US3673146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for stabilizing pigmented polycarbonate resins
Assignee: General Electric Co
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Filing: 1971-02-24
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Granted: 1972-06-27
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Expires: 1991-02-24
Abstract
Abstract A method is provided for stabilizing polycarbonate resin tinted with ultramarine pigment, involving the incorporation of the ultramarine pigment into the polycarbonate resin as an arylsiloxane-pigment blend. There also is employed with the arylsiloxane-pigment blend, polycarbonate resin stabilizers such as triorganophosphite, and a cyclo aliphatic epoxy compound. The stabilized resin can be remolded without a significant increase in the Yellow Index of the resin.
Inventors
- 👤 Arnold Factor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:15
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/2053; C08K; C08K13/00; C08K13/06; C08K9/00; C08K9/04; C08K9/06; C08J2369/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
12 words
The method in accordance with claim 1, where arylsiloxane is a methylphenylpolysiloxane.
Claim 2
Dependent Claim
20 words
The method in accordance with claim 2, where the arylsiloxane consists essentially of chemically combined phenylsiloxy units and trimethylsiloxy units.
Claim 3
Dependent Claim
20 words
A method for stabilizing polycarbonate resin in accordance with claim 1, utilizing phenyldidecylphosphite, 3,4-epoxycyclohexymethyl-3,4-epoxy-cyclohexane carboxylate, ultramarine pigment and a methylphenylsiloxane.
References Cited (Backward Citations)
DE1124241B
Cited
US3087908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |