Antistatic resin composition
AssigneeKureha Kagaku Kogyo Kabushiki Kaisha
InventorsAkio Kobayashi, Takayuki Katto
Life of this patent
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Abstract
A graft copolymer is obtained by graft-polymerizing an ethylenically unsaturated monomer onto a rubber trunk polymer which is a copolymer of a polyalkylene oxide monomer comprising 4 to 500 alkylene oxide groups together with an ethylenic unsaturation, and a conjugated diene and/or an alkyl acrylate. By adding an anionic surfactant to a base resin which comprises this graft copolymer alone or a mixture of this graft copolymer and another thermoplastic resin, an antistatic resin composition can be obtained. The resin composition thus obtained possesses excellent and permanent antistatic property that is not lowered by washing or wiping as is the case with conventional antistatic resins comprising an antistatic agent.
Claims9
An antistatic resin composition comprising:
- (1) 100 parts of a base resin;
- and
- (2) 0.1 to 5 parts of an anionic surfactant,
- said base resin comprising
- (A) 7 to 100 parts of a graft copolymer obtained by graft-polymerizing 5 to 95% of at least one ethylenically unsaturated monomer onto 5 to 95% of a rubber trunk polymer which in turn is a copolymer of
- (i) 30 to 90% of an elasticity-imparting monomer selected from the group consisting of conjugated dienes, alkyl acrylates and mixtures thereof,
- (ii) 10 to 70% of a polyalkylene oxide monomer which is a monomer comprising 4 to 500 alkylene oxide groups together with an ethylenic unsaturation, and
- (iii) 0 to 50% of at least one ethylenically unsaturated monomer copolymerizable with the elasticity-imparting monomer, and
- (B) 0 to 93 parts of a thermoplastic resin compatible with said graft copolymer (A),
- said rubber trunk polymer being 5 to 80% of the total of the graft copolymer (A) and the thermoplastic resin (B),
- all quantities expressed in parts and percentages being by weight.
Dependencies are inferred from the claim text.