Cyanato group containing phenolic resins, phenolic triazines der

Details Cyanato group containing phenolic resins, phenolic triazines der Cyanato group containing phenolic resins, phenolic triazines der

1989-03-01

1991-04-02

Marquis, Melvyn I.

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

Synthetic resins

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

525480, 528142, 528146, 528162, C08G 828, C08L 6106

Patent

active

050047884

ABSTRACT:
The present invention is a cyanato group containing phenolic resin of the formula: ##STR1## wherein n is 0 or an integer of one or more, and R is the same or different and is selected from the group consisting of hydrogen and methyl radicals. The advancement over the art is that the resin of the present invention is stable and has a long shelf life. This is indicated by the gel time of greater than 1 minute, preferably greater than 2 minutes, more preferably greater than 10 minutes, and most preferably greater than 20 minutes at 155.degree. C. Alternately, the improved resin of the present invention can be characterized as having a thermal stability indicated by thermal decomposition temperature of at least 400.degree. C. and preferably of at least 450.degree. C. as measured by Thermal Gravimetric Analysis (TGA).

REFERENCES:
patent: 4831086 (1989-05-01), Das et al.

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