US4148766A
Expired / Lapsed
US
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Polymer dispersion process
Assignee: Millennium Petrochemicals Inc
•
Filing: 1977-08-15
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Granted: 1979-04-10
•
Expires: 1997-08-15
Abstract
Abstract A process for forming dispersions of olefin polymers and copolymers using an alkali metal soap of higher carboxylic acids together with a water-soluble salt as the dispersing agent.
Inventors
- 👤 Dorothee M. McClain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:18
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/12; C08J3/16; C08J2323/00; C08J2323/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
61 words
A process for dispersing an olevin polymer containing from 0 up to about 15% polar comonomer which comprises agitating said polymer in molten state in an aqueous dispersion system comprising an alkali metal soap together with a water-soluble substantially neutral salt inert to said soap and cooling said system with the polymer in the disperse state to below about 100° C.
Claim 2
Dependent Claim
61 words
A process for dispersing an olevin polymer containing from 0 up to about 15% polar comonomer which comprises agitating said polymer in molten state in an aqueous dispersion system comprising an alkali metal soap together with a water-soluble substantially neutral salt inert to said soap and cooling said system with the polymer in the disperse state to below about 100° C.
Claim 3
Dependent Claim
12 words
Process according to claim 1 wherein said soap is formed in situ.
Claim 4
Dependent Claim
28 words
Process according to claim 1 wherein said dispersion system comprises an alkali metal soap of a saturated fatty acid containing from about 8 to about 22 carbon atoms.
Claim 5
Dependent Claim
13 words
Process according to claim 1 wherein said salt comprises an alkali metal salt.
Claim 6
Dependent Claim
13 words
Process according to claim 1 wherein said soap comprises an alkali metal stearate.
Claim 7
Dependent Claim
13 words
Process according to claim 5 wherein said salt comprises an alkali metal salt.
Claim 8
Dependent Claim
12 words
Process according to claim 1 wherein the polymer comprises an ethylene polymer.
Claim 9
Dependent Claim
13 words
Process according to claim 1 wherein the polymer comprises an ethylene-vinyl acetate copolymer.
Claim 10
Dependent Claim
56 words
Process according to claim 1 wherein the weight ratio of polymer to water in said dispersion system is from about 0.1:1 to about 3:1; the weight ratio of soap to polymer is from about 0.01:1 to about 0.3:1; and the salt is present at from about 0.1 to about 15% based on the weight of water.
Claim 11
Dependent Claim
21 words
A process according to claim 1 wherein said dispersion system comprises an alkali metal soap of a dimerized polyunsaturated fatty acid.
Claim 12
Dependent Claim
12 words
A process according to claim 1 wherein said soap comprises sodium stearate.
References Cited (Backward Citations)
US2653919A
Cited
US3586654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |