US4617341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane latex sizing agents for the paper industry and their method of manufacture
Assignee: Arkema France SA
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Filing: 1985-05-20
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Granted: 1986-10-14
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Expires: 2005-05-20
Abstract
Abstract A sizing agent for the paper industry comprising a cationic oligourethane latex; said urethane having the formula: ##STR1## in which R 2 is an alkylene radical containing a C 2 -C 6 radical or a polyoxyalkylenic radical of a degree of polycondensation of 1 to 4, R 3 is an alkyl radical containing at least 7 carbon atoms, and R 4 and X represent the remainder of the quaternizing agent R 4 X with (a) R 1 representing ##STR2## R 5 being an aliphatic radical containing C 4 as a maximum and n varying from 1 to 3; or (b) R 1 representing ##STR3## R 5 being ##STR4## in which R 2 , R 3 , R 4 and X having the preceding definitions and n varying from 2 to 6; and the method of making the oligourethane latex.
Inventors
- 👤 Antoine Laine
- 👤 Claude Senez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:41
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0809; C08G18/0814; C08G18/28; C08G18/30; C08G18/32; C08G18/3271; C08G18/3275; D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54; D21H17/57
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
126 words
A sizing agent comprising an oligourethane latex; said urethane having the formula: ##STR13## in which R 2 is an alkylene radical containing a C 2 -C 6 radical or a polyoxyalkylenic radical of a degree of polycondensation of 1 to 4, R 3 is an alkyl radical containing at least 7 carbon atoms, and R 4 and X represent the remainder of the quaternizing agent R 4 X with (a) R 1 representing ##STR14## R 5 being an aliphatic radical containing C 4 as a maximum and n varying from 1 to 3; or (b) R 1 representing ##STR15## R 5 being ##STR16## in which R 2 , R 3 , R 4 and X having the preceding definitions and n varying from 2 to 6.
Claim 2
Dependent Claim
126 words
A sizing agent comprising an oligourethane latex; said urethane having the formula: ##STR13## in which R 2 is an alkylene radical containing a C 2 -C 6 radical or a polyoxyalkylenic radical of a degree of polycondensation of 1 to 4, R 3 is an alkyl radical containing at least 7 carbon atoms, and R 4 and X represent the remainder of the quaternizing agent R 4 X with (a) R 1 representing ##STR14## R 5 being an aliphatic radical containing C 4 as a maximum and n varying from 1 to 3; or (b) R 1 representing ##STR15## R 5 being ##STR16## in which R 2 , R 3 , R 4 and X having the preceding definitions and n varying from 2 to 6.
Claim 3
Dependent Claim
24 words
The sizing agent of claim 1, wherein the degree of quaternization with respect to the quaternizable nitrogen atoms is between about 10 and 60%.
Claim 4
Dependent Claim
20 words
The sizing agent of claim 1 or 2, wherein the moledular weight of the oligourethane is between 500 and 3000.
Claim 5
Dependent Claim
73 words
The method of making the sizing agent of claim 1 comprising reacting a polyisocyanate and a quaternized N-alkyldialkanolamine containing two hydroxy groups each linked to the nitrogen atom by an aliphatic chain of 1 to 6 carbon atoms, or a polyoxyalkylenic chain of a degree of polycondensation of 1 to 4, with the N-substituent containing at least 7 carbon atoms and then dispersing the resultant oligourethane obtained in water to form a latex.
Claim 6
Dependent Claim
26 words
The method of claim 4, wherein the reaction of the polyisocyanate with the dialkanolamine takes place in a solvent medium and said polyisocyanate is toluene diisocyanate.
Claim 7
Dependent Claim
11 words
The method of claim 5, wherein said solvent is methylene chloride.
Claim 8
Dependent Claim
24 words
The method of claim 6, wherein the reaction between the toluene diisocyanate and the dialkanolamine takes place in the presence of a chain terminator.
Claim 9
Dependent Claim
11 words
The method of claim 7, wherein the chain terminator is ethanol.
Claim 10
Dependent Claim
24 words
The method of claim 4, 5, 6, 7, or 8, wherein the NCO/OH ratio of the reaction medium is no greater than about 1.
Claim 11
Dependent Claim
23 words
The method of claim 4, 5, 6, 7, or 8, wherein the oligourethane is dispersed in water in the presence of a solvent.
Claim 12
Dependent Claim
22 words
The method of claim 4, 5, 6, 7, or 8, wherein the oligourethane is dispersed in water in the presence of acetone.
References Cited (Backward Citations)
US3971764A
Cited
GB1487913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-13 | 1990-04-14 | 1990-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-13 | 1994-04-14 | 1994-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-13 | 1998-04-14 | 1998-10-14 | $7700.00 | Window Closed / Lapsed |