Pure polyurethane condom having adhesive layer and preparation method therefor

Patent metadata

Field	Value
Publication number	US-2023157862-A1
Application number	US-202017916164-A
Country	US
Kind code	A1
Filing date	Oct 22, 2020
Priority date	Mar 31, 2020
Publication date	May 25, 2023
Grant date	—

Abstract

Disclosed are a polyurethane condom (100) with an adhesive layer (20) and a preparation method therefor. The polyurethane condom (100) with the adhesive layer (20) comprises a first polyurethane film layer (10), the adhesive layer (20) on the first polyurethane film layer (10), and a second film layer (30) on the adhesive layer (20), wherein the adhesive layer (20) includes 0 to 100% by weight of a polar component, 0 to 100% by weight of a non-polar component, and 0 to 100% by weight of a material composed of a polar and non-polar hybrid component, and has a thickness of 0.1 to 30 μm.

First claim

1 . A polyurethane condom having an adhesive layer, comprising:
a first polyurethane film layer; an adhesive layer on the first polyurethane film layer; and a second film layer on the adhesive layer, wherein the adhesive layer includes 0 to 100% by weight of a polar component, 0 to 100% by weight of a non-polar component, and 0 to 100% by weight of a material composed of a polar and non-polar hybrid component, and has a thickness of 0.1 to 30 μm.

2 . The polyurethane condom having an adhesive layer according to claim 1 , having a burst pressure of 1 kPa or more, and/or a burst volume of 5 L or more.

3 . The polyurethane condom having an adhesive layer according to claim 1 , having a thickness of 0.010 to 0.080 mm.

4 . The polyurethane condom having an adhesive layer according to claim 1 , wherein the adhesive layer has a 100% tensile modulus of 2.5 N/mm 2 or lower.

5 . The polyurethane condom having an adhesive layer according to claim 1 , wherein the polar component is selected from the group consisting of polyurethane resins, neoprene, polyvinyl acetate resins, acrylonitrile-butadiene-styrene, vinyl acetate-ethylene copolymer resins, polyacrylates, polyvinyl chlorides, proteins, starches, celluloses, and epoxy resins, and any combinations thereof.

6 . The polyurethane condom having an adhesive layer according to claim 1 , wherein the adhesive layer includes 100% by weight of the polar component which is a polyurethane resin.

7 . The polyurethane condom having an adhesive layer according to claim 6 , wherein the polyurethane resin is selected from the group consisting of anionic, cationic, nonionic, and amphoteric waterborne polyurethanes, or solvent-based and solvent-free polyurethanes, and any combinations thereof.

8 . The polyurethane condom having an adhesive layer according to claim 7 , wherein the polyurethane resin is selected from the group consisting of polyether-based, polyester-based, and polyether-polyester hybrid polyurethane resins, and any combinations thereof.

9 . The polyurethane condom having an adhesive layer according to claim 7 , wherein the anionic waterborne polyurethane is a carboxylic acid-based polyurethane, a sulfonic acid-based polyurethane, or a mixture of both.

10 . The polyurethane condom having an adhesive layer according to claim 1 , wherein the non-polar component is selected from the group consisting of natural rubbers, polyolefins, silicone resins, butyl rubbers, styrene-butadiene rubbers, ethylene-propylene-diene rubbers, polystyrenes, polyisoprenes, polyesters, rosin resins, terpene resins, rosin resins and stretched forms thereof, and any combinations thereof.

11 . The polyurethane condom having an adhesive layer according to claim 1 , wherein the polar and non-polar hybrid component is selected from an organically modified polar or non-polar polymeric material.

12 . The polyurethane condom having an adhesive layer according to claim 11 , wherein the organic modification is selected from the group consisting of organosilicon modification, organofluorine modification, silane modification, acrylate copolymerization modification, vinyl modification, aromatic monomer modification, polyether modification, polyester modification, isocyanate modification, amination, carboxylation, hydroxylation, epoxidation, sulfonation, and polymerization modification, and any combinations thereof.

13 . The polyurethane condom having an adhesive layer according to claim 1 , wherein the adhesive layer includes 50% by weight of a polar component and 50% by weight of a non-polar component.

14 . The polyurethane condom having an adhesive layer according to claim 1 , comprising at least one adhesive layer.

15 . The polyurethane condom having an adhesive layer according to claim 1 , wherein the second film layer has a 100% modulus of 1 N/mm 2 or lower.

16 . The polyurethane condom having an adhesive layer according to claim 1 , wherein the second film layer is a layer composed of a polyurethane resin.

17 . The polyurethane condom having an adhesive layer according to claim 1 , wherein the second film layer is a layer composed of a natural rubber or a polyisoprene resin.

18 . A polyurethane condom having an adhesive layer, comprising:
a first polyurethane film layer; a first adhesive layer on the first polyurethane film layer; a second film layer on the adhesive layer; a second adhesive layer on the second film layer, the second adhesive layer having the same structure as that of the first adhesive layer; and a third polyurethane film layer on the second film layer, the third polyurethane film layer having the same structure as that of the first polyurethane film layer, wherein the first adhesive layer includes 0 to 100% by weight of a polar component, 0 to 100% by weight of a non-polar component, and 0 to 100% by weight of a material composed of polar and non-polar hybrid component, and has a thickness of 0.1-30 μm; wherein the first adhesive layer has a 100% tensile modulus of 2.5 N/mm 2 or lower; wherein the second film layer includes a natural rubber or a polyisoprene resin; and wherein the polyurethane condom has a thickness of 0.010-0.080 mm.

19 . A method for preparing a polyurethane condom having an adhesive layer, comprising the steps of:
dipping in a polyurethane resin and drying, to form a first polyurethane film layer; dipping in an adhesive layer material and drying, to form an adhesive layer on the first polyurethane film layer; dipping in a second film layer material and drying, to form a second film layer on the adhesive layer; dipping in a release agent to apply the release agent on the second film layer, followed by drying, demolding, and electrical testing to obtain the polyurethane condom having an adhesive layer; wherein the adhesive layer includes 0 to 100% by weight of a polar component, 0 to 100% by weight of a non-polar component, and 0 to 100% by weight of a material composed of polar and non-polar hybrid component, and has a thickness of 0.1-30 μm.

20 . The method for preparing a polyurethane condom having an adhesive layer according to claim 19 , wherein the dipping in a polyurethane resin is carried out by dipping a mold composed of glass or a thermoplastic polymer in the polyurethane resin.

Assignees

• Reckitt Benckiser Health Ltd

Inventors

• Dai Jiabing
• Li Weihu
• Feng Linlin
• Chen Liang

Classifications

• B29C41/40

  Cores · CPC title

• A61F6/04 Primary

  Condoms, sheaths or the like {, e.g. combined with devices protecting against contagion} · CPC title

• A61L2420/04

  Coatings containing a composite material such as inorganic/organic, i.e. material comprising different phases · CPC title

• B29C33/40

  Plastics, e.g. foam or rubber · CPC title

• A61L31/06

  obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds {(A61L31/041 takes precedence)} · CPC title