Patent US4510197A successfully refreshed from Google Patents.
US4510197A
Expired / Lapsed
US
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Water vapor permeable pressure sensitive adhesives incorporating modified acrylate copolymers
Assignee: Kendall Co
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Filing: 1983-04-01
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Granted: 1985-04-09
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Expires: 2003-04-01
Abstract
Abstract The present invention comprises a water vapor permeable, pressure-sensitive adhesive composition useful for surgical and medical bandage applications, and incorporating modified copolymers of butyl acrylate containing N-vinyl 2-pyrrolidone and acrylic acid. The present pressure-sensitive adhesive composition results in enhanced water vapor transmission rates, which may lead to a concomittant reduction in skin lesions that were previously attendant upon the accumulation of water under conventional inadequately permeable pressure-sensitive adhesive-coated surgical and medical dressings.
Inventors
- 👤 Kishore R. Shah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:31
CPC Classifications
C; C09; C09J; C09J139/00; C09J139/04; C09J139/06; A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/58; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1804; C09J133/00; C09J133/04; C09J133/06; C09J133/08; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/385; C09J2301/00; C09J2301/30; C09J2301/302
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
157 words
A water vapor permeable, pressure-sensitive adhesive composition comprising: an adhesive copolymer having a molecular weight from about 200,000 to about 500,000, further comprising: (a) from about 79 to 89 percent by weight of n-butyl acrylate; (b) from about 10 to 20 percent by weight of a hydrophilic N-vinyl lactam, selected from the group consisting of 1-vinyl-2-pyrrolidone, 1-vinyl-5-methyl-2-pyrrolidone, 1-vinyl-2-piperidinone and 1-vinyl-ε-caprolactum; and (c) from about 1 to 5 percent by weight of an acidic comonomer selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, and 2-sulfoethyl methacrylate; and said adhesive copolymer in the form of a coating of about 1.0 mil thickness having water vapor transmission rates of greater than 1,000 gms/meter 2 /24 hours at 40° C. and 80 percent relative humidity; and further exhibiting a probe tack value of about 130 mg/cm 2 , adhesion to steel of about 26.5 oz/inch width, and flat bar creep at 100° F. of about 4.5 hours.
Claim 2
Dependent Claim
157 words
A water vapor permeable, pressure-sensitive adhesive composition comprising: an adhesive copolymer having a molecular weight from about 200,000 to about 500,000, further comprising: (a) from about 79 to 89 percent by weight of n-butyl acrylate; (b) from about 10 to 20 percent by weight of a hydrophilic N-vinyl lactam, selected from the group consisting of 1-vinyl-2-pyrrolidone, 1-vinyl-5-methyl-2-pyrrolidone, 1-vinyl-2-piperidinone and 1-vinyl-ε-caprolactum; and (c) from about 1 to 5 percent by weight of an acidic comonomer selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, and 2-sulfoethyl methacrylate; and said adhesive copolymer in the form of a coating of about 1.0 mil thickness having water vapor transmission rates of greater than 1,000 gms/meter 2 /24 hours at 40° C. and 80 percent relative humidity; and further exhibiting a probe tack value of about 130 mg/cm 2 , adhesion to steel of about 26.5 oz/inch width, and flat bar creep at 100° F. of about 4.5 hours.
Claim 3
Dependent Claim
120 words
The water vapor permeable, pressure-sensitive adhesive composition of claim 1 comprising an adhesive copolymer, further comprising: (a) from about 79 to 89 percent by weight of n-butyl acrylate; (b) from about 10 to 20 percent by weight of N-vinyl-2-pyrrolidone; and (c) from about 1 to 5 percent by weight of acrylic acid; and said adhesive copolymer in the form of a coating of about 1.0 mil thickness, having water vapor transmission rates of greater than 1,000 gms/meter 2 /24 hours at 40° C. and 80 percent relative humidity; and further exhibiting a probe tack value of about 130 mg/cm 2 , adhesion to steel of about 26.5 oz/inch width, and flat bar creep at 100° F. of about 4.5 hours.
Claim 4
Dependent Claim
16 words
A water vapor permeable, pressure-sensitive adhesive, according to claim 1, wherein the N-vinyl lactam is N-vinyl-2-pyrrolidone.
Claim 5
Dependent Claim
118 words
A water vapor permeable, pressure-sensitive adhesive composition comprising an adhesive copolymer having a molecular weight from about 200,000 to about 500,000, further comprising: (a) about 84 percent by weight of n-butyl acrylate; (b) about 13 percent by weight of N-vinyl-2-pyrrolidone; and (c) about 3 percent by weight of acrylic acid; and said adhesive copolymer in the form of a coating of about 1.0 mil thickness having water vapor transmission rates of greater than 1,000 gms/meter 2 /24 hours at 40° C. and 80 percent relative humidity; and further exhibiting a probe tack value of about 130 mg/cm 2 , adhesion to steel of about 26.5 oz/inch width, and flat bar creep at 100° F. of about 4.5 hours.
Claim 6
Dependent Claim
118 words
A water vapor permeable, pressure-sensitive adhesive composition comprising an adhesive copolymer having a molecular weight from about 200,000 to about 500,000, further comprising: (a) about 84 percent by weight of n-butyl acrylate; (b) about 13 percent by weight of N-vinyl-2-pyrrolidone; and (c) about 3 percent by weight of acrylic acid; and said adhesive copolymer in the form of a coating of about 1.0 mil thickness having water vapor transmission rates of greater than 1,000 gms/meter 2 /24 hours at 40° C. and 80 percent relative humidity; and further exhibiting a probe tack value of about 130 mg/cm 2 , adhesion to steel of about 26.5 oz/inch width, and flat bar creep at 100° F. of about 4.5 hours.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1988-04-08 | 1988-10-08 | 1989-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-08 | 1992-10-08 | 1993-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-08 | 1996-10-08 | 1997-04-09 | $7700.00 | Window Closed / Lapsed |