US4148768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer dispersion process
Assignee: Millennium Petrochemicals Inc
•
Filing: 1977-08-15
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Granted: 1979-04-10
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Expires: 1997-08-15
Abstract
Abstract A process for forming dispersions of olefin polymers and copolymers using an alkali metal soap of fatty acids as the dispersing agent.
Inventors
- 👤 Dorothee M. McClain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:05
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J2323/00; C08J2323/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
99 words
In the process of preparing in pulverulent form a normally solid thermoplastic resin selected from the group consisting of polyolefin or olefin copolymer containing up to about 15 weight percent of polar monomer by vigorously agitating said resin in molten form in water in the presence of a dispersing agent at a temperature below the degradation temperature of said resin to produce a dispersion of said resin and cooling said dispersion to below about 100° C. the improvement wherein the dispersing agent is a lithium salt of a higher saturated fatty acid containing from 18 to 26 carbon atoms.
Claim 2
Dependent Claim
99 words
In the process of preparing in pulverulent form a normally solid thermoplastic resin selected from the group consisting of polyolefin or olefin copolymer containing up to about 15 weight percent of polar monomer by vigorously agitating said resin in molten form in water in the presence of a dispersing agent at a temperature below the degradation temperature of said resin to produce a dispersion of said resin and cooling said dispersion to below about 100° C. the improvement wherein the dispersing agent is a lithium salt of a higher saturated fatty acid containing from 18 to 26 carbon atoms.
Claim 3
Dependent Claim
10 words
Process according to claim 1 wherein the polyolefin is polyethylene.
Claim 4
Dependent Claim
79 words
A process for preparing in pulverulent form a normally solid thermoplastic resin selected from the group consisting of polyolefin or olefin copolymer containing up to about 15 weight percent of polar monomer which comprises vigorously agitating said resin in molten form in water in the presence of a dispersing agent comprising lithium behenate at a temperature below the degradation temperature of said resin to produce a dispersion of said resin and cooling said dispersion to below about 100° C.
Claim 5
Dependent Claim
79 words
A process for preparing in pulverulent form a normally solid thermoplastic resin selected from the group consisting of polyolefin or olefin copolymer containing up to about 15 weight percent of polar monomer which comprises vigorously agitating said resin in molten form in water in the presence of a dispersing agent comprising lithium behenate at a temperature below the degradation temperature of said resin to produce a dispersion of said resin and cooling said dispersion to below about 100° C.
Claim 6
Dependent Claim
10 words
Process according to claim 3 wherein the resin is polyethylene.
Claim 7
Dependent Claim
23 words
Process according to claim 3 wherein the resin is an ethylene-vinyl acetate copolymer containing up to about 15 weight percent of vinyl acetate.
Claim 8
Dependent Claim
25 words
Process according to claim 3 wherein the dispersing agent is employed at a level of at least about 5 parts per 100 parts of resin.
Claim 9
Dependent Claim
27 words
Process according to claim 3 wherein the dispersing agent is employed at a level of from about 5 to about 15 parts per 100 parts of resin.
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 |