Process for making copolymers of maleic anhydride and alkyl...

Details Process for making copolymers of maleic anhydride and alkyl... Process for making copolymers of maleic anhydride and alkyl...

2008-07-08

2008-07-08

Harlan, Robert D. (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S079000, C526S216000, C526S271000, C526S332000, C526S916000

Reexamination Certificate

active

11158126

ABSTRACT:
A process for making high specific viscosity copolymers of maleic anhydride and an alkyl vinyl either having as specific viscosity of at least 7, preferably 10-50, are made by copolymerizing maleic anhydride and an alkly vinyl ether monomers in the presence of added acetylene.

REFERENCES:
patent: 5990227 (1999-11-01), Takizawa et al.

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