Patent US4778813A successfully refreshed from Google Patents.
US4778813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric quaternary ammonium compounds, their preparation and use
Assignee: Buckman Laboratories International Inc
•
Filing: 1985-01-30
•
Granted: 1988-10-18
•
Expires: 2005-01-30
Abstract
Abstract Novel capped polymeric quaternary ammonium compositions formed by reacting ionene type polymers with tertiary amines are useful as microbicides, corrosion inhibitors, debonding agents, flocculants, softeners, and demulsifiers.
Inventors
- 👤 Joseph G. Fenyes
- 👤 John D. Pera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:27
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/088; A; A01; A01N; A01N33/00; A01N33/02; A01N33/12; C02; C02F; C02F1/00; C02F1/50; C02F1/52; C02F1/54; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/173; D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54; D21H17/56
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
93 words
A polymeric quaternary ammonium composition having the structure ##STR4## wherein R is methyl, ethyl, propyl, butyl, hydroxyethyl or hydroxypropyl; characterized in that R and R' are identical when R is ethyl, propyl, butyl, hydroxyethyl or hydroxypropyl and when R is methyl, R' is independently methyl, an alkyl group containing 5 to 22 carbon atoms having 0 to 2 carbon to carbon double bonds, cyclohexyl, benzyl or phenyl; and characterized further in that R and R' may form a pyridyl group; R" is ##STR5## and n is an odd number from 1 to 201.
Claim 2
Dependent Claim
93 words
A polymeric quaternary ammonium composition having the structure ##STR4## wherein R is methyl, ethyl, propyl, butyl, hydroxyethyl or hydroxypropyl; characterized in that R and R' are identical when R is ethyl, propyl, butyl, hydroxyethyl or hydroxypropyl and when R is methyl, R' is independently methyl, an alkyl group containing 5 to 22 carbon atoms having 0 to 2 carbon to carbon double bonds, cyclohexyl, benzyl or phenyl; and characterized further in that R and R' may form a pyridyl group; R" is ##STR5## and n is an odd number from 1 to 201.
Claim 3
Dependent Claim
89 words
The method of preparing the polymeric quaternary ammonium composition of claim 1 which comprises reacting X moles of N,N,N',N'-tetramethyl-N,N'-bis(3-chloro-2-hydroxypropyl)diethylether diammonium dichloride in the presence of water at 80° to 105° C. from 1 to 30 hours with X-1 moles of a ditertiary amine to form a precursor which is subsequently reacted in water or a polar organic solvent with two moles of a monotertiary amine per mole of precursor at a temperature of 25° to 110° C. for 1 to 30 hours wherein X varies from 2 to 101.
Claim 4
Dependent Claim
47 words
A method of flocculating solids from an aqueous system containing suspended or dissolved solids, which comprises adding to said aqueous system a flocculant comprising 1 or more of the polymeric quaternary ammonium compounds of claim 1 in an amount sufficient to cause the flocculation of said solids.
Claim 5
Dependent Claim
49 words
A method of improving the retention of dyes, water-proofing and flame-proofing materials in textiles during the finishing of textiles, which comprises adding to the finishing system one or more of the polymeric quaternary ammonium compositions of claim 1 in an amount sufficient to achieve the desired increase in retention.
Claim 6
Dependent Claim
47 words
A method of inhibiting the growth and proliferation of microorganisms selected from the group consisting of algae, bacteria, and fungi which comprises contacting said microorganisms with a polymeric quaternary ammonium composition of claim 1 in an amount sufficient to inhibit the growth and proliferation of said microorganisms.
Claim 7
Dependent Claim
63 words
A method for treating cellulose pulp to reduce inter-fiber bonding, thus imparting a low degree of mechanical strength to webs formed therefrom, which comprises adding to the cellulose pulp fiber slurry prior to or during the formation of the slurry into a web, a polymeric quaternary ammonium composition of claim 1 in an amount sufficient to achieve the desired decrease in inter-fiber bonding.
References Cited (Backward Citations)
US2454547A
Cited
US3663461A
Cited
US3974220A
Cited
US4012446A
Cited
US4027020A
Cited
US4036959A
Cited
US4038318A
Cited
US4197865A
Cited
US4091113A
Cited
US4150115A
Cited
US4325940A
Cited
US4374244A
Cited
US4271053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-18 | 1992-04-18 | 1992-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-18 | 1996-04-18 | 1996-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-18 | 2000-04-18 | 2000-10-18 | $7700.00 | Window Closed / Lapsed |