Photo-sensitive cross-linking agents for high molecular weight materials

Claim 2

A composition capable of being cross-linked by exposure to light radiation having a wavelength of from 200 to 600 m Mu consisting essentially of a high molecular weight material selected from the group consisting of polyethylene, polypropylene, ethylene-vinyl acetate copolymers, polystyrene, polyacrylates, polymethacrylates, polyvinylchloride, polyvinylidene chloride, polyacrylonitrile, polycarbonates, polyamides, polyurethanes, unsaturated polyesters, epoxy resins, xylol resins, ureaformaldehyde resins, melamine resins, natural rubbers, butyl rubbers, ethylene-propylene copolymer rubbers, styrene-butadiene copolymer rubbers, neoprene rubbers, alkyd resins, phenol resins, furan resins, a silicon resin, and polyvinylidene fluoride, a photo-active cross-linking agent selected from the group consisting of N,N''-methylenebisacrylamide, N,N''-hexamethylenebismethacrylamide, 5-acrylamino-N-acrylocapromamaide, ethylene glycol dimethacrylate and triethylene glycol dimethacrylate, and a photosensitive cross-linking agent consisting essentially of an aromatic polyaldehyde of the formula: OHC - R - CHO wherein R is a divalent benZene group, a substituted divalent benzene group, a divalent polycyclic aromatic ring, or a group selected from the group consisting of

Claim 3

The composition of claim 3 wherein said photoactive cross-linking agent is present in an amount of from 1 to 50 percent, by weight, based on the weight of said high molecular weight material.

Claim 4

A composition capable of being cross-linked by exposure to light radiation having a wavelength of from 200 to 600 m Mu consisting essentially of a high molecular weight polyethylene and isophthaldialdehyde.

Claim 5

A process for cross-linking a high molecular weight compound selected from the group consisting of polyethylene, polypropylene, ethylene-vinyl acetate copolymers, polystyrene, polyacrylates, polymethacrylates, polyvinylchloride, polyvinylidene chloride, polyacrylonitrile, polycarbonates, polyamides, polyurethanes, unsaturated polyesters, epoxy resins, xylol resins, urea-formaldehyde resins, melamine resins, natural rubbers, butyl rubbers, ethylene-propylene copolymer rubbers, styrene-butadiene copolymer rubbers, neoprene rubbers, alkyd resins, phenol resins, furan resins, a silicon resin, and polyvinylidene fluoride, consisting essentially of adding an aromatic polyaldehyde to said compound and subjecting the resulting mixture to light radiation having a wavelength of from 200 to 600 m Mu , said aromatic polyaldehyde being represented by the formula: OHC - R - CHO wherein R is a divalent benzene group, a substituted divalent benzene group, a divalent polycyclic aromatic ring, or a group selected from the group consisting of

Claim 6

The composition of claim 3 wherein said aromatic polyaldehyde is present in an amount of from 0.01 to 20 percent by weight, based on the weight of said high molecular weight material.

Claim 7

The process of claim 6 wherein the amount of said aromatic polyaldehyde added to said high molecular weight compound is from 0.01 to 20 percent by weight, based on the weight of said high molecular weight compound.