Low color compositions comprising a cross-linked polycyanurate p

Details Low color compositions comprising a cross-linked polycyanurate p Low color compositions comprising a cross-linked polycyanurate p

1980-12-05

1982-06-08

Pertilla, Theodore E.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

260DIG35, 427379, 525452, C08L 6900, C08L 6702

Patent

active

043340458

ABSTRACT:
A monomeric aromatic dicyanate is purified to remove color forming impurities, combined with a zinc salt catalyst and cured first below 200.degree. C. and then for a limited time at or above 200.degree. C., either alone or in admixture with or on a thermoplastic polymer. For example, purified 2,2-bis(4-cyanatophenyl)propane is purified, combined with a poly(ester carbonate) and zinc chloride, and then cured at increasing temperatures from 150.degree. C. to 250.degree. C.

REFERENCES:
patent: 3840578 (1974-10-01), Hennig
patent: 4026913 (1977-05-01), Tanigaichi et al.
patent: 4046796 (1977-09-01), Rotloff et al.
patent: 4157360 (1979-06-01), Prevorsek et al.
V. V. Korshak et al., Vysokomol, soyed. A16, No. 1, pp. 15-23, 1974, (esp. p. 17).
V. V. Korshak et al., Vysokomol, soyed. A17, No. 1, pp. 23-27, 1975, (esp. p. 29).
V. V. Korshak et al., Doklady Akademii Nauk SSSR, vol. 202, No. 2, pp. 347-350, (1972).

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