Back to results
US 4,786,552 AGranted
Curable arcylic/fumaric pressure-sensitive adhesives
AssigneeAvery International Corporation
InventorsYukihiko Sasaki, Daniel Holguin, Robert Van Ham
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeAvery International Corporation
InventorsYukihiko Sasaki, Daniel Holguin, Robert Van Ham
Estimating the term…
There is provided a curable pressure-sensitive-adhesive layer comprising an interpolymerized hard-monomer system including one alkyl methacrylate present in an amount up to about 25% by weight, based on the total weight of the monomers, and a soft-monomer system present in an amount of from about 50% to about 95% by weight, and comprising at least one alkyl monoester or diester of an unsaturated dicarboxylic acid containing 4 carbon atoms wherein each alkyl group independently contains from 4 to about 8 carbon atoms, the monoester or diester being present in a total amount of up to about 30% by weight, based on the total weight of the monomers, and at least one alkyl acrylate. Cure occurs by electron-beam radiation or by ultraviolet radiation, the former at a dosage of up to 200 kiloGray, after application to a substrate. A multifunctional monomer may be used to enhance radiant-energy cure.
A pressure-sensitive adhesive which is a cured pressure sensitive adhesive-layer interpolymer formed on a substrate comprising a pressure-sensitive adhesive polymer having a weight average molecular weight of at least about 100,000 and formed of an interpolymerized amount of a hard-monomer system comprising at least one monomer selected from the group consisting of methacrylate, and alkyl methacrylate containing from 1 to about 6 carbon atoms in alkyl group, an unsaturated carboxylic acid and mixtures thereof, said hard-monomer system being present in an amount up to about 25% by weight, based on the total weight of the monomers;
A pressure-sensitive-adhesive construction comprising a face material having thereon a cured pressure sensitive adhesive comprising, based on the total weight of electron-beam-irradiated interpolymerized monomers, from about 50% to ahout 95% by weight soft monomers having a homopolymerization glass-transition temoerature of less than about -25.degree. C., of which from about 5% to about 30% by weight, based on the total weight of the monomers, is at least one alkyl diester of unsaturated dicarboxylic acid containing 4 carbon atoms, wherein each alkyl group independently contains from 4 to about 8 carbon atoms, and in which the balance of soft monomers is an alkyl acrylate containing from 2 to ahout 10 carbon atoms, the balance of the monomer system required to form 100 parts-by-weight monomer being comprised of hard monomers having a homopolymerization glass-transition temperature of greater than about -25.degree. C. and selected from methyl acrylate and an alkyl methacrylate containing from 1 to about 6 carbon atoms in the alkyl group and present in an amount up to 25% by weight, based on the total weight of the monomers, and including at least one unsaturated carboxylic acid containing from about 2 to about 8 carbon atoms and present in a positive amount of up to 10% by weight, based on the total weight of the monomers, and a multifunctional monomer present in a positive amount up to about 8% by weight, based on the weight of the monomers, said polymer having a weight-average molecular-weight of at least about 100,000.
A curable pressure-sensitive adhesive comprising a pressure-sensitive adhesive polymer having a weight average molecular weight of at least about 100,000 and formed of an interpolymerized amount of a hard-monomer system comprising at least one monomer which will homopolymerize to form a polymer having a glass transition temperature greater than about -25.degree. C., said hard-monomer system being present in an amount up to about 25% by weight, based on the total weight of the monomers;
A pressure-sensitive adhesive which is an electron-beam-cured adhesive-layer interpolymer comprising an interpolymerized hard-monomer system comprising at least one alkyl methacrylate containing from 1 to about 6 carbon atoms in the alkyl group, said hard-monomer system being present in an amount up to about 25% by weight, based on the total weight of the monomers, and comprising at least one ester compound selected from alkyl monoesters and diesters of an unsaturated dicarboxylic acid containing 4 carbon atoms wherein each alkyl group independently contains from 4 to about 8 carbon atoms, and in which the ester compound is present in a total amount of up to about 30% by weight, based on the total weight of the monomers, said soft-monomer system further comprising at least one alkyl acrylate.
A pressure-sensitive adhesive which comprises an electron-beam-cured pressure-sensitive adhesive-layer interpolymer having a weight average molecular weight of at least about 100,000 comprising an interpolymerized hard-monomr system comprising at least one alkyl methacrylate containing from 1 to about 6 carbon atoms in the alkyl group, said hard-monomer system being present in an amount up to about 25% by weight, based on the total weight of the monomers, and comprising at least one ester compuund selected from alkyl monoesters and diesters of an unsaturated dicarboxylic acid containing 4 carbon atoms wherein each alkyl group independently contains from 4 to about 8 carbon atoms, and in which the ester compound is present in a total amount of up to about 30% by weight, based on the total weight of the monomers, said soft-monomer system further comprising at least one alkyl acrylate.
An electron-beam-cured pressure-sensitive adhesive comprising a pressure-sensitive adhesive polymer having a weight average molecular weight of at least about 100,000 and containing, on an interpolymerized basis and based on the total weight of the monomers, from about 5% to about 30% by weight of dibutyl fumarate, from about 55% to about 95% by weight of an alkyl acrylate selected from the group consisting of butyl acrylate and 2-ethylhexyl acrylate, methyl methacrylate in a positive amount of up to about 20% by weight, and acrylic acid in an amount of up to about 10% by weight.
Dependencies are inferred from the claim text.