A prepreg comprising a fibrous material contacting a polymerizable resin, at least 50 wt % of the polymerizable resin comprising at least one polymerizable monomer having at least two carbon-carbon unsaturated functional groups, the monomer being polymerizable by reaction of the unsaturated functional groups to form a cured resin, wherein the resin has a heat of polymerization of less than 230 KJ/kg to provide a maximum increase in temperature of the prepreg of 60 C. during polymerization under adiabatic conditions.

A composition with improved adhesive and sealant properties comprising a pre-polymer comprising a polymeric unit of the general formula (1A1B-).sub.n, wherein A represents a substituted or un-substituted ester, B represents a substituted or un-substituted acid ester comprising at least two acid ester functionalities, and n represents an integer greater than 1, wherein the compositions has a grafted anhydride content of less than about 0.05 mol/mol of polyacid.

A stretchable ink composition comprising a polyester; a polyurethane elastomer; water; a co-solvent; an optional surfactant; and an optional colorant.

A composition with improved adhesive and sealant properties comprises a) a pre-polymer comprising a polymeric unit of the general formula (-A-B-).sub.n, wherein A represents a substituted or un-substituted ester, B represents a substituted or un-substituted acid ester comprising at least two acid ester functionalities, and n represents an integer greater than 1; wherein the content of grafted anhydride in the composition is less than 0.05 mol/mol of polyacid.

A stretchable ink composition comprising a polyester; a polyurethane elastomer; water; a co-solvent; an optional surfactant; and an optional colorant.

A stretchable ink composition comprising a polyester; a polyurethane elastomer; water; a co-solvent; an optional surfactant; and an optional colorant.

Provided is a hydrogel composition, which comprises a modified HA, PEGDA and water; wherein, based on a total weight of the hydrogel composition, a content of the modified HA is 1 wt % to 7 wt % and a content of PEGDA is 43 wt % to 49 wt %; the modified HA is obtained by modifying HA with methacrylic anhydride; an average molecular weight of PEGDA is 1 kDa to 10 kDa. The hydrogel composition of the present invention has good compatibility of raw materials, which does not cause HA precipitation, and a hydrogel material produced therefrom simultaneously has good mechanical properties, good swell capability and good biocompatibility, such that the hydrogel material can be applied in many fields.

It is an object of the present invention to provide a thermosetting resin composition using a transesterification reaction as a curing reaction, which is inexpensive and has a good curability and can be used in various applications.

A thermosetting resin composition which comprises an ester compound having two or more alkyl ester groups in a molecule (A), a compound having two or more hydroxyl groups in a molecule (B), and a transesterification catalyst (C).

A molded article of a fiber-reinforced resin contains at least a bundled aggregate [A] of discontinuous reinforcing fibers and a matrix resin [M], wherein the average layer thickness h in the molded article of the fiber-reinforced resin is 100 ?m or less and the CV value of the average layer thickness h is 40% or less; and a compression molding method therefor. It is possible to reliably and greatly reduce the occurrence of stress concentration in the molded article and to thereby achieve higher mechanical properties and further reduce variation in the mechanical properties.

The present inventions in various aspects provide elastic biodegradable polymers. In various embodiments, the polymers are formed by the reaction of a multifunctional alcohol or ether and a difunctional or higher order acid to form a pre-polymer, which is cross-linked to form the elastic biodegradable polymer. In preferred embodiments, the cross-linking is performed by functionalization of one or more OR groups on the pre-polymer backbone with vinyl, followed by photopolymerization to form the elastic biodegradable polymer composition or material. Preferably, acrylate is used to add one or more vinyls to the backbone of the pre-polymer to form an acrylated pre-polymer. In various embodiments, acrylated pre-polymers are co-polymerized with one or more acrylated co-polymers.