Patent ID: 8071207
Filing Date: 2011-12-06
Classification: B29C,C08G,C08J,C08L,Y10T

Abstract:
1. A composite material that is suitable for storage at ambient temperatures, said composite material comprising: a resin layer comprising an uncured resin component that forms a cured resin when exposed to a curing agent and heated to a resin component curing temperature that is higher than said ambient temperature, said uncured resin component comprising a liquid part including one or more liquid thermosetting resins that have a liquid part curing temperature which is between 10° C. and 60° C. above said ambient temperature and a solid part that comprises particles of one or more solid thermosetting resins wherein said solid part is dispersed within said liquid part, and wherein said particles have a melting point that is above said ambient temperature and below said resin component curing temperature, said uncured resin component further comprising a gelation agent that is present in a sufficient amount to form said liquid part into a gel that is sufficiently gelatinous to maintain said particles in suspension within said liquid part at said ambient temperatures, said gelation agent having a melting temperature that is below said resin component curing temperature and wherein the viscosity of said uncured resin component changes from a high viscosity state to a low viscosity state when the temperature of said uncured resin component is increased from said ambient temperature to said resin component curing temperature and wherein said high viscosity state is substantially more viscous than said low viscosity state; a curative layer comprising a curative component that comprises a curing agent for said uncured resin component; and a barrier layer that provides separation of said resin layer from said curative layer during storage of said composite material at said ambient temperatures.