US3687909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactive beta-lactone-containing polymers and a method for their preparation
Assignee: Dow Chemical Co
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Filing: 1970-02-09
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Granted: 1972-08-29
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Expires: 1990-02-09
Abstract
Abstract Polyalkylene copolymers containing interlinking beta-lactone groups are prepared by treating an olefin-alkylene carboxylic acid copolymer, containing at least one group of the formula WITH A TERTIARY AMINE TO INTERLINK AT LEAST TWO SEGMENTS OF SAID COPOLYMERS THROUGH A BETA-LACTONE GROUP OF THE FORMULA WHEREIN B and B'' are segments of the polyalkylene chain; R and R'' are H, alkyl, phenyl, COOH, or a segment of the polyalkylene chain; and X is a halogen. The copolymers containing these betalactone groups may react further to give rise to insoluble films and coatings, and, further, synergistically improve the performance of textile oil- and water-proofing agents.
Inventors
- 👤 Walter L Vaughn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:37
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/14; C08F8/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
16 words
The copolymer of claim 1 wherein the molecular weight is from about 2,000 to about 5,000.
Claim 2
Dependent Claim
77 words
The copolymers of claim 1 wherein B or B'' is a segment of a copolymer derived from one or more precursor polymers of the formula A(35-95 weight percent) B(0-40 weight percent) C(5-25 weight percent) D(0-30 weight percent), A, B, C and D suitably being in any order, wherein A is ethylene, B is propylene, C is acrylic acid, and D is at least one of methyl acrylate, ethyl acrylate, methyl methacrylate, ethyl methacrylate, isobutyl acrylate or acrylonitrile.
Claim 3
Dependent Claim
106 words
A process for preparing the polyalkylene copolymer of claim 1 which comprises contacting, at no more than about 60* C., a 0.005 to 20.0 weight percenT solution of an olefin-alkylene carboxylic acid copolymer containing at least one group of the formula wherein B is a segment of the polyalkylene chain, R is H, an alkyl group of up to about 20 carbon atoms, phenyl, COOH, or a segment of the polyalkylene chain, and X is a halogen, with an amount of a tertiary amine sufficient to convert at least one of the groups of formula (II) to the beta-lactone groups of formula I in claim 1.
Claim 4
Dependent Claim
21 words
The process of claim 4 wherein the polymer has a concentration in the solution of from 1 to 2 weight percent.
Claim 5
Dependent Claim
15 words
The process of claim 4 wherein the reaction temperature is from 20* to 30* C.
Claim 6
Dependent Claim
17 words
The process of claim 4 wherein 1 to 100 equivalents of amine are utilized per acid equivalent.
Claim 7
Dependent Claim
12 words
The process of claim 7 wherein 3 to 5 equivalents are utilized.
References Cited (Backward Citations)
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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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |