US3694522A
Expired / Lapsed
US
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Process for producing a aromatic vinyl polymer compositons
Assignee: Mitsui Toatsu Chemicals Inc
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Filing: 1970-09-29
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Granted: 1972-09-26
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Expires: 1990-09-29
Abstract
Abstract Aromatic vinyl polymer compositions are produced by dissolving 1 to 20 parts by weight of an ethylene-propylene-nonconjugated diene terpolymer rubber and from 5 to 50 percent by weight based on said terpolymer rubber of a polymer having the general formula: WHEREIN X is hydrogen, C2H4OH or COOH and n is an average polymerization degree of 10 to 100 in 100 parts by weight of an aromatic vinyl monomer, prepolymerizing the solution by bulkpolymerization and then completing the polymerization by bulkpolymerization or suspension polymerization.
Inventors
- 👤 Masami Tsuruta
- 👤 Shinji Ito
- 👤 Ichiro Otsuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:28
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/02; C08F255/06; C08F291/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
47 words
The process according to claim 1 wherein the aromatic vinyl monomer is selected from the group consisting of styrene, Alpha -methylstyrene, a halo-styrene and mixtures thereof and mixtures of at least 50 percent by weight of said aromatic vinyl monomer with an aliphatic vinyl monomer copolymerizable therewith.
Claim 2
Dependent Claim
30 words
The process according to claim 2 wherein the aliphatic vinyl monomer is selected from the group consisting of nitriles, lower alkyl esters of acrylic and methacrylic acids and mixtures thereof.
Claim 3
Dependent Claim
29 words
The process according to claim 1 wherein the terpolymer rubber contains at least 0.2 mol of nonconjugated diene copolymerized with a total of 100 mols of ethylene and propylene.
Claim 4
Dependent Claim
15 words
The process according to claim 4 containing from 0.5 to 5 mols of nonconjugated diene.
Claim 5
Dependent Claim
20 words
The process according to claim 1 wherein the prepolymerization is conducted at a temperature of from 50* to 150* C.
Claim 6
Dependent Claim
35 words
The process according to claim 6 wherein the prepolymerization is conducted in presence of a polymerization catalyst in the amount of from 0.05 to 1.0 part by weight per 100 parts of aromatic vinyl monomer.
Claim 7
Dependent Claim
26 words
The process according to claim 1 wherein the prepolymerized solution is further polymerized at a temperature of from 80* to 180* C until polymerization is complete.
Claim 8
Dependent Claim
14 words
The process according to claim 8 wherein said further polymerization is a suspension polymerization.
Claim 9
Dependent Claim
32 words
The process according to claim 8 wherein said further polymerization is conducted in presence of from 0.03 to 0.30 part by weight of polymerization catalyst per 100 parts of said prepolymerized solution.
References Cited (Backward Citations)
US3188364A
Cited
US3538190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |