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US 4,806,625 AGranted
Flame resistant polyaromatic cyanate resins with improved thermal stability
AssigneeThe Dow Chemical Company
InventorsGary W. Bogan, Georgia A. Monnerat
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Abstract
Halogen-containing hydrocarbon phenol cyanate resins are prepared by reacting the product resulting from reacting a hydrocarbon phenol resin with a metahalogenated hydroxymethyl phenol with a cyanogen halide.
Claims56
A hydrocarbon phenol cyanate resin represented by the following formula I ##STR8## wherein each R is independently hydrogen or an alkyl group having from 1 to about 10 carbon atoms;
- each m independently has a value from 1 to about 6;
- m' has an average value from zero to about 4;
- each R' is independently hydrogen or a group represented by the following formula II ##STR9## wherein each R" is independently an alkyl group having from 1 to about 4 carbon atoms;
- each X is a halogen;
- with the proviso that at least one R' group is a group represented by formula II.
2 more elements
A hydrocarbon phenol cyanate resin mixture comprising
- (A) at least one hydrocarbon phenol cyanate resin represented by the following formula I ##STR10## wherein each R is independently hydrogen or an alkyl group having from 1 to about 10 carbon atoms;
- each m independently has a value from 1 to about 6;
- each m' has an average value from zero to about 4;
- each R' is independently hydrogen or a group represented by the following formula II;
- ##STR11## wherein each R" is independently an alkyl group having from 1 to about 4 carbon atoms;
- each X is a halogen;
- with the proviso that at least one R' group is a group represented by formula II;
- and
- (B) at least one halogen-free hydrocarbon phenol cyanate resin represented by the following formula III ##STR12## wherein each R is independently hydrogen or an alkyl group having from 1 to about 10 carbon atoms;
- each m independently has a value from 1 to about 6;
- m' has an average value from zero to about 4;
- and
- wherein component (A) is present in an amount of from about 1 to about 99 percent by weight and component (B) is present in an amount of from about 99 to about 1 percent by weight based upon the combined weight of components (A) and (B).
10 more elements
Dependencies are inferred from the claim text.