US4156775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary ammonium salts of epihalohydrin polymers as additives for fibrous materials
Assignee: Dow Chemical Co
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Filing: 1976-01-26
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Granted: 1979-05-29
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Expires: 1996-01-26
Abstract
Abstract Properties of fibrous materials, e.g., wet and dry strength of paper, are significantly improved by incorporating a cationic polyether into a fibrous material such as pulp. The polyether bears ammonium salt groups exemplified by the formula: ##STR1## wherein R 1 and R 2 are individually hydrogen, hydrocarbyl such as alkyl, hydroxyhydrocarbyl, or hydrocarbylamino; E is individually ##STR2## or E and R 1 are collectively ##STR3## wherein R is hydrogen or alkyl, R 3 is hydroxyl, halogen, hydrogen or hydrocarbyl, R 4 is hydrogen or hydrocarbyl; and A.sup.⊖ is an anion of an ammonium salt. Such polyethers also function as retention aids for sizing agents and dyes and as antistatic agents.
Inventors
- 👤 Syamalarao Evani
- 👤 George R. Killat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:31
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/333; C08G65/33303; C08G65/33306
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
116 words
A cationic polyether bearing pendant ammonium salt groups, said polyether having repeating monomeric units represented by the formula: ##STR23## wherein each R 1 is individually hydrogen and each R 2 is individually hydrogen, hydrocarbyl, hydroxyhydrocarbyl or aminohydrocarbyl wherein amino is a secondary or tertiary amino; each E is individually a monovalent hydrocarbon radical bearing an epoxy group or a group or groups capable of being converted to an epoxy group or E and R 1 are collectively a propylene or substituted propylene radical wherein the terminal substituents are C 1 -C 3 alkyl and the β-carbon substituents are hydroxy, halogen, hydrocarbyl, or hydroxyhydrocarbyl; Y is alkylene and A.sup.⊖ represents any anion common to conventional ammonium salts.
Claim 2
Dependent Claim
116 words
A cationic polyether bearing pendant ammonium salt groups, said polyether having repeating monomeric units represented by the formula: ##STR23## wherein each R 1 is individually hydrogen and each R 2 is individually hydrogen, hydrocarbyl, hydroxyhydrocarbyl or aminohydrocarbyl wherein amino is a secondary or tertiary amino; each E is individually a monovalent hydrocarbon radical bearing an epoxy group or a group or groups capable of being converted to an epoxy group or E and R 1 are collectively a propylene or substituted propylene radical wherein the terminal substituents are C 1 -C 3 alkyl and the β-carbon substituents are hydroxy, halogen, hydrocarbyl, or hydroxyhydrocarbyl; Y is alkylene and A.sup.⊖ represents any anion common to conventional ammonium salts.
Claim 3
Dependent Claim
20 words
The polyether of claim 1 having a weight average molecular weight in the range from about 4,000 to about 500,000.
Claim 4
Dependent Claim
67 words
The polyether of claim 1 represented by the structure: ##STR24## wherein z is alkyleneoxy R 3 is hydrogen or the residue of an active hydrogen initiator, each R 4 is hydrogen, alkyl, aryl or tertiary amino, a, c and d are positive integers from 1 to 250, b is 0 or a positive integer from 1 to 125 provided a is at least as large as b.
Claim 5
Dependent Claim
68 words
The polyether of claim 1 wherein the polyether is represented by the formula ##STR25## wherein R 3 is hydrogen or the residue of an active hydrogen initiator, each R 4 is hydrogen, alkyl, aryl or tertiary amino, a, c and d are positive integers from 1 to 250, b is 0 or a positive integer from 1 to 125 provided a is at least as large as b.
Claim 6
Dependent Claim
47 words
The polyether of claim 4 wherein E and R 1 are collectively a propylene or substituted propylene radical represented by the formula: ##STR26## wherein R' is a hydrogen or C 1 -C 3 alkyl, R 3 ' is hydrogen or hydroxyl and R 4 ' is hydrogen.
Claim 7
Dependent Claim
20 words
The polyether of claim 2 wherein E is represented by the formula ##STR27## with each R' being hydrogen or methyl.
Claim 8
Dependent Claim
50 words
The polyether of claim 2 wherein E and R 1 are collectively a propylene or substituted propylene radical represented by the formula: ##STR28## wherein R' is hydrogen or C 1 -C 3 alkyl, R 3 ' is hydrogen, hydroxyl, halogen or hydrocarbyl and R 4 ' is hydrogen or hydrocarbyl.
Claim 9
Dependent Claim
17 words
The polyether of claim 1 bearing pendant epoxy groups represented by one of the following formulas: ##STR29##
References Cited (Backward Citations)
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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) | 1982-05-28 | 1982-11-27 | 1983-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-28 | 1986-11-27 | 1987-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-28 | 1990-11-27 | 1991-05-29 | $7700.00 | Window Closed / Lapsed |