US3674725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cationization of starch for filler retention utilizing a cationic polyepihalohydrin-tertiary amine polymer
Assignee: ChampionX LLC
•
Filing: 1970-12-18
•
Granted: 1972-07-04
•
Expires: 1990-12-18
Abstract
Abstract A method of cationization of starch is disclosed which involves reacting starch at alkaline conditions with a polymer formed from polyepichlorohydrin and an amine.
Inventors
- 👤 Thomas Aitken
- 👤 Donald R Anderson
- 👤 Myron J Jursich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:07
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08; C08B31/12; C08B31/125
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
10 words
The method of claim 1 wherein the polyepihalohydrin is polyepichlorohydrin.
Claim 2
Dependent Claim
16 words
The method of claim 2 wherein the polyepichlorohydrin has a molecular weight from 1,000 to 100,000.
Claim 3
Dependent Claim
17 words
The method of claim 2 wherein the polyepichlorohydrin has a molecular weight of from 2,500 to 25,000.
Claim 4
Dependent Claim
28 words
The method of claim 2 wherein the amine is selected from the group consisting of trimethyl amine, dimethyl amine, pyridine, dibasic acid amines, ethylenimine, and dimethyl ethanol amine.
Claim 5
Dependent Claim
11 words
The method of claim 2 wherein the amine is trimethyl amine.
Claim 6
Dependent Claim
22 words
The method of claim 2 wherein the molar ratio of amine to chlorine equivalent of polyepichlorohydrin is from about 0.2:1 to 0.8:1.
Claim 7
Dependent Claim
21 words
The method of claim 1 wherein the cationic polymer is produced from the partial quaternization of polyepichlorohydrin and a trialkyl amine.
Claim 8
Dependent Claim
15 words
The method of claim 1 wherein the quaternization is from 15 to 80 percent complete.
Claim 9
Dependent Claim
39 words
A process of improving the retention of starch on paper pulp which comprises adding to the starch under alkaline conditions from 0.1 to 10.0 percent of a cationic polymer formed by the quaternization of polyepichlorohydrin with a tertiary amine.
Claim 10
Dependent Claim
38 words
A process of increasing filler retention of starch which comprises adding to the starch under alkaline conditions at the wet end of a papermaking system a cationic polymer formed by the quaternization of polyepichlorohydrin with a tertiary amine.
Claim 11
Dependent Claim
16 words
The process of claim 11 wherein the polyepichlorohydrin has a molecular weight from 1,000 to 100,000.
Claim 12
Dependent Claim
17 words
The process of claim 11 wherein the polyepichlorohydrin has a molecular weight of from 2,500 to 25,000.
Claim 13
Dependent Claim
28 words
The process of claim 11 wherein the amine is selected from the group consisting of trimethyl amine, dimethyl amine, pyridine, dibasic acid amines, ethylenimine, and dimethyl ethanol amine.
Claim 14
Dependent Claim
11 words
The process of claim 11 wherein the amine is trimethyl amine.
Claim 15
Dependent Claim
22 words
The process of claim 11 wherein the molar ratio of amine to chlorine equivalent of polyepichlorohydrin is from about 0.2:1 to 0.8:1.
Claim 16
Dependent Claim
21 words
The process of claim 11 wherein the Cationic polymer is produced from the partial quaternization of polyepichlorohydrin and a trialkyl amine.
Claim 17
Dependent Claim
15 words
The process of claim 11 wherein the quaternization is from 15 to 80 percent complete.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |