US3640840A
Expired / Lapsed
US
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Component reaction product and process for increasing the wet strength of paper
Assignee: Bayer AG
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Filing: 1969-03-18
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Granted: 1972-02-08
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Expires: 1989-03-18
Abstract
Abstract A reaction product and process for increasing the wet strength of paper which comprises adding to a slurry of paper fibers selfcross-linking water soluble reaction products prepared from a) epihalohydrins and/or Alpha -dihalo-hydrins such as epichlorohydrin, b) water soluble basic polyamides such as that formed by the reaction of diethylene-triamine and adipic acid, and c) water soluble polyamines such as bis-(3-amino-propyl)amine which contain at least two nitrogen atoms separated from one another by at least three carbon atoms and optionally also by oxygen or sulfur atoms, and contain at least two hydrogen atoms attached to different nitrogen atoms wherein the components b) and c) are used in a proportion of 1-10:1 and component a) is used in an amount of 0.5 to 1.5 mole per basic amino group.
Inventors
- 👤 Heinz Zieman
- 👤 Wolfgang Lehmann
- 👤 Gerhard Troemel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:29
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/48; D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54; D21H17/55; D21H17/56
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
28 words
Process according to claim 1 wherein the wet-strengthening agent is prepared by reacting, in a single stage, epichlorohydrin and a mixture of a basic polyamide and a polyamine.
Claim 2
Dependent Claim
191 words
Self-cross-linking water soluble reaction products of at least one each of members a), b), and c) said members being components selected from the groups consisting of a) epihalohydrins, Alpha -dihalohydrins, and both epihalohydrins and Alpha -dihalohydrins, b) water soluble basic polyamides, and c) water soluble polyamines which are selected from the group consisting of water soluble polyamines which contain at least two nitrogen atoms separated from one another by at least three carbon atoms and contain at least two hydrogen atoms attached to different nitrogen atoms, water soluble polyamines which contain at least two nitrogen atoms separated from one another by at least three carbon atoms and by oxygen atoms and contain at least two hydrogen atoms attached to different nitrogen atoms, and water soluble polyamines which contain at least two nitrogen atoms separated from one another by at least three carbon atoms and by sulphur atoms and contain at least two hydrogen atoms attached to different nitrogen atoms wherein the components b) and c) have been reacted in a proportion of 1-10:1 and component a) has been used in an amount of 0.5 to 1.5 mole per basic amino group.
Claim 3
Dependent Claim
58 words
Process according to claim 1 wherein the polyamines c) are selected from the group consisting of polyamines of the formula wherein R1 and R2 independently of one another are selected from the class consisting of hydrogen, C1-C4 alkyl, C1-C4 alkyl substituted by a hydroxy group; m is a number from 1-8 and n is a number from 1-10.
Claim 4
Dependent Claim
16 words
Process according to claim 1 wherein the polyamines c) are selected from polyamines of the formula
Claim 5
Dependent Claim
23 words
Process according to claim 1 wherein the water soluble polyamine c) is selected from the class consisting of bis-(3-amino-propyl)-amine; methyl-bis-(3-amino-propyl)-amine and hexamethylene diamine.
Claim 6
Dependent Claim
72 words
Process according to claim 1 wherein the water soluble basic polyamides b) are reaction products of 1) a member selected from the class consisting of saturated aliphatic C4-C10 dicarboxylic acids and 2) a member selected from the class consisting of aliphatic polyamines containing at least two primary amino groups and at least one secondary amino group and aliphatic polyamines containing at least two primary amino groups and at least one tertiary group.
Claim 7
Dependent Claim
20 words
Process according to claim 7 wherein the polyamines 2) and acids 1) are used in a molar proportion of 0.8-1.4:1.
Claim 8
Dependent Claim
22 words
Process of claim 7 wherein the acids 1) are selected from the class consisting of succinic acid, glutaric acid, and adipic acid.
Claim 9
Dependent Claim
66 words
Process according to claim 7 wherein the aliphatic polyamines 2) are selected from polyalkylene polyamines of the formula wherein A is selected from the class consisting of C2-C8 alkylene; R1 and R2 are independently of one another are selected from the class consisting of C1-C10 alkyl, C1-C10 alkyl containing an amino substituent, and C1-C10 alkyl containing a hydroxy substituent and n is a number from 2-5.
Claim 10
Dependent Claim
21 words
Process according to claim 7 wherein the polyamines 2) are selected from the class consisting of diethylenetriamine, triethylene-tetramine, and tetraethylene pentamine.
Claim 11
Dependent Claim
67 words
Products according to claim 3 wherein the polyamines c) are selected from the group consisting of polyamines of the formula wherein R1 and R2 independently of one another are selected from the class consisting of hydrogen, C1-C4 alkyl, C1-C4 alkyl substituted by an amino group and C1-C4 alkyl residue substituted by a hydroxy group; m is a number from 1-8 and n is a number from 1-10.
Claim 12
Dependent Claim
16 words
Products according to claim 3 wherein the polyamines c) are selected from polyamines of the formula
Claim 13
Dependent Claim
23 words
Products according to claim 3 wherein the water soluble polyamine c) is selected from the class consisting of bis--(3-amino-propyl)-amine; methyl-bis-(3-amino-propyl)-amine and hexamethylene diamine.
Claim 14
Dependent Claim
80 words
Products according to claim 3 wherein the water soluble basic polyamides b) are selected from the group consisting of the reaction produCt of 1) a member selected from the class consisting of saturated aliphatic C4-C10 dicarboxylic acids and 2) a member selected from the class consisting of aliphatic polyamines containing at least two primary amino groups and at least one secondary amino group and aliphatic polyamines containing at least two primary amino groups and at least one tertiary amino group.
Claim 15
Dependent Claim
20 words
Products according to claim 14 wherein the polyamines 2) and acids 1) are used in a molar proportion of 0.8-1.4:1.
Claim 16
Dependent Claim
22 words
Products of claim 14 wherein the acids 1) are selected from the class consisting of succinic acid, glutaric acid, and adipic acid.
Claim 17
Dependent Claim
65 words
Products according to claim 14 wherein the aliphatic polyamines 2) are selected from polyalkylene polyamines of the formula wherein A is selected from the class consisting of C2-C8 alkylene; R1 and R2 independently of one another are selected from the class consisting of C1-C10 alkyl, C1-C10 alkyl containing an amino substituent, and C1-C10 alkyl containing a hydroxy substituent and n is a number from 2-5.
Claim 18
Dependent Claim
21 words
Products according to claim 14 wherein the polyamines 2) are selected from the class consisting of diethylene-triamine, triethylene-tetramine, and tetraethylene pentamine.
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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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |