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US4425186A
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US
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Dimethylamide and cationic surfactant debonding compositions and the use thereof in the production of fluff pulp
Assignee: Buckman Laboratories International Inc
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Filing: 1981-03-24
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Granted: 1984-01-10
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Expires: 2001-03-24
Abstract
Abstract A mixture comprising a cationic surfactant and a dimethylamide of a straight chain carbon carboxylic acid containing 12 to 18 carbon atoms is useful in the treatment of cellulose pulp to reduce inter-fiber bonding, thus obtaining a low mechanical strength pulp sheet and having little or no adverse effects upon the hydrophilic properties of said fibers.
Inventors
- 👤 Oscar W. May
- 👤 Philip M. Hoekstra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:46
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/001; D21C9/002; D21C9/005; A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/48
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
121 words
A process for treating cellulose pulp fiber to reduce inter-fiber bonding, thus imparting a low degree of mechanical strength to webs formed therefrom, while at the same time, preserving good hydrophilic properties of said fiber which comprises adding to the cellulose pulp fiber slurry prior to or during the formation of the slurry into a web, a mixture comprising 10 to 90 weight percent of a cationic surfactant and 90 to 10 weight percent of a dimethylamide of a straight chain carboxylic acid characterized in that said carboxylic acid contains from 12 to 18 carbon atoms in an amount varying from 0.1 to 2.0 parts per 100 parts of said cellulose pulp fiber based on the dry weight of said fiber.
Claim 2
Dependent Claim
121 words
A process for treating cellulose pulp fiber to reduce inter-fiber bonding, thus imparting a low degree of mechanical strength to webs formed therefrom, while at the same time, preserving good hydrophilic properties of said fiber which comprises adding to the cellulose pulp fiber slurry prior to or during the formation of the slurry into a web, a mixture comprising 10 to 90 weight percent of a cationic surfactant and 90 to 10 weight percent of a dimethylamide of a straight chain carboxylic acid characterized in that said carboxylic acid contains from 12 to 18 carbon atoms in an amount varying from 0.1 to 2.0 parts per 100 parts of said cellulose pulp fiber based on the dry weight of said fiber.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein the straight chain carboxylic acid is lauric acid.
Claim 4
Dependent Claim
14 words
The method of claim 1 wherein the straight chain carboxylic acid is myristic acid.
Claim 5
Dependent Claim
14 words
The method of claim 1 wherein the straight chain carboxylic acid is palmitic acid.
Claim 6
Dependent Claim
14 words
The method of claim 1 wherein the straight chain carboxylic acid is linoleic acid.
Claim 7
Dependent Claim
14 words
The method 1f claim 1 wherein the straight chain carboxylic acid is linolenic acid.
Claim 8
Dependent Claim
14 words
The method of claim 1 wherein the straight chain carboxylic acid is oleic acid.
Claim 9
Dependent Claim
14 words
The method of claim 1 wherein the straight chain carboxylic acid is ricinoleic acid.
Claim 10
Dependent Claim
14 words
The method of claim 1 wherein the straight chain carboxylic acid is stearic acid.
Claim 11
Dependent Claim
32 words
The method of claim 1 wherein the straight chain carboxylic acid is a mixture of straight chain carboxylic acids containing 18 carbon atoms and at least one carbon to carbon double bond.
Claim 12
Dependent Claim
20 words
The method of claim 1 wherein the straight chain carboxylic acid is a mixture of acids derived from tall oil.
Claim 13
Dependent Claim
20 words
The method of claim 1 wherein the straight chain carboxylic acid is a mixture of acids derived from soybean oil.
Claim 14
Dependent Claim
23 words
The method of claim 1 wherein the straight chain carboxylic acid is the byproduct acid from the dimerization of tall oil fatty acids.
Claim 15
Dependent Claim
18 words
The method of claim 1 wherein the cationic surfactant is an alkyl (C 12 -C 18 )dimethylbenzylammonium chloride.
Claim 16
Dependent Claim
18 words
The method of claim 1 wherein the cationic surfactant is an alkyl (C 12 -C 18 )trimethylammonium chloride.
Claim 17
Dependent Claim
18 words
The method of claim 1 wherein the cationic surfactant is a dialkyl (C 12 -C 18 )dimethylammonium chloride.
Claim 18
Dependent Claim
18 words
The method of claim 1 wherein the cationic surfactant is a dialkyl (C 12 -C 18 )methylbenzylammonium chloride.
Claim 19
Dependent Claim
14 words
The method of claim 1 wherein the cationic surfactant is a primary alkylamine salt.
Claim 20
Dependent Claim
14 words
The method of claim 1 wherein the cationic surfactant is a secondary alkylamine salt.
Claim 21
Dependent Claim
27 words
The method of claim 1 wherein the straight chain carboxylic acid is a mixture of acids derived from tall oil and the cationic surfactant is hexadecyldimethylbenzylammonium chloride.
Claim 22
Dependent Claim
27 words
The method of claim 1 wherein the straight chain carboxylic acid is a mixture of acids derived from tall oil and the cationic surfactant is hexadecyltrimethylammonium chloride.
Claim 23
Dependent Claim
27 words
The method of claim 1 wherein the straight chain carboxylic acid is a mixture of acids derived from soybean oil and the cationic surfactant is hexadecyltrimethylammonium chloride.
Claim 24
Dependent Claim
27 words
The method of claim 1 wherein the straight chain carboxylic acid is a mixture of acids derived from soybean oil and the cationic surfactant is hexadecyldimethylbenzylammonium chloride.
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) | 1987-01-09 | 1987-07-11 | 1988-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-09 | 1991-07-11 | 1992-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-09 | 1995-07-11 | 1996-01-10 | $7700.00 | Window Closed / Lapsed |