US5066709A
Expired / Lapsed
US
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Bioadhesive composition
Assignee: ISP Investments LLC
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Filing: 1990-09-20
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Granted: 1991-11-19
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Expires: 2010-09-20
Abstract
Abstract This invention relates to superior bioadhesive compositions having time extended adhesive properties comprising a non-toxic carrier and a polymer having between about 45 and about 70 weight % of units having the structure ##STR1## between about 50 and about 30 weight % of units having the structure ##STR2## and 2 to 7 weight % of an amine salt containing a lactam functionally derived from A and/or B, wherein R is hydrogen, alkoxy, phenyl, carboxy or --N lactam having from 3 to 6 carbon atoms; R 1 is C 1 to C 6 alkylene and R 2 is C 2 to C 4 alkylene; said copolymer having a number average molecular weight of about 40,000 to about 500,000 and a relatively small particle size. The invention also relates to the method of synthesizing and using the above composition.
Inventors
- 👤 Ratan K. Chaudhuri
- 👤 Rama K. Haldar
- 👤 Balgopal Gangadharan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:25
CPC Classifications
A; A61; A61L; A61L24/00; A61L24/04; A61L24/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
113 words
A bioadhesive composition comprising a non-toxic carrier and a polymer comprising between about 45 and about 70 weight % of units having the structure ##STR9## between about 50 and about 30 weight % of units having the structure ##STR10## and 2 to 7 weight % of an amine salt containing a lactam functionality derived from A and/or B, wherein R is hydrogen, alkoxy, phenyl, carboxyl or --N lactam having from to 6 carbon atoms; R 1 is C 1 to C 6 alkylene and R 2 is C 2 to C 4 alkylene; said copolymer having a number average molecular weight of about 40,000 to about 500,000 and a relatively small particle size.
Claim 2
Dependent Claim
113 words
A bioadhesive composition comprising a non-toxic carrier and a polymer comprising between about 45 and about 70 weight % of units having the structure ##STR9## between about 50 and about 30 weight % of units having the structure ##STR10## and 2 to 7 weight % of an amine salt containing a lactam functionality derived from A and/or B, wherein R is hydrogen, alkoxy, phenyl, carboxyl or --N lactam having from to 6 carbon atoms; R 1 is C 1 to C 6 alkylene and R 2 is C 2 to C 4 alkylene; said copolymer having a number average molecular weight of about 40,000 to about 500,000 and a relatively small particle size.
Claim 3
Dependent Claim
18 words
The composition of claim 1 wherein said carrier is a mixture of an oil and a natural gum.
Claim 4
Dependent Claim
27 words
The composition of claim 2 wherein said carrier mixture contains an oil selected from the group of mineral oil, white petrolatum vegetable oil, glycerin, and paraffin oil.
Claim 5
Dependent Claim
17 words
The composition of claim 1, 2 or 3 wherein said carrier additionally contains carboxymethyl cellulose or polyvinylpyrrolidone.
Claim 6
Dependent Claim
17 words
The composition of claim 1, 2 or 3 wherein R of the polymer is methoxy or hydrogen.
Claim 7
Dependent Claim
26 words
The composition of claim 1, 2 or 3 wherein R is methoxy, R 1 is lower alkylene and R 2 is --C 3 H 6 --.
Claim 8
Dependent Claim
24 words
The composition of claim 1, 2 or 3 wherein the mole ratio of carrier to polymer is between about 2:1 and about b 1:8.
Claim 9
Dependent Claim
16 words
The composition of claim 7 wherein said mole ratio is between about 1:1 and about 1:4.
Claim 10
Dependent Claim
11 words
The composition of claim 1 wherein said composition is a paste.
Claim 11
Dependent Claim
11 words
The composition of claim 1 wherein said composition is a powder.
Claim 12
Dependent Claim
43 words
A polymeric product having random distribution comprised of (a) 50-70 weight % of units ##STR11## (b) 50-30 weight % of units ##STR12## and (c) 2 to 7 weight % of ammonium salt of said unit A and/or B defined by the formulae ##STR13##
Claim 13
Dependent Claim
43 words
A polymeric product having random distribution comprised of (a) 50-70 weight % of units ##STR11## (b) 50-30 weight % of units ##STR12## and (c) 2 to 7 weight % of ammonium salt of said unit A and/or B defined by the formulae ##STR13##
Claim 14
Dependent Claim
38 words
The polymeric product of claim 11 wherein the product comprises a major portion of unit A, at least 20 weight % of unit C and between about 3 and about 5 weight % of said ammonium salt unit.
Claim 15
Dependent Claim
49 words
The polymeric product of claim 11 wherein the product comprises a major portion of unit A, at least 30 weight % of unit C, between about 0 and about 20 weight % of unit B and between about 3 and about 5 weight % of said ammonium salt unit.
References Cited (Backward Citations)
US3061569A
Cited
US3736274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-18 | 1995-05-20 | 1995-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-18 | 1999-05-20 | 1999-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-18 | 2003-05-20 | 2003-11-19 | $7700.00 | Window Closed / Lapsed |