Heat-resistant maleimido polymers/block copolymers

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

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525309, C08F26710, C08F27102

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active

052946746

ABSTRACT:
Novel N-substituted maleimide homopolymers having a number-average molecular weight ranging from 12,000 to about 100,000 are prepared by anionically polymerizing an N-substituted maleimide monomer, in solvent phase, in the presence of at least one organometallic polymerization initiator which comprises sec-butyllithium, a sodium alcoholate, diphenylmethylpotassium, naphthalenelithium or naphthalenesodium, and novel N-substituted maleimide homopolymers having a polydispersity index ranging from 1.1 to 1.5 are prepared by anionically polymerizing an N-substituted maleimide monomer, in solvent phase, in the presence of at least one alkali metal organometallic polymerization initiator and at least one inorganic or organic salt of an alkali or alkaline earth metal; novel block copolymers include blocks of the above maleimido homopolymers and, e.g., blocks of an acrylic or methacrylic polymer.

REFERENCES:
patent: 5164451 (1992-11-01), Kato et al.
T. Hagiwara et al; J. Polymer Science, Polymer Chem. Ed., 26 1011-1020 (1988).
R. Cubbon 6 419 (1965).
Chemical Abstracts, vol. 77, 1972, p. 11, Abstract No. 20159b.
Kobunshi Kagaku, vol. 29, No. 323, pp. 144-148 (Mar. 1972). "Anionic Polymerization of N-Phenylmaleimide and Its N-4-Substituted Derivatives" by M. Yamada, I. Takase and M. Kobayashi.

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