US4035229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper strengthened with glyoxal modified poly(β-alanine) resins
Assignee: Hercules LLC
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Filing: 1976-01-28
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Granted: 1977-07-12
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Expires: 1996-01-28
Abstract
Abstract Novel resins, useful as strengthening resins for imparting dry and temporary wet strength to paper, are disclosed. The resins are prepared by reacting branched water-soluble poly( beta -alanine) with glyoxal.
Inventors
- 👤 Terence W. Rave
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:31
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54; D21H21/00; D21H21/14; D21H21/18; D21H21/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
116 words
The process of treating paper which comprises treating the cellulose fibers of said paper with from 0.05 to 2% by weight, based on the weight of the cellulose fibers of a water-soluble dry strength and temporary wet strength resin in aqueous solution, said resin comprising the reaction product of a branched, water-soluble poly(β -alanine) having a molecular weight in the range of about 500 to about 10,000 with from about 10 to about 100 mole %, based on the amide repeating units of the poly(β-alanine) of glyoxal, said poly(β-alanine) having been prepared by the anionic polymerization of acrylamide in a suitable organic reaction medium inert to the reaction conditions in the presence of a basic catalyst.
Claim 2
Dependent Claim
116 words
The process of treating paper which comprises treating the cellulose fibers of said paper with from 0.05 to 2% by weight, based on the weight of the cellulose fibers of a water-soluble dry strength and temporary wet strength resin in aqueous solution, said resin comprising the reaction product of a branched, water-soluble poly(β -alanine) having a molecular weight in the range of about 500 to about 10,000 with from about 10 to about 100 mole %, based on the amide repeating units of the poly(β-alanine) of glyoxal, said poly(β-alanine) having been prepared by the anionic polymerization of acrylamide in a suitable organic reaction medium inert to the reaction conditions in the presence of a basic catalyst.
Claim 3
Dependent Claim
152 words
The process of treating paper which comprises treating the cellulose fibers of said paper with from 0.05 to 2% by dry weight based on the weight of the cellulose fibers of a mixture of (1) an aqueous solution of an anionic water-soluble dry strength and temporary wet strength resin comprising the reaction product of a partially hydrolyzed branched water-soluble poly(β-alanine) having a molecular weight in the range of about 500 to about 10,000 with from about 10 to about 100 mole %, based on the amide repeating units of the poly(β-alanine) of glyoxal, said polyβ-alanine having been prepared by the anionic polymerization of acrylamide in a suitable organic reaction medium inert to the reaction conditions, in the presence of a basic catalyst and partially hydrolyzed to introduce from about 1 to about 10 mole % of anionic groups, based on amide repeating units, and (2) an aqueous solution of a polyamine-polyamide-epichlorohydrin resin.
Claim 4
Dependent Claim
152 words
The process of treating paper which comprises treating the cellulose fibers of said paper with from 0.05 to 2% by dry weight based on the weight of the cellulose fibers of a mixture of (1) an aqueous solution of an anionic water-soluble dry strength and temporary wet strength resin comprising the reaction product of a partially hydrolyzed branched water-soluble poly(β-alanine) having a molecular weight in the range of about 500 to about 10,000 with from about 10 to about 100 mole %, based on the amide repeating units of the poly(β-alanine) of glyoxal, said polyβ-alanine having been prepared by the anionic polymerization of acrylamide in a suitable organic reaction medium inert to the reaction conditions, in the presence of a basic catalyst and partially hydrolyzed to introduce from about 1 to about 10 mole % of anionic groups, based on amide repeating units, and (2) an aqueous solution of a polyamine-polyamide-epichlorohydrin resin.
Claim 5
Dependent Claim
151 words
The process of treating paper which comprises treating the cellulose fibers of said paper with from 0.05 to 2% by weight based on the weight of the cellulose fibers of a cationic water-soluble dry strength and temporary wet strength resin in aqueous solution said resin comprising the reaction product of a cationic, branched, water-soluble poly(β-alanine) having a molecular weight in the range of from about 500 to about 10,000 with from about 10 to about 100 mole %, based on the amide repeating units of the poly(β-alanine) of glyoxal, wherein said cationic, branched, water-soluble poly(β-alanine) was produced by the anionic polymerization of acrylamide in a suitable organic reaction medium inert to the reaction conditions in the presence of a basic catalyst and the reaction of the polymerized acrylamide with sufficient dimethylamine and formaldehyde to introduce from about 2 to about 15 mole % of cationic groups, based on amide repeating units.
Claim 6
Dependent Claim
151 words
The process of treating paper which comprises treating the cellulose fibers of said paper with from 0.05 to 2% by weight based on the weight of the cellulose fibers of a cationic water-soluble dry strength and temporary wet strength resin in aqueous solution said resin comprising the reaction product of a cationic, branched, water-soluble poly(β-alanine) having a molecular weight in the range of from about 500 to about 10,000 with from about 10 to about 100 mole %, based on the amide repeating units of the poly(β-alanine) of glyoxal, wherein said cationic, branched, water-soluble poly(β-alanine) was produced by the anionic polymerization of acrylamide in a suitable organic reaction medium inert to the reaction conditions in the presence of a basic catalyst and the reaction of the polymerized acrylamide with sufficient dimethylamine and formaldehyde to introduce from about 2 to about 15 mole % of cationic groups, based on amide repeating units.
Claim 7
Dependent Claim
103 words
Paper treated with from 0.05 to 2% by weight, based on the weight of the cellulose fibers of the paper, of a water-soluble dry strength and temporary wet strength resin, said resin comprising the reaction product of a branched water-soluble poly(β-alanine) having a molecular weight in the range of about 500 to about 10,000 with from about 10 to about 100 mole %, based on the amide repeating units of the poly(β-alanine) of glyoxal, said poly(β-alanine) having been prepared by the anionic polymerization of acrylamide in a suitable organic reaction medium inert to the reaction conditions in the presence of a basic catalyst.
Claim 8
Dependent Claim
103 words
Paper treated with from 0.05 to 2% by weight, based on the weight of the cellulose fibers of the paper, of a water-soluble dry strength and temporary wet strength resin, said resin comprising the reaction product of a branched water-soluble poly(β-alanine) having a molecular weight in the range of about 500 to about 10,000 with from about 10 to about 100 mole %, based on the amide repeating units of the poly(β-alanine) of glyoxal, said poly(β-alanine) having been prepared by the anionic polymerization of acrylamide in a suitable organic reaction medium inert to the reaction conditions in the presence of a basic catalyst.
Claim 9
Dependent Claim
128 words
Paper treated with from 0.05 to 2% by weight, based on the weight of the cellulose fibers of the paper, of an anionic water-soluble dry strength and temporary wet strength resin, said resin comprising the reaction product of a partially hydrolyzed branched water-soluble poly(β-alanine) having a molecular weight in the range of about 500 to about 10,000 with from about 10 to about 100 mole %, based on the amide repeating units of the poly(β-alanine) of a glyoxal, said poly(β-alanine) having been prepared by the anionic polymerization of acrylamide in a suitable organic reaction medium inert to the reaction conditions in the presence of a basic catalyst and partially hydrolyzed to introduce from about 1 to about 10 mole % of anionic groups, based on amide repeating units.
Claim 10
Dependent Claim
128 words
Paper treated with from 0.05 to 2% by weight, based on the weight of the cellulose fibers of the paper, of an anionic water-soluble dry strength and temporary wet strength resin, said resin comprising the reaction product of a partially hydrolyzed branched water-soluble poly(β-alanine) having a molecular weight in the range of about 500 to about 10,000 with from about 10 to about 100 mole %, based on the amide repeating units of the poly(β-alanine) of a glyoxal, said poly(β-alanine) having been prepared by the anionic polymerization of acrylamide in a suitable organic reaction medium inert to the reaction conditions in the presence of a basic catalyst and partially hydrolyzed to introduce from about 1 to about 10 mole % of anionic groups, based on amide repeating units.
Claim 11
Dependent Claim
138 words
Paper treated with from 0.05 to 2% by weight, based on the weight of the cellulose fibers of the paper, of a cationic water-soluble dry strength and temporary wet strength resin, said resin comprising the reaction product of a cationic, branched, water-soluble poly(β-alanine) having a molecular weight in the range of about 500 to about 10,000 with from about 10 to about 100 mole % based on the amide repeating units of the poly(β-alanine) of glyoxal, wherein said cationic, branched, water-soluble poly(β-alanine) was produced by the anionic polymerization of acrylamide in a suitable organic reaction medium inert to the reaction conditions in the presence of a basic catalyst and the reaction of the polymerized acrylamide with sufficient dimethylamine and formaldehyde to introduce from about 2 to about 15 mole % of cationic groups, based on amide repeating units.
Claim 12
Dependent Claim
138 words
Paper treated with from 0.05 to 2% by weight, based on the weight of the cellulose fibers of the paper, of a cationic water-soluble dry strength and temporary wet strength resin, said resin comprising the reaction product of a cationic, branched, water-soluble poly(β-alanine) having a molecular weight in the range of about 500 to about 10,000 with from about 10 to about 100 mole % based on the amide repeating units of the poly(β-alanine) of glyoxal, wherein said cationic, branched, water-soluble poly(β-alanine) was produced by the anionic polymerization of acrylamide in a suitable organic reaction medium inert to the reaction conditions in the presence of a basic catalyst and the reaction of the polymerized acrylamide with sufficient dimethylamine and formaldehyde to introduce from about 2 to about 15 mole % of cationic groups, based on amide repeating units.
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) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |