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US 5,206,321 AGranted
Polycyanates containing mesogenic moieties as lateral substituents
AssigneeThe Dow Chemical Company
InventorsRobert E. Hefner, Jr., Jimmy D. Earls
Life of this patent
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Abstract
Novel polycyanate compositions containing one or more mesogenic moieties as lateral substituents are disclosed which provide improved processability relative to polycyanates containing one or more mesogenic moieties in the main chain of the molecule. Molecular level ordering of the resulting thermosets is maintained much similar to that found thermosets of polycyanates which have one or more mesogenic moieties in the main chain.
Claims14
A polymerizable composition comprising a mixture of
- (A) at least one thermosettable polycyanate containing one or more mesogenic moieties as lateral substituents;
- and
- (B) at least one component selected from the group consisting of
- (1) at least one polycyanate or polycyanamide containing one or more mesogenic moieties in the main chain of the molecule or at least one polycyanate or polycyanamide which does not contain mesogenic moieties, or any combination thereof;
- (2) at least one epoxy resin;
- (3) at least one polymaleimide;
- (4) at least one polyamine;
- (5) at least one polyphenol;
- (6) at least one compound containing one or more polymerizable ethylenically unsaturated group(s);
- (7) at least one compound which contains in the same molecule both a cyanate or cyanamide group and a polymerizable ethylenically unsaturated group;
- (8) at least one compound which contains in the same molecule both a 1,2-epoxide group and a polymerizable ethylenically unsaturated group;
- (9) at least one compound which contains in the same molecule both a maleimide group and a cyanate group;
- (10) at least one compound which contains one or more mesogenic moieties and only one cyanate or cyanamide group per molecule;
- (11) at least one prepolymer of any of the aforesaid components (1) through (10) or any combination of any two or more of said components;
- and
- (12) a mixture of any two or more of components (1) through (11) in any proportion and any combination.
13 more elements
Dependencies are inferred from the claim text.