Title:
METHYL METHACRYLATE POLYMER
Document Type and Number:
Japanese Patent JPS572309
Kind Code:
A
Abstract:
PURPOSE: The titled polymer of high purity, obtained by polymerizing methyl methacrylate without using a chain transfer agent, and suitable for a resist resin having improved resolving power.
CONSTITUTION: A monomer (mixture) consisting of methyl methacrylate and a comonomer, e.g. acrylic acid, at a weight ratio betwen the methyl methacrylate and the comonomer of 100W70/0W30 is polymerized in a polar solvent, e.g. dimethylformamide, without using a chain transfer agent to give a polymer having a weight- average molecular weight of 300,000W800,000, a dispersity ≤4 and preferably a decomposition ratio by the X-ray irradiation ≥0.0001.
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Inventors:
SUGIMORI TERUHIKO
TAJIRI TAKAYUKI
KAWAMURA TOMIHIKO
SUEKI MASAYA
TAJIRI TAKAYUKI
KAWAMURA TOMIHIKO
SUEKI MASAYA
Application Number:
JP7582780A
Publication Date:
January 07, 1982
Filing Date:
June 05, 1980
Export Citation:
Assignee:
MITSUBISHI RAYON CO
International Classes:
C08F2/00; C08F2/04; C08F2/06; C08F20/00; C08F20/10; C08F20/14; (IPC1-7): C08F2/06; C08F20/14
Next Patent: PREPARATION OF COPOLYMER