US4317756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sizing composition comprising a hydrophobic cellulose-reactive sizing agent and a cationic polymer
Assignee: Hercules LLC
•
Filing: 1980-08-22
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Granted: 1982-03-02
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Expires: 2000-08-22
Abstract
Abstract Disclosed is a sizing composition in the form of an aqueous emulsion comprising a hydrophobic cellulose-reactive sizing agent, such as a ketene dimer, and a cationic polymer selected from the group consisting of (1) a cationic polymer obtained by reacting an epihalohydrin with a condensate derived by condensing dicyandiamide or cyanamide with bis-aminopropylpiperazine and (2) a cationic polymer obtained by condensing an epihalohydrin with bis-aminopropylpiperazine. The cationic polymer is a sizing accelerator for the sizing agent.
Inventors
- 👤 David H. Dumas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:27
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/17; C; C08; C08G; C08G73/00; C08G73/02; C08G73/0273; D21H17/20; D21H17/33; D21H17/46; D21H17/54; D21H17/55
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
68 words
A sizing composition in the form of an aqueous emulsion comprising (A) a hydrophobic cellulose-reactive sizing agent and (B) a sufficient amount of a sizing accelerator of a cationic polymer selected from the group consisting of (1) a cationic polymer obtained by reacting an epihalohydrin with a condensate derived by condensing dicyandiamide or cyanamide with bis-aminopropylpiperazine and (2) a cationic polymer obtained by condensing an epihalohydrin with bis-aminopropylpiperazine.
Claim 2
Dependent Claim
68 words
A sizing composition in the form of an aqueous emulsion comprising (A) a hydrophobic cellulose-reactive sizing agent and (B) a sufficient amount of a sizing accelerator of a cationic polymer selected from the group consisting of (1) a cationic polymer obtained by reacting an epihalohydrin with a condensate derived by condensing dicyandiamide or cyanamide with bis-aminopropylpiperazine and (2) a cationic polymer obtained by condensing an epihalohydrin with bis-aminopropylpiperazine.
Claim 3
Dependent Claim
21 words
The sizing composition of claim 1 wherein the sizing agent is a ketene dimer and the cationic polymer is polymer (1).
Claim 4
Dependent Claim
16 words
The sizing composition of claim 2 wherein the epihalohydrin of the cationic polymer (1) is epichlorohydrin.
Claim 5
Dependent Claim
21 words
The sizing composition of claim 1 wherein the sizing agent is a ketene dimer and the cationic polymer is polymer (2).
Claim 6
Dependent Claim
16 words
The sizing composition of claim 4 wherein the epihalohydrin of the cationic polymer (2) is epichlorohydrin.
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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) | 1985-03-01 | 1985-08-31 | 1986-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-01 | 1989-08-31 | 1990-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-01 | 1993-08-31 | 1994-03-02 | $7700.00 | Window Closed / Lapsed |