US3637555A
Expired / Lapsed
US
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Additive systems for abs graft copolymers
Assignee: Dart Industries Inc
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Filing: 1968-09-30
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Granted: 1972-01-25
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Expires: 1988-09-30
Abstract
Abstract ABS RESINS HAVE IMPROVED STABILITY AGAINST DEGRADATION DUE TO HEAT AND OXYGEN BY ADDITION OF A BALANCED STABILIZER COMPOSITION WHICH MAINTAINS INITIAL COLOR AND IMPACT STRENGTH, MINIMIZES MELT FLOW CHANGES, AND REDUCES TENDENCY FOR CARBONYL FORMATION IN THE ABS RESIN DURING LONG TERM HEAT AGING (LTHA). THIS COMPOSITION COMPRISES FOR EXAMPLE, 0.05 TO 1.0 PERCENT OF EACH OF THE FOLLOWING CONSTITUENTS; (1) DLTDP, (2) 2,6-DI-T-BUTYL-4-METHYLPHENOL, (3) 2,2''-METHYLENEBIS (4-ETHYL-6-T-BUTYLPHENOL), AND (4) AN EPOXY COMPOUND DERIVED FROM SOYBEAN OIL OR BY THE CONDENSATION OF AN ETHYLENE OXIDE WITH A HYDROXYCONTAINING COMPOUND.
Inventors
- 👤 Paul J Marinacci
- 👤 Joseph M Kelley
- 👤 Frederick E Carrock
- 👤 Edward E Allemand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:39
CPC Classifications
C; C08; C08K; C08K5/00; C08L; C08L55/00; C08L55/02
Claims Analysis
Total Claims: 0
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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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |