US4078568A
Expired / Lapsed
US
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Plastic composition and method
Assignee: Northern Illinois Research Inc
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Filing: 1976-10-12
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Granted: 1978-03-14
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Expires: 1996-10-12
Abstract
Abstract A plastic composition prepared by the reaction of a non-ionic water soluble acrylic polyelectrolyte and a cationic water soluble acrylic polyelectrolyte with propylene glycol and incorporating or conducting the reaction in the presence of polyvinyl pyrrolidone with or without water. In one embodiment a plastic composition adapted for use in contact with the skin, especially in the form of a pad, seal or bandage is prepared by reacting a mixture of: (1) acrylamide-beta methacrylyloxyethyl trimethyl ammonium sulfate copolymer; (2) polyacrylamide; (3) propylene glycol; and (4) polyvinyl pyrrolidone. The plastic composition can contain glycerin in varying amounts to enhance the "feel" and flexibility of the final product. Water can be incorporated with the polyvinyl pyrrolidone to reduce the gel time and facilitate the molding process. Useful embodiments of the composition having the proper gel structure and adhesiveness for use as molded seals or pads in ostomy appliances and skin-covering pads incorporated in a bandage are disclosed.
Inventors
- 👤 Donald E. Etes
- 👤 James D. Finch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:51
CPC Classifications
A; A61; A61L; A61L24/00; A61L24/04; A61L24/06; A61F; A61F5/00; A61F5/44; A61F5/445; A61F5/448; A61L15/00; A61L15/16; A61L15/42; A61L15/60; C; C08; C08K; C08K5/00; C08K5/04; C08K5/05; C08K5/053; C08L; C08L33/00; C08L33/24; C08L33/26; A61L2400/00; A61L2400/14; Y; Y10; Y10S; Y10S128/00; Y10S128/24
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
61 words
A process of making a plastic composition adapted for use in contact with the skin which comprises forming a mixture of a non-ionic water soluble polyacrylamide polyelectrolyte containing about 2% to 4% by weight of copolymerized sodium acrylate and a cationic water soluble polyelectrolyte acrylamide -beta methacrylyloxyethyltrimethylammonium methyl sulfate copolymer, and propylene glycol in an amount sufficient to form a gel.
Claim 2
Dependent Claim
61 words
A process of making a plastic composition adapted for use in contact with the skin which comprises forming a mixture of a non-ionic water soluble polyacrylamide polyelectrolyte containing about 2% to 4% by weight of copolymerized sodium acrylate and a cationic water soluble polyelectrolyte acrylamide -beta methacrylyloxyethyltrimethylammonium methyl sulfate copolymer, and propylene glycol in an amount sufficient to form a gel.
Claim 3
Dependent Claim
25 words
A process as defined in claim 1 and wherein said copolymer contains about 10-40% by weight of beta methacrylyloxyethyltrimethylammonium methyl sulfate and the balance acrylamide.
Claim 4
Dependent Claim
27 words
A process as defined in claim 1 and wherein said propylene glycol is present in a weight proportion of about one part per part of said polymers.
Claim 5
Dependent Claim
44 words
A process as defined in claim 1 and wherein said copolymer contains about 14-23% by weight of beta methacrylyloxyethyltrimethylammonium methyl sulfate and the balance acrylamide, and said propylene glycol is present in a weight proportion of about one part per part of said polymers.
Claim 6
Dependent Claim
25 words
A process as defind in claim 1 and wherein said mixture contains about one part of glycerin per 1 to 4 parts of said polymers.
Claim 7
Dependent Claim
24 words
A process as defined in claim 1 and wherein said mixture contains about 1 part of polyvinyl pyrrolidone per 5 parts of said polymers.
Claim 8
Dependent Claim
28 words
A process as defined in claim 1 and wherein said polyacrylamide is present in a weight proportion of about 4 to 9 parts per part of said copolymer.
Claim 9
Dependent Claim
44 words
A process as defined in claim 7 and wherein said copolymer contains about 10-40% by weight of beta methacrylyloxyethyltrimethylammonium methyl sulfate and the balance acrylamide, and said propylene glycol is present in a weight proportion of about one part per part of said polymers.
Claim 10
Dependent Claim
21 words
A process as defined in claim 7 and wherein said copolymer contains about 14-23% by weight of beta methacrylyloxyethyltrimethylammonium methyl sulfate.
Claim 11
Dependent Claim
19 words
A plastic composition adapted for use in contact with the skin and produced by the process of claim 1.
Claim 12
Dependent Claim
19 words
A plastic composition adapted for use in contact with the skin and produced by the process of claim 7.
Claim 13
Dependent Claim
16 words
A pad adapted for application to the skin and formed of the composition of claim 10.
Claim 14
Dependent Claim
43 words
An annular sealing pad for an ostomy appliance formed of the composition of claim 10, 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 15
Dependent Claim
63 words
A sealing pad as defined in claim 13 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 16
Dependent Claim
27 words
In a bandage for application to the skin, a pad formed of the composition of claim 10 arranged for contacting and covering an area of the skin.
Claim 17
Dependent Claim
71 words
A plastic composition formed by forming a mixture of: a cationic copolymer of acrylamide and beta methacrylyloxyethyltrimethylammonium methyl sulfate; a non-ionic polymer of acrylamide; glycerin; propylene glycol; and polyvinyl pyrrolidone; the ratio of said cationic copolymer and said non-ionic polymer being about 1 to 9 to 1 to 1, and the total amounts of glycerin and propylene glycol being in excess of the total amounts of said cationic and non-ionic polymers.
Claim 18
Dependent Claim
71 words
A plastic composition formed by forming a mixture of: a cationic copolymer of acrylamide and beta methacrylyloxyethyltrimethylammonium methyl sulfate; a non-ionic polymer of acrylamide; glycerin; propylene glycol; and polyvinyl pyrrolidone; the ratio of said cationic copolymer and said non-ionic polymer being about 1 to 9 to 1 to 1, and the total amounts of glycerin and propylene glycol being in excess of the total amounts of said cationic and non-ionic polymers.
Claim 19
Dependent Claim
28 words
A plastic composition in accordance with claim 16 in which: the ratio of the amounts of said cationic copolymer and said non-ionic polymer is about 1 to 9.
Claim 20
Dependent Claim
28 words
A plastic composition in accordance with claim 16 in which: the ratio of the amounts of said cationic copolymer and said non-ionic polymer is about 1 to 1.
Claim 21
Dependent Claim
14 words
A plastic composition in accordance with clain 16 containing a small amount of water.
Claim 22
Dependent Claim
14 words
A plastic composition in accordance with clain 16 containing a small amount of water.
Claim 23
Dependent Claim
23 words
A plastic composition in accordance with claim 19 in which about 2 to 8% by weight of water based on the total composition.
Claim 24
Dependent Claim
53 words
A plastic composition in accordance with claim 16 in which: said cationic copolymer of acrylamide is the copolymer of acrylamide and beta methacrylyloxyethyltrimethylammonium methyl sulfate containing about 10 to 40% by weight of said sulfate; said non-ionic polymer of acrylamide is polyacrylamide containing about 2 to 4% by weight of copolymerized sodium acrylate.
Claim 25
Dependent Claim
76 words
A process of making a plastic composition in accordance with claim 1 in which about 7.0 to 9.0 parts of said nonionic water soluble polyacrylamide polyelectrolyte and about 1.0 to 3.0 parts of said cationic polyelectrolyte constituting a total of about 10 parts of said polyelectrolytes is mixed with about 10 to 11 parts of said propylene glycol, about 2 to 16 parts of glycerine and a small amount of water sufficient to facilitate gel formulation.
Claim 26
Dependent Claim
54 words
A process of making a plastic composition adapted for use in contact with the skin with comprises mixing an acrylic polyelectrolyte of the group consisting of nonionic water soluble polyacrylamide and a cationic water soluble acrylamide-beta methacrylyloxyethyltrimethylammonium methyl sulfate copolymer and mixtures thereof, with propylene glycol in an amount sufficient to form a gel.
Claim 27
Dependent Claim
54 words
A process of making a plastic composition adapted for use in contact with the skin with comprises mixing an acrylic polyelectrolyte of the group consisting of nonionic water soluble polyacrylamide and a cationic water soluble acrylamide-beta methacrylyloxyethyltrimethylammonium methyl sulfate copolymer and mixtures thereof, with propylene glycol in an amount sufficient to form a gel.
Claim 28
Dependent Claim
53 words
A process in accordance with claim 23 in which about 1.0 to 5.0 parts of said nonionic water soluble polyacrylamide and about 5.0 to 9.0 parts of said cationic water soluble polyacrylamide is used, said mixture consisting a total of about 10 parts with at least about 10 parts of said propylene glycol.
Claim 29
Dependent Claim
36 words
A process in accordance with claim 24 in which said nonionic polyacrylamide contains about 2% to 4% by wt. of copolymerized sodium acrylate and said cationic polyacrylamide contains about 10to 40% by weight of said sulfate.
Claim 30
Dependent Claim
30 words
A process in accordance with claim 24 in which about 2.0 to 16 parts of glycerine per 10 parts of said mixture and a small amount of water are used.
References Cited (Backward Citations)
US3490454A
Cited
US3877431A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |