US4157982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersed rosin
Assignee: Akzo NV
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Filing: 1975-07-24
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Granted: 1979-06-12
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Expires: 1995-07-24
Abstract
Abstract A stable aqueous dispersion is prepared by emulsifying an immiscible mixture consisting essentially of molten rosin, alkali metal alkyl benzene sulfonate and water, said immiscible mixture having a temperature in the range of from about 165 DEG C. to about 190 DEG C., and cooling said emulsion. The product consists of a substantially stable aqueous dispersion consisting essentially of water, rosin material and alkali metal benzene sulfonate in an amount sufficient to stabilize the rosin material. Sized cellulosic substrates are prepared by mixing with an aqueous slurry of cellulosic papermaking fibers a sufficient amount of the aqueous dispersion described above to size the cellulosic paper fibers, forming the fibers into a web, and drying the web.
Inventors
- 👤 E. Dale Clemons
- 👤 John T. Daust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:09
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/62; C; C08; C08L; C08L93/00; C08L93/04; Y; Y10; Y10S; Y10S516/00; Y10S516/905; Y10S516/909
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
60 words
A process which comprises emulsifying an immiscible mixture consisting of molten rosin, alkali metal alkyl benzene sulfonate and water while maintaining the mixture at a temperature above the temperature of the molten rosin; and thereafter cooling the emulsion to a temperature below about 100° C. at a rate sufficiently rapid to prevent precipitation of the solid rosin from the emulsion.
Claim 2
Dependent Claim
60 words
A process which comprises emulsifying an immiscible mixture consisting of molten rosin, alkali metal alkyl benzene sulfonate and water while maintaining the mixture at a temperature above the temperature of the molten rosin; and thereafter cooling the emulsion to a temperature below about 100° C. at a rate sufficiently rapid to prevent precipitation of the solid rosin from the emulsion.
Claim 3
Dependent Claim
46 words
A process of claim 1 wherein water is present in an amount of from about 70% to about 55% by weight, and rosin material is present in an amount of from about 30 to about 45% by weight, based on the total weight of the dispersion.
Claim 4
Dependent Claim
28 words
A process of claim 1 wherein the alkyl group on the alkali metal alkyl benzene sulfonate has a chain length between about 8 and about 24 carbon atoms.
Claim 5
Dependent Claim
35 words
A process of claim 2 wherein the alkali metal alkyl benzene sulfonate is present in an amount from about 1% by weight to about 6% by weight, based on the weight of the rosin material.
Claim 6
Dependent Claim
40 words
A process of claim 2 wherein the alkali metal alkyl benzene sulfonate is the sodium salt and is present in an amount from about 1% by weight to about 3% by weight, based on the weight of the rosin material.
Claim 7
Dependent Claim
62 words
A process of claim 1 wherein the emulsion consists of (a) from about 99% by weight to about 40% by weight water, based on the total weight of the emulsion; (b) from about 1% by weight to about 60% by weight rosin material, based on the total weight of the emulsion; and (c) a stabilizing amount of alkali metal alkyl benzene sulfonate.
Claim 8
Dependent Claim
67 words
A process of claim 1 wherein the rosin material is a fortified and modified rosin, the alkali metal alkyl benzene sulfonate is sodium alkyl benzene sulfonate present in an amount from about 1% by weight to about 3% by weight, based on the weight of the fortified and modified rosin, and more than 70% of the total alkyl chain length being from 12 to 14 carbon atoms.
Claim 9
Dependent Claim
25 words
A process of claim 1 wherein the alkali metal alkyl benzene sulfonate has an average linear alkyl chain length of 12 to 14 carbon atoms.
Claim 10
Dependent Claim
35 words
A process of claim 6 wherein the alkali metal alkyl benzene sulfonate is present in an amount from about 1% by weight to about 6% by weight, based on the weight of the rosin material.
Claim 11
Dependent Claim
46 words
A process of claim 6 wherein water is present in an amount of from about 70% to about 55% by weight and rosin material is present in an amount of from about 30 to about 45% by weight, based on the total weight of the emulsion.
References Cited (Backward Citations)
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GB424230A
Cited
US2326610A
Cited
US2393179A
Cited
US2601597A
Cited
US2771464A
Cited
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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) | 1982-06-11 | 1982-12-11 | 1983-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-11 | 1986-12-11 | 1987-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-11 | 1990-12-11 | 1991-06-12 | $7700.00 | Window Closed / Lapsed |