower than the cloud point of the above-mentioned nonionic surfactant, which has the problem of limited manufacturing conditions.
In addition, the (co)polymer latex has a problem that it is usually unstable due to high temperature in the monomer recovery process.

Method used

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  • Rubber-shaped polymer for electronic material and production method thereof
  • Rubber-shaped polymer for electronic material and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Synthesis of Rubbery Polymer (A-1):

[0066] The following substances were put into the autoclave: 10 parts of polyoxyethylene isodecyl ether (manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd., trade name: SD-110) and dodecylbenzenesulfonate were dissolved in 200 parts of water as an emulsifier. An aqueous solution (aqueous solution of an emulsifier) ​​of 2 parts of sodium bicarbonate (manufactured by Kao Corporation, trade name: Neopelex G-25); 75 parts (74.6 mol %) of butadiene and 25 parts (25.4 mol %) of acrylonitrile as raw material monomers %); 0.2 parts of tert-dodecyl mercaptan as a molecular weight regulator; and a redox catalyst, after adjusting the temperature to 10°C, add 0.01 part of terpane hydroperoxide as a polymerization initiator, and carry out emulsion polymerization until polymerization The conversion rate was 75%. The HLB of polyoxyethylene isodecyl ether (SD-110) used was 15.5, and the cloud point of the 1.0 mass % aqueous solution was 80 deg...

Embodiment 3

[0076] Synthesis of Rubbery Polymer (A-3):

[0077] Except using 60 parts (81.4 mol %) of butadiene and 40 parts (18.6 mol %) of hydroxybutyl methacrylate as raw material monomers, all the other carry out in the same manner as in Example 1, synthesize and isolate the rubbery polymer ( A-3). Measure the viscosity of rubbery polymer (A-3) with Mooney tester, the result is 75ML 1+4 (100°C). In addition, when the content of alkali metal ions contained in the rubbery polymer (A-3) was analyzed using an atomic absorption photometer, Na: 22 ppm, K: 10 ppm, and Ca: 1 ppm. Furthermore, the polymerization stability evaluation was 1.3%, the stability at the time of monomer recovery was 3.4%, and the coagulation evaluation was 89%, all of which were good. The results are shown in Table 1.

Embodiment 4

[0079] Synthesis of Rubbery Polymer (A-4):

[0080] Except using 60 parts of butadiene (79.9 mole %), 35 parts of hydroxybutyl methacrylate (15.9 mole %) and 5 parts of methacrylic acid (4.2 mole %) as raw material monomers, all the others are the same as in Example 2 Carried out, the rubbery polymer (A-4) was synthesized and isolated. Measure the viscosity of rubbery polymer (A-4) with Mooney tester, the result is 77ML 1+4 (100°C). In addition, when the content of alkali metal ions contained in the rubbery polymer (A-4) was analyzed using an atomic absorption photometer, Na: 19 ppm, K: 8 ppm, and Ca: 1 ppm. Furthermore, the polymerization stability evaluation was 1.0%, the stability at the time of monomer recovery was 3.2%, and the coagulation evaluation was 90%, all of which were good. The results are shown in Table 1.

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Abstract

The invention provides a rubber-type polymer for electronic material and manufacturing method thereof. The manufacturing method includes steps of using a surfactant as an emulsifying agent to carry emulsion polymerization and heating obtained polymer latex under the existence of electrolyte. The surfactant represented by a general formula (1) has HLB of 13.5 to 17.0 and cloud point of 1.0 mass% water solution more than 70 DEG C. In the general formula (1), R represents aliphatic alkyl of C8-C12, and n represents ethylene oxide average condensation number of 5-20. The manufacturing method of the present invention has advantages of excellent stability in polymerization process, high yield and low metal content.

Description

technical field [0001] The present invention relates to a method for producing a rubber-like polymer for electronic materials and a rubber-like polymer for electronic materials. A method for producing a rubbery polymer for electronic materials containing a rubbery polymer for electronic materials with a low content, and a rubbery polymer for electronic materials produced by the method for producing a rubbery polymer for electronic materials. Background technique [0002] Conventionally, anionic surfactants containing alkali metals as counter ions have been widely used as emulsifiers used in the production of (co)polymers by emulsion polymerization, and in the process of isolating the produced (co)polymer latex, Metal compounds such as sodium chloride and calcium chloride are used as coagulants. Therefore, metal ions remain in the obtained polymer, and it is difficult to obtain a polymer with a low metal ion content. [0003] Therefore, when using polymers obtained by usual...

Claims

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Application Information

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IPC IPC(8): C08F236/06C08F2/30C08F6/22
CPCC08C1/15C08F2/24C08F236/06
Inventor 西冈隆浅野重人
Owner JSR CORPORATIOON
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