Adhesive compositions

Claim 2

An adhesive composition suitable for medical purposes comprising a substantially homogeneous mixture on a percent weight basis of from about 30% to about 70% of a pressure sensitive viscous adhesive material and an optional thermoplastic elastomer said pressure sensitive adhesive material selected from the group consisting of natural rubber, silicone rubber, acrylonitrile rubber, polyurethane rubber, and polyisobutylenes and said optional thermoplastic elastomer selected from the group consisting of medium molecular weight polyisobutylene, butyl rubber, and styrene copolymers and from about 3% to about 60% by weight of one or more natural or synthetic polymers capable of developing elastomeric properties when hydrated selected from the group consisting of gluten and long chain polymers of methyl vinyl ether/maleic acid.

Claim 3

An adhesive composition of claim 1 wherein said long chain polymer is selected from the group consisting of poly(methyl vinyl ether/maleic acid), poly(methyl vinyl ether/maleic anhydride), and calcium, sodium poly(methyl vinyl ether/maleic acid).

Claim 4

An adhesive composition of claim 2 wherein said pressure sensitive viscous adhesive material is low molecular weight polyisobutylene and said polyisobutylene is present at from about 40% to about 50% by weight of said composition.

Claim 5

The adhesive composition of claim 3 consisting essentially of on a weight percent basis of about 40% polyisobutylene and about 60% calcium, sodium poly(methyl vinyl ether/maleic acid).

Claim 6

An adhesive composition suitable for medical purposes comprising a substantially homogeneous mixture on a percent weight basis of from about 30% to about 70% of a pressure sensitive viscous adhesive material and an optional thermoplastic elastomer said pressure sensitive viscous adhesive material selected from the group consisting of natural rubber, silicone rubber, acrylonitrile rubber, polyurethane rubber, and polyisobutylenes and said optional thermoplastic elastomer selected from the group consisting of medium molecular weight polyisobutylenes, butyl rubber, and styrene copolymers; from about 3% to about 60% by weight of one or more natural or synthetic polymers capable of developing elastomeric properties when hydrated selected from the group consisting of gluten and long chain polymers of methyl vinyl ether/maleic acid; up to about 50% by weight of one or more water soluble hydrocolloids selected from the group consisting of sodium carboxymethylcellulose, pectin, gelatin, guar gum, locust bean gum, gum karaya, and mixtures thereof; and up to about 30% by weight of one or more water swellable cohesive strengthening agents selected from the group consisting of water insoluble cross-linked sodium carboxymethylcellulose, water insoluble starch-acrylonitrile graft polymer, and water insoluble cross-linked dextran provided that the water soluble hydrocolloids and water insoluble cohesive strengthening agents together are no more than about 60% by weight of said adhesive composition.

Claim 7

An adhesive composition suitable for medical purposes comprising a substantially homogeneous mixture on a percent weight basis of from about 30% to about 70% of a pressure sensitive viscous adhesive material and an optional thermoplastic elastomer said pressure sensitive viscous adhesive material selected from the group consisting of natural rubber, silicone rubber, acrylonitrile rubber, polyurethane rubber, and polyisobutylenes and said optional thermoplastic elastomer selected from the group consisting of medium molecular weight polyisobutylenes, butyl rubber, and styrene copolymers; from about 3% to about 60% by weight of one or more natural or synthetic polymers capable of developing elastomeric properties when hydrated selected from the group consisting of gluten and long chain polymers of methyl vinyl ether/maleic acid; up to about 50% by weight of one or more water soluble hydrocolloids selected from the group consisting of sodium carboxymethylcellulose, pectin, gelatin, guar gum, locust bean gum, gum karaya, and mixtures thereof; and up to about 30% by weight of one or more water swellable cohesive strengthening agents selected from the group consisting of water insoluble cross-linked sodium carboxymethylcellulose, water insoluble starch-acrylonitrile graft polymer, and water insoluble cross-linked dextran provided that the water soluble hydrocolloids and water insoluble cohesive strengthening agents together are no more than about 60% by weight of said adhesive composition.

Claim 8

An adhesive composition of claim 5 wherein said long chain polymer is selected from the group consisting of poly(methyl vinyl ether/maleic acid), poly(methyl vinyl ether/maleic anhydride), and calcium, sodium poly(methyl vinyl ether/maleic acid).

Claim 9

An adhesive composition of claim 6 wherein said pressure sensitive viscous adhesive material is low molecular weight polyisobutylene.

Claim 10

An adhesive composition suitable for medical purposes comprising a substantially homogeneous mixture on a percent weight basis of from about 40% to about 50% of a pressure sensitive adhesive component comprising low molecular weight polyisobutylene and an optional thermoplstic elastomer selected from the group consisting of medium molecular weight polyisobutylene, butyl rubber, and styrene-isoprene-styrene copolymers; from about 10% to about 35% of a polymer selected from the group consisting of poly(methyl vinyl ether/maleic acid), poly(methyl vinyl ether/maleic anhydride), and calcium, sodium poly(methyl vinyl ether/maleic acid); from about 15% to about 40% of one or more water soluble hydrocolloids selected from the group consisting of sodium carboxymethylcellulose, pectin, gelatin, guar gum, locust bean gum, gum karaya, and mixtures thereof; and up to about 30% of one or more water swellable cohesive strengthening agents selected from the group consisting of water insoluble cross-linked sodium carboxymethylcellulose, water insoluble starch-acrylonitrile graft copolymer, water insoluble cross-linked dextran, and mixtures thereof provided that the water soluble hydrocolloids and water swellable cohesive strengthening agents together are no more than about 55% by weight of said composition.

Claim 11

An adhesive composition suitable for medical purposes comprising a substantially homogeneous mixture on a percent weight basis of from about 40% to about 50% of a pressure sensitive adhesive component comprising low molecular weight polyisobutylene and an optional thermoplstic elastomer selected from the group consisting of medium molecular weight polyisobutylene, butyl rubber, and styrene-isoprene-styrene copolymers; from about 10% to about 35% of a polymer selected from the group consisting of poly(methyl vinyl ether/maleic acid), poly(methyl vinyl ether/maleic anhydride), and calcium, sodium poly(methyl vinyl ether/maleic acid); from about 15% to about 40% of one or more water soluble hydrocolloids selected from the group consisting of sodium carboxymethylcellulose, pectin, gelatin, guar gum, locust bean gum, gum karaya, and mixtures thereof; and up to about 30% of one or more water swellable cohesive strengthening agents selected from the group consisting of water insoluble cross-linked sodium carboxymethylcellulose, water insoluble starch-acrylonitrile graft copolymer, water insoluble cross-linked dextran, and mixtures thereof provided that the water soluble hydrocolloids and water swellable cohesive strengthening agents together are no more than about 55% by weight of said composition.

Claim 12

An adhesive composition of claim 8 wherein said water soluble hydrocolloids are selected from the group consisting of guar gum, sodium carboxymethylcellulose, and mixtures thereof and said cohesive strengthening agent if present is cross-linked sodium carboxymethylcellulose.

Claim 13

The adhesive composition of claim 9 consisting essentially of on a percent weight basis of about 40% low molecular weight polyisobutylene, about 25% guar gum, about 10% sodium carboxymethylcellulose, about 15% cross-linked sodium carboxymethylcellulose, and about 10% calcium, sodium poly(methyl vinyl ether/maleic acid).

Claim 14

The adhesive composition of claim 9 consisting essentially of on a weight percent basis of about 40% low molecular weight polyisobutylene, about 25% guar gum, about 10% sodium carboxymethylcellulose, about 15% cross-linked sodium carboxymethylcellulose, and about 10% poly(methyl vinyl ether/maleic acid).

Claim 15

The adhesive composition of claim 9 consisting essentially of on a percent weight basis of about 40% low molecular weight polyisobutylene, about 30% sodium carboxymethylcellulose, and about 30% calcium, sodium poly(methyl vinyl ether/maleic acid).

Claim 16

The adhesive composition of claim 9 consisting essentially of on a weight percent basis of about 40% low molecular weight polyisobutylene, about 30% guar gum, and about 30% calcium, sodium poly(methyl vinyl ether/maleic acid).

Claim 17

The adhesive composition of claim 9 consisting essentially of on a weight percent basis of about 40% low molecular weight polyisobutylene, about 17.2% sodium carboxymethylcellulose, about 25.6% cross-linked sodium carboxymethylcellulose, and about 17.2% calcium, sodium poly(methyl vinyl ether/maleic acid).

Claim 18

A skin barrier comprising an adhesive layer having a thin continuous or discontinuous polymeric film laminated to one surface of the adhesive, said adhesive comprising a substantially homogeneous mixture on a percent weight basis of from about 30% to about 70% of a pressure sensitive viscous adhesive material and an optional thermoplastic elastomer said pressure sensitive adhesive material selected from the group consisting of natural rubber, silicone rubber, acrylonitrile rubber, polyurethane rubber, and polyisobutylenes and said optional thermoplastic elastomer selected from the group consisting of medium molecular weight polyisobutylenes, butyl rubber, and styrene copolymers and from about 3% to 60% by weight of one or more natural or synthetic polymers capable of developing elastomeric properties when hydrated selected from the group consisting of gluten and long chain polymers of methyl vinyl ether/maleic acid.

Claim 19

A skin barrier comprising an adhesive layer having a thin continuous or discontinuous polymeric film laminated to one surface of the adhesive, said adhesive comprising a substantially homogeneous mixture on a percent weight basis of from about 30% to about 70% of a pressure sensitive viscous adhesive material and an optional thermoplastic elastomer said pressure sensitive adhesive material selected from the group consisting of natural rubber, silicone rubber, acrylonitrile rubber, polyurethane rubber, and polyisobutylenes and said optional thermoplastic elastomer selected from the group consisting of medium molecular weight polyisobutylenes, butyl rubber, and styrene copolymers and from about 3% to 60% by weight of one or more natural or synthetic polymers capable of developing elastomeric properties when hydrated selected from the group consisting of gluten and long chain polymers of methyl vinyl ether/maleic acid.

Claim 20

A skin barrier of claim 15 wherein said long chain polymer is selected from the group consisting of poly(methyl vinyl ether/maleic acid), poly(methyl vinyl ether/maleic anhydride), and calcium, sodium poly(methyl vinyl ether/maleic acid).

Claim 21

A skin barrier of claim 16 wherein said pressure sensitive viscous adhesive material is low molecular weight polyisobutylene and said polyisobutylene is present at from about 40% to about 50% by weight of said composition.

Claim 22

A skin barrier of claim 17 wherein said adhesive layer consists essentially of on a weight percent basis of about 40% polyisobutylene and about 60% calcium, sodium poly(methyl vinyl ether/maleic acid).

Claim 23

A skin barrier of claim 15 wherein said polymeric film is polyethylene.

Claim 24

A skin barrier comprising an adhesive layer having a thin continuous or discontinuous polymeric film laminated on one surface of the adhesive, said adhesive comprising a substantially homogeneous mixture on a percent weight basis of from about 30% to about 70% of a pressure sensitive viscous adhesive material and an optional thermoplastic elastomer said pressure sensitive adhesive material selected from the group consisting of natural rubber, silicone rubber, acrylonitrile rubber, polyurethane rubber, and polyisobutylenes and said optional thermoplastic elastomer selected from the group consisting of medium molecular weight polyisobutylenes, butyl rubber, and styrene compolymers; from about 3% to about 60% by weight of one or more natural or synthetic polymers capable of developing elastomeric properties when hydrated selected from the group consisting of gluten and long chain polymers of methyl vinyl ether/maleic acid; up to about 50% by weight of one or more water soluble hydrocolloids selected from the group consisting of sodium carboxymethylcellulose, pectin, gelatin, guar gum, locust bean gum, gum karaya, and mixtures thereof; and up to about 30% by weight of one or more water swellable cohesive strengthening agents selected from the group consisting of water insoluble cross-linked sodium carboxymethylcellulose, water insouble starch-acrylonitrile graft copolymer, and water insoluble cross-linked dextran provided that the water soluble hydrocolloids and water insoluble cohesive strengthening agents together are no more than about 60% by weight of said adhesive composition.

Claim 25

A skin barrier comprising an adhesive layer having a thin continuous or discontinuous polymeric film laminated on one surface of the adhesive, said adhesive comprising a substantially homogeneous mixture on a percent weight basis of from about 30% to about 70% of a pressure sensitive viscous adhesive material and an optional thermoplastic elastomer said pressure sensitive adhesive material selected from the group consisting of natural rubber, silicone rubber, acrylonitrile rubber, polyurethane rubber, and polyisobutylenes and said optional thermoplastic elastomer selected from the group consisting of medium molecular weight polyisobutylenes, butyl rubber, and styrene compolymers; from about 3% to about 60% by weight of one or more natural or synthetic polymers capable of developing elastomeric properties when hydrated selected from the group consisting of gluten and long chain polymers of methyl vinyl ether/maleic acid; up to about 50% by weight of one or more water soluble hydrocolloids selected from the group consisting of sodium carboxymethylcellulose, pectin, gelatin, guar gum, locust bean gum, gum karaya, and mixtures thereof; and up to about 30% by weight of one or more water swellable cohesive strengthening agents selected from the group consisting of water insoluble cross-linked sodium carboxymethylcellulose, water insouble starch-acrylonitrile graft copolymer, and water insoluble cross-linked dextran provided that the water soluble hydrocolloids and water insoluble cohesive strengthening agents together are no more than about 60% by weight of said adhesive composition.

Claim 26

A skin barrier of claim 20 wherein said long chain polymer is selected from the group consisting of poly(methyl vinyl ether/maleic acid), poly(methyl vinyl ether/maleic anhydride), and calcium, sodium poly(methyl vinyl ether/maleic acid).

Claim 27

A skin barrier of claim 21 wherein said pressure sensitive viscous adhesive material is low molecular weight polyisobutylene.

Claim 28

A skin barrier of claim 20 wherein said polymeric film is polyethylene.

Claim 29

A skin barrier comprising an adhesive layer having a thin continuous or discontinuous olymeric film laminated to one surface of the adhesive, said adhesive comprising a substantially homogeneous mixture on a percent weight basis of from about 40% to about 50% of a pressure sensitive adhesive component comprising low molecular weight polyisobutylene and an optional thermoplastic elastomer selected from the group consisting of medium molecular weight polyisobutylene, butyl rubber, and styrene-isoprenestyrene copolymers; from about 10% to about 35% of a polymer selected from the group consisting of poly(methyl vinyl ether/maleic acid), poly(methyl vinyl ether/maleic anhydride), and calcium, sodium poly(methyl vinyl ether/maleic acid); from about 15% to about 40% of one or more water soluble hydrocolloids selected from the group consisting of sodium carboxymethylcellulose, pectin, gelatin, guar gum, locust bean gum, gum karaya, and mixtures thereof; and up to about 30% of one or more water swellable cohesive strengthening agents selected from the group consisting of water insoluble cross-linked sodium carboxymethylcellulose, water insoluble startch-acrylonitrile graft copolymer, water insoluble cross-linked dextran, and mixtures thereof provided that the water soluble hydrocolloids and water swellable cohesive strengthening agents together are no more than about 55% by weight of said composition.

Claim 30

A skin barrier comprising an adhesive layer having a thin continuous or discontinuous olymeric film laminated to one surface of the adhesive, said adhesive comprising a substantially homogeneous mixture on a percent weight basis of from about 40% to about 50% of a pressure sensitive adhesive component comprising low molecular weight polyisobutylene and an optional thermoplastic elastomer selected from the group consisting of medium molecular weight polyisobutylene, butyl rubber, and styrene-isoprenestyrene copolymers; from about 10% to about 35% of a polymer selected from the group consisting of poly(methyl vinyl ether/maleic acid), poly(methyl vinyl ether/maleic anhydride), and calcium, sodium poly(methyl vinyl ether/maleic acid); from about 15% to about 40% of one or more water soluble hydrocolloids selected from the group consisting of sodium carboxymethylcellulose, pectin, gelatin, guar gum, locust bean gum, gum karaya, and mixtures thereof; and up to about 30% of one or more water swellable cohesive strengthening agents selected from the group consisting of water insoluble cross-linked sodium carboxymethylcellulose, water insoluble startch-acrylonitrile graft copolymer, water insoluble cross-linked dextran, and mixtures thereof provided that the water soluble hydrocolloids and water swellable cohesive strengthening agents together are no more than about 55% by weight of said composition.

Claim 31

A skin barrier of claim 24 wherein said water soluble hydrocolloids are selected from the group consisting of guar gum, sodium carboxymethylcellulose, and mixtures thereof and said cohesive strengthening agent if present is cross-linked sodium carboxymethylcellulose.

Claim 32

A skin barrier of claim 25 wherein said adhesive layer consists essentially of on a percent weight basis of about 40% low molecular weight polyisobutylene, about 25% guar gum, about 10% sodium carboxymethylcellulose, about 15% cross-linked sodium carboxymethylcellulose, and about 10% calcium, sodium poly(methyl vinyl ether/maleic acid).

Claim 33

A skin barrier of claim 25 wherein said adhesive layer consists essentially of on a percent weight basis of about 40% low molecular weight polyisobutylene, about 25% guar gum, about 10% sodium carboxymethylcellulose, about 15% cross-linked sodium carboxymethylcellulose, and about 10% poly(methyl vinyl ether/maleic acid).

Claim 34

A skin barrier of claim 25 wherein said adhesive layer consists essentially of on a percent weight basis of about 40% low molecular weight polyisobutylene, about 30% sodium carboxymethylcellulose, and about 30% calcium, sodium poly(methyl vinyl ether/maleic acid).

Claim 35

A skin barrier of claim 25 wherein said adhesive layer consists essentially of on a weight percent basis of about 40% low molecular weight polyisobutylene, about 30% guar gum, and about 30% calcium, sodium poly(methyl vinyl ether/maleic acid).

Claim 36

A skin barrier of claim 25 wherein said adhesive layer consists essentially of on a weight percent basis of about 40% low molecular weight polyisobutylene, about 17.2% sodium carboxymethylcellulose, about 25.6% cross-linked sodium carboxymethylcellulose, and about 17.2% calcium, sodium poly(methyl vinyl ether/maleic acid).

Claim 37

A skin barrier of claim 24 wherein said polymeric film is polyethylene.