US4684439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Creping adhesives containing polyvinyl alcohol and thermoplastic polyamide resins derived from poly(oxyethylene) diamine
Assignee: Kimberly Clark Worldwide Inc
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Filing: 1986-10-08
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Granted: 1987-08-04
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Expires: 2006-10-08
Abstract
Abstract An improved wettable creping adhesive comprises an aqueous admixture of polyvinyl alcohol and a water-soluble thermoplastic polyamide resin comprising the reaction product of a polyalkylene polyamine, a saturated aliphatic dibasic carboxylic acid, and a poly(oxyethylene) diamine.
Inventors
- 👤 Dave A. Soerens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:36
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/146; C; C08; C08L; C08L29/00; C08L29/02; C08L29/04; C08L77/00; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/36; D21H17/46; D21H17/54; D21H17/55
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
136 words
A method of creping cellulosic webs comprising: (a) applying to a rotating creping cylinder an aqueous admixture containing from about 90 to about 99.95 weight percent water and from about 0.05 to about 10 weight percent solids, wherein from about 20 to about 90 weight percent of said solids is water-soluble polyvinyl alcohol and wherein from about 10 to about 80 weight percent of said solids is a water-soluble, thermoplastic polyamide resin which is phase-compatible with the polyvinyl alcohol, said polyamide resin comprising the reaction product of a polyalkylene polyamine, a saturated aliphatic dibasic carboxylic acid, and a poly(oxyethylene) diamine; (b) pressing a cellulosic web against the creping cylinder to effect adhesion of the web to the surface of the cylinder; and (c) dislodging the web from the creping cylinder by contact with a doctor blade.
Claim 2
Independent Claim
136 words
A method of creping cellulosic webs comprising: (a) applying to a rotating creping cylinder an aqueous admixture containing from about 90 to about 99.95 weight percent water and from about 0.05 to about 10 weight percent solids, wherein from about 20 to about 90 weight percent of said solids is water-soluble polyvinyl alcohol and wherein from about 10 to about 80 weight percent of said solids is a water-soluble, thermoplastic polyamide resin which is phase-compatible with the polyvinyl alcohol, said polyamide resin comprising the reaction product of a polyalkylene polyamine, a saturated aliphatic dibasic carboxylic acid, and a poly(oxyethylene) diamine; (b) pressing a cellulosic web against the creping cylinder to effect adhesion of the web to the surface of the cylinder; and (c) dislodging the web from the creping cylinder by contact with a doctor blade.
Claim 3
Dependent Claim
30 words
The method of claim 1 wherein the poly(oxyethylene) diamine has the following formula: ##STR2## wherein "a" and "c" are each 1 or 2 and "b" is from 5 to 50.
Claim 4
Dependent Claim
29 words
The method of claim 2 wherein the polyalkylene polyamine has the following formula: NH.sub.2 (C.sub.n H.sub.2n HN).sub.x H wherein "n" and "x" are each integers of 2 or more.
Claim 5
Dependent Claim
30 words
The method of claim 3 wherein the saturated aliphatic dibasic carboxylic acid has the formula: HOOC--R--COOH wherein "R" is a divalent aliphatic radical having from 1 to 8 carbon atoms.
Claim 6
Dependent Claim
31 words
The method of claim 1 wherein the poly(oxyethylene) diamine has the formula: ##STR3## wherein "a" and "c" are each 1 or 2 and "b" has an average value of about 8.5.
Claim 7
Dependent Claim
22 words
The method of claim 5 wherein the polyalkylene polyamine is diethylene triamine and the saturated aliphatic dibasic carboxylic acid is adipic acid.
Claim 8
Dependent Claim
20 words
The method of claim 6 wherein the amount of water-soluble thermoplastic polyamide is about 25 weight percent of the solids.
References Cited (Backward Citations)
US3640841A
Cited
US4501640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-03 | 1991-02-02 | 1991-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-03 | 1995-02-02 | 1995-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-03 | 1999-02-02 | 1999-08-04 | $7700.00 | Window Closed / Lapsed |