US3240664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyaminoureylene- epichlorohydrin resins and use in forming wet strength paper
Assignee: Hercules Powder Co
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Filing: 1964-02-03
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Granted: 1966-03-15
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Expires: 1984-02-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Ralph H Earle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:44
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54; D21H17/57; C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2618; C08G71/00; C08G71/02; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
144 words
A PROCESS OF PREPARING A CATIONIC THERMOSETTING RESIN WHICH COMPRISES REACTING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF UREA AND THIOUREA WITH A POLYAMINE CONTAINING AT LEAST THREE AMINE GROUPS, AT LEAST ONE OF WHICH IS A TERTIARY AMINE GROUP IN A MOLE RATIO OF THE LATTER TO THE FORMER FROM ABOUT 0.7:1 TOK ABOUT 1.5:1 TO FORM A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A POLYAMINOURELYENE AND A POLYAMINOTHIOUREYLENE CONTAINING FREE AMINE GROUPS, AT LEAST 70% OF WHICH ARE TERTIARY AMINE GROUPS, AND THEN REACTING, UNDER ALKALINE REACTION CONDITIONS, THE MATERIAL SELECTED FROM THE GROUP CONSISTING OF A POLYAMINOURELYLENE AND A POLYAMINOTHIOUREYLENE WITH EPICHLOROHYDRIN IN A MOLE RATIO OF EPICHLOROHYDRIN TO FREE AMINE GROUPS IN THE MATERIAL SELECTED FROM THE GROUP CONSISTING OF A POLYAMINOUREYLENE AND A POLYAMINOTHIOUREYLENE OF FROM ABOUT 1.0:1 TO ABOUT 1.7:1 TO FORM A CATIONIC THERMOSETTING RESIN.
Claim 2
Dependent Claim
144 words
A PROCESS OF PREPARING A CATIONIC THERMOSETTING RESIN WHICH COMPRISES REACTING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF UREA AND THIOUREA WITH A POLYAMINE CONTAINING AT LEAST THREE AMINE GROUPS, AT LEAST ONE OF WHICH IS A TERTIARY AMINE GROUP IN A MOLE RATIO OF THE LATTER TO THE FORMER FROM ABOUT 0.7:1 TOK ABOUT 1.5:1 TO FORM A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A POLYAMINOURELYENE AND A POLYAMINOTHIOUREYLENE CONTAINING FREE AMINE GROUPS, AT LEAST 70% OF WHICH ARE TERTIARY AMINE GROUPS, AND THEN REACTING, UNDER ALKALINE REACTION CONDITIONS, THE MATERIAL SELECTED FROM THE GROUP CONSISTING OF A POLYAMINOURELYLENE AND A POLYAMINOTHIOUREYLENE WITH EPICHLOROHYDRIN IN A MOLE RATIO OF EPICHLOROHYDRIN TO FREE AMINE GROUPS IN THE MATERIAL SELECTED FROM THE GROUP CONSISTING OF A POLYAMINOUREYLENE AND A POLYAMINOTHIOUREYLENE OF FROM ABOUT 1.0:1 TO ABOUT 1.7:1 TO FORM A CATIONIC THERMOSETTING RESIN.
Claim 3
Dependent Claim
156 words
A PROCESS OF PREPARING WET-STRENGTH PAPER WHICH COMPRISES INCORPORATIG THERIN FROM ABOUT 0.1% TO ABOUT 5.0% BY WEIGHT, BASED ON THE WEIGHT OF PAPER, OF A CATONIC THERMOSETTING RESIN, SAID RESIN COMPRISING A WATER-SOLUBLE REACTION PRODUCT OF EPICHLOROHYDRIN AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A POLYAMINOUREYLENE AND A POLYAMINOTHIOUREYLENE CONTAINING FREE AMINE GROUPS, AT LEAST 70% OF WHICH ARE TERTIARY AMINE GROUPS, THE MOLE RATIO OF EPICHLOROHYDRIN TO FREE AMINE GROUPS BEING FROM ABOUT 1.0:1 TO ABOUT 1.7:1, SAID MATERIAL SELECTED FROM THE GROUP CONSISTING OF A POLYAMINOUREYLENE AND A POLYAMINOTHIOUREYLENE BEING OBTAINED BY REACTING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF UREA AND THIOUREA WITH A POLYAMINE CONTAINING AT LEAST THREE AMINE GROUPS, AT LEAST ONE OF WHICH IS A TERTIARY AMINE GROUP, IN A MOLE RATIO OF THE LATTER TO THE FORMER OF FROM ABOUT 0.7:1 TO ABOUT 1.5:1, THE SAID WATER-SOLUBLE REACTION PRODUCT BEING DERIVED UNDER ALKALINE REACTION CONDITIONS.
Claim 4
Dependent Claim
156 words
A PROCESS OF PREPARING WET-STRENGTH PAPER WHICH COMPRISES INCORPORATIG THERIN FROM ABOUT 0.1% TO ABOUT 5.0% BY WEIGHT, BASED ON THE WEIGHT OF PAPER, OF A CATONIC THERMOSETTING RESIN, SAID RESIN COMPRISING A WATER-SOLUBLE REACTION PRODUCT OF EPICHLOROHYDRIN AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A POLYAMINOUREYLENE AND A POLYAMINOTHIOUREYLENE CONTAINING FREE AMINE GROUPS, AT LEAST 70% OF WHICH ARE TERTIARY AMINE GROUPS, THE MOLE RATIO OF EPICHLOROHYDRIN TO FREE AMINE GROUPS BEING FROM ABOUT 1.0:1 TO ABOUT 1.7:1, SAID MATERIAL SELECTED FROM THE GROUP CONSISTING OF A POLYAMINOUREYLENE AND A POLYAMINOTHIOUREYLENE BEING OBTAINED BY REACTING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF UREA AND THIOUREA WITH A POLYAMINE CONTAINING AT LEAST THREE AMINE GROUPS, AT LEAST ONE OF WHICH IS A TERTIARY AMINE GROUP, IN A MOLE RATIO OF THE LATTER TO THE FORMER OF FROM ABOUT 0.7:1 TO ABOUT 1.5:1, THE SAID WATER-SOLUBLE REACTION PRODUCT BEING DERIVED UNDER ALKALINE REACTION CONDITIONS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |