US4701509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-vinyl caprolactam-containing hot melt adhesives
Assignee: Ethicon Inc
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Filing: 1984-09-17
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Granted: 1987-10-20
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Expires: 2004-09-17
Abstract
Abstract Novel acrylate, hot melt, pressure-sensitive adhesives are disclosed which are polymerized compositions of: -Starting Monomer %, by Polymer Weight -2-ethylhexyl acrylate (2-EHA) 20-80 -n-butyl acrylate (BA) 0-45 -isobutyl methacrylate (IBMA) 15-25 -N-vinyl caprolactam (NVCL) 10-25 - useful for medical products such as ostomy seals, adhesive tapes and bandages, wound drainage adhesive seals, wound dressings and the like that adhere well to human skin even under moist conditions.
Inventors
- 👤 Robert L. Sun
- 👤 James F. Kenney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:13
CPC Classifications
C; C09; C09J; C09J139/00; C09J139/04; A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/58; A61L26/00; A61L26/0009; A61L26/0014; C09J133/00; C09J133/04; C09J133/06; C09J133/062
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
40 words
A hot melt pressure-sensitive adhesive, suitable for medical use, consisting of a polymerized composition of 20 to 80 percent 2-ethylhexyl acrylate, 0 to 45 percent n-butyl acrylate, 15 to 25 percent isobutyl methacrylate and 10 to 25 percent N-vinyl caprolactam.
Claim 2
Dependent Claim
40 words
A hot melt pressure-sensitive adhesive, suitable for medical use, consisting of a polymerized composition of 20 to 80 percent 2-ethylhexyl acrylate, 0 to 45 percent n-butyl acrylate, 15 to 25 percent isobutyl methacrylate and 10 to 25 percent N-vinyl caprolactam.
Claim 3
Dependent Claim
39 words
A hot melt adhesive according to claim 11 wherein the polymerized composition consists of 30 to 65 percent 2-ethylhexyl acrylate, 0 to 35 percent n-butyl acrylate, 15 to 25 percent isobutyl methacrylate and 15 to 20 percent N-vinyl caprolactam.
Claim 4
Dependent Claim
16 words
A hot melt adhesive according to claim 12, having a Williams Plasticity Number above 1.5 mm.
Claim 5
Dependent Claim
20 words
A hot melt adhesive according to claim 12, having a melt viscosity at 350° F. from 40,000 to 350,000 cps.
Claim 6
Dependent Claim
12 words
A hot melt adhesive according to claim 3, which has been sterilized.
Claim 7
Dependent Claim
39 words
A hot melt adhesive according to claim 3 wherein the polymerized composition consists of 35 to 50 percent 2-ethylhexyl acrylate, 15 to 35 percent n-butyl acrylate, 15 to 25 percent isobutyl methacrylate, and 15 to 20 percent N-vinyl caprolactam.
Claim 8
Dependent Claim
31 words
A hot melt adhesive according to claim 6 wherein the polymerized composition consists of 45 percent 2-ethylhexyl acrylate, 20 percent n-butyl acrylate, 20 percent isobutyl methacrylate, and 15 percent N-vinyl caprolactam.
Claim 9
Dependent Claim
18 words
A hot melt adhesive according to claim 7, having a Williams Plasticity Number of 1.5 to 2.5 mm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-19 | 1991-04-20 | 1991-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-19 | 1995-04-20 | 1995-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-19 | 1999-04-20 | 1999-10-20 | $7700.00 | Window Closed / Lapsed |