US4603176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temporary wet strength resins
Assignee: Procter and Gamble Co
•
Filing: 1985-06-25
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Granted: 1986-07-29
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Expires: 2005-06-25
Abstract
Abstract Temporary wet strength resin polymers having the formula <IMAGE> wherein A is a polar, non-nucleophilic unit which does not cause said resin polymer to become water-insoluble; B is a hydrophilic, cationic unit which inparts a positive charge to the resin polymer; each R is H, C1-C4 alkyl or halogen; wherein the mole percent of W is from about 5% to about 95%; the mole percent of X is from about 3% to about 65%; the mole percent of Y is from about 1% to about 20%; and the mole percent of Z is from about 1% to about 10%; said resin polymer having a molecular weight of from about 5,000 to about 200,000. These resins, when incorporated into paper products provide good dry and initial wet tensile strength together with excellent wet tensile decay.
Inventors
- 👤 David W. Bjorkquist
- 👤 William W. Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:58
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/28; C08F220/00; C08F220/02; C08F220/52; C08F220/54; C08F220/56; C08F2810/00; C08F2810/20
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
116 words
Temporary wet strength resin polymers having the formula ##STR19## wherein A is a polar, non-nucleophilic unit which does not cause said resin polymer to become water-insoluble; B is a hydrophilic, cationic unit which imparts a positive charge to the resin polymer; each R is H, C 1 -C 4 alkyl or halogen; wherein the mole percent of W is from about 58% to about 95%; the mole percent of X is from about 3% to about 65%; the mole percent of Y is from about 1% to about 20%; and the mole percent of Z is from about 1% to about 10%; said resin polymer having a molecular weight of from about 5,000 to about 200,000.
Claim 2
Dependent Claim
116 words
Temporary wet strength resin polymers having the formula ##STR19## wherein A is a polar, non-nucleophilic unit which does not cause said resin polymer to become water-insoluble; B is a hydrophilic, cationic unit which imparts a positive charge to the resin polymer; each R is H, C 1 -C 4 alkyl or halogen; wherein the mole percent of W is from about 58% to about 95%; the mole percent of X is from about 3% to about 65%; the mole percent of Y is from about 1% to about 20%; and the mole percent of Z is from about 1% to about 10%; said resin polymer having a molecular weight of from about 5,000 to about 200,000.
Claim 3
Dependent Claim
19 words
Temporary wet strength resin polymers according to claim 1 wherein A is selected from the group consisting of ##STR20##
Claim 4
Dependent Claim
47 words
Temporary wet strength resin polymers according to claim 2 wherein the cationic monomer containing the unit B is selected from the group consisting of 2-vinyl-N-methylpyridinium chloride, diallyldimethyl ammonium chloride, p-vinylphenyltrimethyl ammonium chloride, 2-(dimethylamino)ethyl acrylate, trimethyl(p-vinylbenzyl)ammonium chloride, p-dimethylaminoethyl styrene, dimethylaminopropyl acrylamide, 2-methylacryloyloxyethyltrimethyl ammonium methylsulfate and 3-acrylamido-3-methylbutyltrimethyl ammonium chloride.
Claim 5
Dependent Claim
17 words
Temporary wet strength resin polymers according to claim 3 wherein R is H or CH 3 .
Claim 6
Dependent Claim
42 words
Temporary wet strength resin polymers according to claim 4 wherein W is from about 30% to about 85%; X from about 9% to about 60%; Y is from about 5% to about 20%; and Z is from about 1% to about 5%.
Claim 7
Dependent Claim
13 words
Temporary wet strength resin polymers according to claim 5 wherein A is ##STR21##
Claim 8
Dependent Claim
20 words
Temporary wet strength resin polymers according to claim 6 having a molecular weight of from about 5,000 to about 112,000.
Claim 9
Dependent Claim
16 words
Temporary wet strength resin polymers according to claim 7 selected from the group consisting of ##STR22##
Claim 10
Dependent Claim
22 words
A cellulosic fibrous non-woven web comprising from about 0.005% to about 2% of the temporary wet strength resin polymer of claim 1.
Claim 11
Dependent Claim
22 words
A cellulosic fibrous non-woven web comprising from about 0.005% to about 2% of the temporary wet strength resin polymer of claim 8.
Claim 12
Dependent Claim
16 words
A cellulosic fibrous non-woven web according to claim 9 wherein said non-woven web is tissue paper.
Claim 13
Dependent Claim
16 words
A cellulosic fibrous non-woven web according to claim 10 wherein said non-woven web is tissue paper.
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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) | 1989-07-28 | 1990-01-27 | 1990-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-28 | 1994-01-27 | 1994-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-28 | 1998-01-27 | 1998-07-29 | $7700.00 | Window Closed / Lapsed |