US3860552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymer compositions and method of preparation
Assignee: Pitney Bowes Inc
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Filing: 1973-09-12
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Granted: 1975-01-14
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Expires: 1993-09-12
Abstract
Abstract Disclosed herein are novel copolymer compositions and method of preparing same that are useful for coating applications and as toners in the electrostatic printing industry. These copolymer compositions of the present invention are prepared by copolymerization of, on the one hand a low molecular weight unsaturated ester which is called a first monomer and on the other hand one or more copolymerizable long chain, C6 to C20 aliphatic ethylenically unsaturated monomers which is called a second monomer in a non-aqueous solvent, for example, isoparaffinic hydrocarbons.
Inventors
- 👤 Jean Pierre Montillier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:41
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/13; G03G9/131
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
29 words
A composition of claim 1 wherein said low molecular weight unsaturated ester is vinyl acetate and said long chain C6 to C20 aliphatic ethylenically unsaturated monomer is lauryl methacrylate.
Claim 2
Dependent Claim
29 words
A composition of claim 1 wherein said low molecular weight unsaturated ester is vinyl acetate and said long chain C6 to C20 aliphatic ethylenically unsaturated monomer is stearyl methacrylate.
Claim 3
Independent Claim
157 words
A method of preparing a stable non-aqueous copolymer dispersion composition which is prepared without the presence of a dispersing agent for maintaining the polymeric material as discrete particles, comprising: admixing a low molecular weight unsaturated ester selected from the group consisting of vinyl acetate, methyl acrylate, ethyl acrylate, methyl methacrylate and ethyl methacrylate and a long chain C6 to C20 aliphatic ethylenically unsaturated monomer selected from the group consisting of long chain acrylic, methacrylic and vinyl esters in a petroleum fraction organic liquid carrier selected from the group consisting of paraffinic hydrocarbon and isoparaffinic hydrocarbon in the ration of said low molecular weight monomer to said long chain monomer of about 95 to 5 to about 50 to 50 weight percent in the presence of a polymerizing agent, mixing and maintaining said admixture at a temperature of at least 60*C, and less than 130* C until substantial completion of copolymerization, and then allowing said admixture to cool.
Claim 4
Dependent Claim
30 words
The method of claim 4 in which said low molecular weight unsaturated ester is vinyl acetate and said long chain C6 to C20 aliphatic ethylenically unsaturated monomer is lauryl methacrylate.
Claim 5
Dependent Claim
30 words
The method of claim 4 in which said low molecular weight unsaturated ester is vinyl acetate and said long chain C6 to C20 aliphatic ethylenically unsaturated monomer is stearyl methacrylate.
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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |