Reinforced composites containing cyanato resins

Details Reinforced composites containing cyanato resins Reinforced composites containing cyanato resins

1979-09-12

1981-03-03

Jacobs, Lewis T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

20415919, C08K 714

Patent

active

042540127

ABSTRACT:
Fibrous-reinforced composites, such as prepregs and sheet moulding compounds, are made with a thermosettable cyanato resin, a photopolymerizable compound, and, if required, a heat-activated accelerator for heat-curing the resin. Fibers may be impregnated with a liquid mixture of the resin and the photopolymerizable compound, and irradiated to cause the mixture to solidify through photopolymerization. The product, when desired, e.g., after stacking to form a multilayer laminate, or after shaping, is heated to cure the resin. Alternatively, the liquid mixture is irradiated to form a solid film into which the fibers are pressed, and then, when required, the assembly is heated to cure the resin. The cyanato resins employed are of formula ##STR1## where R is an aliphatic, cycloaliphatic, or, preferably, an aromatic organic, group of not more than 18 carbon atoms, a is zero, or, if R is an aromatic group, may alternatively be an integer of 1 to 3, and b is an integer of 1 to 6 such that (a+b) is at least 2.

REFERENCES:
patent: 3935330 (1976-01-01), Smith et al.
patent: 3943103 (1976-03-01), Borden et al.
patent: 3962184 (1976-06-01), Notomi et al.
patent: 4017453 (1977-04-01), Heilman et al.
patent: 4025407 (1977-05-01), Chang et al.
patent: 4031067 (1977-06-01), Sunderman et al.
patent: 4059567 (1977-11-01), Sunderman et al.
patent: 4066577 (1978-01-01), Sunderman et al.

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