US4153055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic composition manufacture thereof, and pad formed therewith
Assignee: Northern Illinois Research Inc
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Filing: 1977-04-25
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Granted: 1979-05-08
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Expires: 1997-04-25
Abstract
Abstract A plastic composition adapted for use in contact with the skin, especially in the form of a pad applied to the skin, is manufactured by reacting a mixture of acrylamide-beta methacryloxyethyltrimethylammonium methyl sulfate copolymer, up to about 10 parts of acrylamide-sodium acrylate copolymer per part of said acrylamide-beta methacryloxyethyltrimethylammonium methyl sulfate copolymer, said acrylamide-sodium acrylate copolymer containing up to about 4% of sodium acrylate, and ethylene glycol in an amount sufficient to form a semisolid gel, said proportions being by weight. Useful embodiments of the pad include a sealing pad for an ostomy appliance and a skin-covering pad incorporated in a bandage.
Inventors
- 👤 Donald E. Etes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:18
CPC Classifications
A; A61; A61F; A61F5/00; A61F5/44; A61F5/443; A61L; A61L24/00; A61L24/04; A61L24/06; A61L2400/00; A61L2400/14; Y; Y10; Y10S; Y10S602/00; Y10S602/90
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
107 words
A process of making a plastic composition adapted for use in contact with the skin which comprises: reacting a mixture of about one part of acrylamide-beta methacryloxyethyltrimethylammonium methyl sulfate copolymer, and up to about 10 parts of acrylamide-sodium acrylate copolymer per part of said acrylamide-beta methacryloxyethyltrimethylammonium methyl sulfate copolymer, said acrylamide-sodium acrylate copolymer containing about 1% to about 4% by weight of sodium acrylate; said acrylamide-beta methacryloxyethyl-trimethylammonium methyl sulfate copolymer containing about 14% to 40% by weight of said sulfate with the balance being acrylamide; and about 2 to 5 parts by weight of ethylene glycol per part of the said copolymers combined to form a gel.
Claim 2
Dependent Claim
107 words
A process of making a plastic composition adapted for use in contact with the skin which comprises: reacting a mixture of about one part of acrylamide-beta methacryloxyethyltrimethylammonium methyl sulfate copolymer, and up to about 10 parts of acrylamide-sodium acrylate copolymer per part of said acrylamide-beta methacryloxyethyltrimethylammonium methyl sulfate copolymer, said acrylamide-sodium acrylate copolymer containing about 1% to about 4% by weight of sodium acrylate; said acrylamide-beta methacryloxyethyl-trimethylammonium methyl sulfate copolymer containing about 14% to 40% by weight of said sulfate with the balance being acrylamide; and about 2 to 5 parts by weight of ethylene glycol per part of the said copolymers combined to form a gel.
Claim 3
Dependent Claim
32 words
A process as defined in claim 1 and wherein said acrylamide-sodium acrylate copolymer is present in a weight proportion of about 4-9 parts per part of said acrylamide-beta methacryloxyethyltrimethylammonium methyl sulfate copolymer.
Claim 4
Dependent Claim
19 words
A plastic composition adapted for use in contact with the skin and produced by the process of claim 2.
Claim 5
Dependent Claim
19 words
A plastic composition adapted for use in contact with the skin and produced by the process of claim 1.
Claim 6
Dependent Claim
16 words
A pad adapted for application to the skin and formed of the composition of claim 4.
Claim 7
Dependent Claim
43 words
An annular sealing pad for an ostomy appliance formed of the composition of claim 4, having a central opening for inserting a surgical stoma therethrough, and being adapted to be disposed between the skin and an ostomy appliance to provide a seal therebetween.
Claim 8
Dependent Claim
63 words
A sealing pad as defined in claim 6 and having an annular disc-like body for disposition between the skin and the surface of an annular face plate in said appliance, and a rim integrally formed in one piece with said body around the inner periphery thereof and projecting outwardly therefrom through the face plate for disposition between the stoma and the face plate.
Claim 9
Dependent Claim
27 words
In a bandage for application to the skin, a pad formed of the composition of claim 4 arranged for contacting and covering an area of the skin.
Claim 10
Dependent Claim
31 words
A process in accordance with claim 1 in which: said ethylene glycol is present in a weight proportion of about 4-50 parts per part of said acrylamide-beta methacryloxyethyltrimethylammonium methyl sulfate copolymer.
Claim 11
Dependent Claim
116 words
A process of making a plastic composition adapted for use in contact with the skin and characterized by becoming tacky upon being wetted which comprises: reacting about one part of an acrylic polymer having a molecular weight of about 5 to 10 million of the group consisting of a water-soluble copolymer of acrylamide and a quaternizing agent and a mixture of a water-soluble copolymer of acrylamide and a quaternizing agent and a water-soluble copolymer of acrylamide and an acrylate salt with about 2 to 5 parts of ethylene glycol per part of said polymer or mixture of polymers to form a gel, said reaction taking place in no more than about one hour at ambient temperature.
Claim 12
Dependent Claim
116 words
A process of making a plastic composition adapted for use in contact with the skin and characterized by becoming tacky upon being wetted which comprises: reacting about one part of an acrylic polymer having a molecular weight of about 5 to 10 million of the group consisting of a water-soluble copolymer of acrylamide and a quaternizing agent and a mixture of a water-soluble copolymer of acrylamide and a quaternizing agent and a water-soluble copolymer of acrylamide and an acrylate salt with about 2 to 5 parts of ethylene glycol per part of said polymer or mixture of polymers to form a gel, said reaction taking place in no more than about one hour at ambient temperature.
Claim 13
Dependent Claim
27 words
A process of making a plastic composition in accordance with claim 10 in which: said acrylic polymer is a water-soluble copolymer of acrylamide and a quaternizing agent.
Claim 14
Dependent Claim
38 words
A process of making a plastic composition in accordance with claim 10 in which: a mixture of a water-soluble copolymer of acrylamide and a quaternizing agent and a water-soluble copolymer of acrylamide and an acrylate salt is used.
Claim 15
Dependent Claim
37 words
A process of making a plastic composition in accordance with claim 10 in which: said water-soluble copolymer of acrylamide and a quaternizing agent contains about 10%-40% by weight of beta methacryloxyethyltrimethylammonium methyl sulfate as said quaternizing agent.
Claim 16
Dependent Claim
36 words
A process of making a plastic composition in accordance with claim 10 in which: said water-soluble copolymer of acrylamide and an acrylate salt contains about 1% to 4% by weight of sodium acrylate as said salt.
Claim 17
Dependent Claim
53 words
A process of making a plastic composition in accordance with claim 10 in which: a mixture of about one part of a water-soluble copolymer of acrylamide and a quaternizing agent and about 4 to 9 parts of a water-soluble copolymer of acrylamide and an acrylate salt is used to form an ostomy appliance.
Claim 18
Dependent Claim
10 words
A plastic composition prepared by the process of claim 10.
Claim 19
Dependent Claim
27 words
A process of making a plastic composition in accordance with claim 10 in which: said acrylic polymer is a water-soluble copolymer of acrylamide and an acrylate salt.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-07 | 1982-11-06 | 1983-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-07 | 1986-11-06 | 1987-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-07 | 1990-11-06 | 1991-05-08 | $7700.00 | Window Closed / Lapsed |