Maleimide-based copolymer, process for producing it, and thermop

Details Maleimide-based copolymer, process for producing it, and thermop Maleimide-based copolymer, process for producing it, and thermop

1995-03-06

1995-12-26

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526347, C08F22240, C08F21206

Patent

active

054789036

ABSTRACT:
A maleimide-based copolymer is provided, in which the content of compound (X) shown by the formula (I) is controlled in a range which does not adversely affect the physical properties of the copolymer. Such a copolymer includes an aromatic vinyl-based monomer unit and a maleimide-based monomer unit as essential components, proportion y of the maleimide-based monomer unit in structure is 35 to 65% by weight, and a content of the compound (X) is 3% or less and also, does not exceed a numeral value of 0.06y. The copolymer is prepared by radical copolymerization which is carried out by supplying gradually an aromatic vinyl-based monomer and a maleimide-based monomer into a reaction vessel under a condition of keeping these monomers separated without mixing together beforehand. ##STR1##

REFERENCES:
patent: 2971939 (1961-02-01), Baer
patent: 4683275 (1987-07-01), Kato et al.
Chem. Abstracts 113(2); 7023v (1990).

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