US3622653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grafts of vinyl or vinylidene monomers onto polymerized cyclopentene
Assignee: Bayer AG
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Filing: 1969-02-28
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Granted: 1971-11-23
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Expires: 1989-02-28
Abstract
Abstract Thermoplastic-elastic moulding compositions from 5 to 50 percent by weight of a polypentenamer as a grafting base and from 95 to 50 parts by weight of a vinyl or vinylidene compound and a process for producing these compositions by graft polymerizing the vinyl or vinylidene compound in the presence of the polypentenamer e.g. in emulsified form.
Inventors
- 👤 Herbert Schuster
- 👤 Karl Nutzel
- 👤 Karl Dinges
- 👤 Harry Rohr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:12
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
112 words
A process for producing a thermoplastic-elastic moulding composition which comprises dissolving A. 5 to 20 parts by weight of an elastomeric polypentenamer with a Mooney viscosity ML-4 of from 20 to 80 in B. 95 to 80 parts by weight of a. styrene, side-chain- or nuclear-substituted styrene, methyl methacrylate or mixtures thereof and b. acrylonitrile, methacrylonitrile, esters of acrylic-, methacrylic- and fumaric acid and mixtures thereof, the alcohol component in the esters containing from 1 to 4 carbon atoms, the ratio of (a) to (b) being from 100:5 to 50:50 and subjecting the resulting rubber/monomer solution to radical polymerization by the addition of a radical initiator which is soluble in the solution.
Claim 2
Dependent Claim
61 words
The process of claim 2, wherein said polymerization is carried out with shear-promoting agitation at 60* to 120* C. up to a conversion of 15 to 30 percent of the monomers and resulting prepolymer is converted into a suspension and polymerization is completed at a temperature of from 80* to 100* C. and up to conversions of more than 95 percent.
Claim 3
Dependent Claim
14 words
The moulding compositions of claim 1 wherein (a) is styrene and (b) is acrylonitrile.
Claim 4
Dependent Claim
15 words
The moulding compositions of claim 1 wherein each of (a) and (b) is methyl 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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |