← Back to Patent Explorer
US3664977A Expired / Lapsed US ⏱️ 0.0 years remaining

Bulk polymerized aromatic hydrocarbon in rubber and polyphenylene ether

Assignee: Asahi Kasei Corp
•
Filing: 1969-11-17
•
Granted: 1972-05-23
•
Expires: 1989-11-17
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A resin improved in impact resistance is obtained by continuously subjecting to bulk-polymerization a mixture composed mainly of a vinyl aromatic compound and containing a rubbery substance; incorporating a mixture comprising an aromatic hydrocarbon and a polyphenylene ether into the system during a period from the stage immediately after the phase inversion of the rubbery substance to the stage where the total polymer concentration has become 40 percent, and further continuing the bulk-polymerization with thorough stirring until the polymerization is substantially completed. The thus obtained resin has improved physical properties and gives a molded article excellent in appearance.

Inventors

  • 👤 Atsuo Nakanishi
  • 👤 Shinichi Izawa
  • 👤 Mikio Sato

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 16:15
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02; C08F283/00; C08F283/06; C08F283/08

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 26 words
A process according to claim 1, wherein the vinyl aromatic compound is selected from the group consisting of styrene, vinyltoluene, vinylxylene, ethylvinylbenzene, isopropenylbenzene, isopropylstyrene and ethylvinyltoluene.
Claim 2
Dependent Claim 12 words
A process according to claim 1, wherein the polyphenylene ether is poly(2,6-dimethylphenylene-1,4-ether).
Claim 3
Dependent Claim 14 words
A process according to claim 1, wherein the aromatic hydrocarbon is styrene or ethylbenzene.
Claim 4
Dependent Claim 30 words
A process according to claim 1, wherein the solution of the polyphenylene ether is incorporated into the system at the stage where the total polymer concentration has become 15-35 percent.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-05-23 1975-11-22 1976-05-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-05-23 1979-11-22 1980-05-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-05-23 1983-11-22 1984-05-23 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag