US3899459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of polychloroprene
Assignee: Distugil SA
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Filing: 1973-06-08
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Granted: 1975-08-12
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Expires: 1993-06-08
Abstract
Abstract Polychloroprene is prepared by polymerization in the presence of a binary system of saturated and/or unsaturated fatty acids and/or an alkali-metal salt thereof and modified rosin acid derivatives.
Inventors
- 👤 Paul Branlard
- 👤 Jacques Modiano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:25
CPC Classifications
C; C09; C09J; C09J111/00; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C08F36/14; C08F36/16; C08F36/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
91 words
PROCESS FOR THE MANUFACTURE OF POLYCHLOROPRENE RUBBER IN AN AQUEOUS EMULSION, COMPRISING POLYMERIZING CHLOROPRENE IN THE PRESENCE OF A BINARY SYSTEM THE COMPOSITION OF WHICH, BY WEIGHT WITH REGARD TO CHLOROPRENE, IS FROM 1 TO 2.5% OF SATURATED AND/OR UNSATURATED FATTY ACIDS AND/OR ALKALI-METAL SALTS THEREOF, AND FROM 3 TO 6% OF ROSIN ACID DERIVATIVES SUFFICIENTLY MODIFIED SO THAT IT DOES NOT PRODUCE A PHASE SEPARATION WHICH RESULTS FROM THE FORMATION OF A COMPLEX BETWEEN THE MAGNESIA, THE PHENOLIC RESIN AND THE ROSIN DERIVATIVE WHEN PRESENT TOGETHER IN A POLYCHLOROPRENE ADHESIVE.
Claim 2
Dependent Claim
91 words
PROCESS FOR THE MANUFACTURE OF POLYCHLOROPRENE RUBBER IN AN AQUEOUS EMULSION, COMPRISING POLYMERIZING CHLOROPRENE IN THE PRESENCE OF A BINARY SYSTEM THE COMPOSITION OF WHICH, BY WEIGHT WITH REGARD TO CHLOROPRENE, IS FROM 1 TO 2.5% OF SATURATED AND/OR UNSATURATED FATTY ACIDS AND/OR ALKALI-METAL SALTS THEREOF, AND FROM 3 TO 6% OF ROSIN ACID DERIVATIVES SUFFICIENTLY MODIFIED SO THAT IT DOES NOT PRODUCE A PHASE SEPARATION WHICH RESULTS FROM THE FORMATION OF A COMPLEX BETWEEN THE MAGNESIA, THE PHENOLIC RESIN AND THE ROSIN DERIVATIVE WHEN PRESENT TOGETHER IN A POLYCHLOROPRENE ADHESIVE.
Claim 3
Dependent Claim
34 words
Process according to claim 1 wherein the modified rosin acid derivatives are selected from the group consisting of dimerised rosin acids, partially polymerized rosin acids, partially esterified dimerised rosin acids and oxidized wood rosins.
Claim 4
Dependent Claim
29 words
Process according to claim 2 wherein said rosin derivatives are selected from the group consisting of unmodified wood rosin, disproportionated wood rosin, hydrogenated wood rosin and their alkaline soaps.
Claim 5
Dependent Claim
15 words
As a new industrial product, the polychloroprene rubber obtained by the process of claim 1.
Claim 6
Dependent Claim
15 words
Adhesive mixtures presenting no phase separation phenomenon made from the polychloroprene rubber oF claim 4.
Claim 7
Dependent Claim
70 words
A process in accordance with claim 1 wherein the system in which polymerization of chloroprene takes place is a ternary system and further includes up to 0.5% of a rosin derivative which is not modified so that it does not produce a phase separation which results from the formation of a complex between the magnesia, the phenolic resin and the rosin derivative when present together in in a polychloroprene adhesive.
Claim 8
Dependent Claim
35 words
A process in accordance with claim 1 wherein said saturated and/or unsaturated fatty acids and/or alkali-metal salts thereof consist of C10 to C14 saturated and/or C12 to C20 unsaturated fatty acids and/or alkali-metal salts thereof.
Claim 9
Dependent Claim
35 words
A process in accordance with claim 6 wherein said saturated and/or unsaturated fatty acids and/or alkali-metal salts thereof consist of C10 to C14 saturated and/or C12 to C20 unsaturated fatty acids and/or alkali-metal salts thereof.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |