Process for producing thermoplastic graft copolymer resin containing nitrile

Patent 4563505 Issued on January 7, 1986. Estimated Expiration Date:

September 14, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Process for producing thermoplastic resin Patent #: 4112021
Issued on: 09/05/1978
Inventor: Shima , et al.

Inventors

Assignee

Japan Synthetic Rubber Co., Ltd.

Application

No. 06/532068 filed on 09/14/1983

US Classes:

525/316, Ethylenic reactant is an aromatic hydrocarbon525/308, Ester is derived from an unsaturated carboxylic acid525/67, With solid polymer derived from at least one hal-C(=O)-hal, O-C(=O)-O or hal-C(=O)-O- reactant wherein at least one of the reactants forming the solid polymer is saturated; or with SPFI wherein at least one of the necessary ingredients is a hal-C(=O)-hal, O-C(=O)-O, or hal-C(=O)-O containing reactant or reaction product thereof; or with a SICP containing a hal-C(=O)- or O-C(=O)-O- group525/68, With solid polymer derived from at least one phenolic reactant wherein at least one of the reactants forming the solid polymer is saturated; or with SPFI wherein at least one of the necessary ingredients is a phenolic reactant or with a reaction product thereof; or with phenolic-containing SICP525/86Mixture contains solid polymer derived from nonaromatic reactant containing plural ethylenically unsaturated groups

Examiners

Primary: Briggs, Sr., Wilbert J.

Attorney, Agent or Firm

Oblon, Fisher, Spivak, McClelland & Maier

International Classes

C08F 279/04 (20060101)
C08F 285/00 (20060101)
C08F 279/00 (20060101)
C08L 51/00 (20060101)

Foreign Application Priority Data

1982-09-22 JP

Abstract

A process for producing a thermoplastic resin by polymerizing a monomer mixture consisting of an unsaturated nitrile monomer and an alkenyl aromatic hydrocarbon monomer in the presence of a rubbery polymer latex, characterized in that(a) at first, a monomer mixture having an unsaturated nitrile monomer content of 0 to 20 weight % is polymerized in an amount of 30 to 70 weight % based on the amount of the whole monomer mixture,(b) subsequently, the residual monomer mixture having an unsaturated nitrile monomer content of 35 to 90 weight % is polymerized, and the unsaturated nitrile monomer content in the polymer part formed by polymerization in said (a) and (b) steps is 28 to 38 weight %. The thermoplastic resin obtained according to this process has a high chemical resistance, an excellent impact resistance and an excellent processability.