US3255136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of polypropylene with mixtures comprising organic-phosphite phenol transesterification products and esters of thiodipropionic acid
Assignee: Argus Chemical Corp
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Filing: 1965-04-07
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Granted: 1966-06-07
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Expires: 1985-04-07
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Hecker
- 👤 Otto S Kauder
- 👤 Norman L Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:48
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/524; C08K5/04; C08K5/09; C08K5/098; C08K5/36; C08K5/37; C08K5/372; C08K5/526
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
A STABILIZER COMBINATION FOR USE IN IMPROVING RESISTANCE OF POLYPROPYLENE TO DETERIORATION IN PHYSICAL PROPERTIES ON EXPOSURE TO LIGHT AND HEAT, CONSISTING ESSENTIALLY OF: (A) A RRANSESTERFIED REACTION PRODUCT OF AN ORGANIC PHENOL IN AN AMOUNT OF FROM ABOUT 1 TO ABOUT 20 PARTS BY WEIGHT OF AN ORGANIC PHOSPHITE TRIESER FREE FROM PHENOLIC HYDROXYL GROUPS IN AN AMOUNT OF FROM ABOUT 0.1 TO ABOUT 50 PARTS BY WEIGHT, OBTAINED BY A TRANSESTERFICATION OF THE PHENOL AND PHOSPHITE AT AN ELEVATED TEMPERATURE SUFFICIENT TO FORM A HOMOGENEOUS MIXTURE, AND (B) AN ESTER OF THIODIPROPIONIC ACID IN AN AMOUNT OF FROM ABOUT 0.1 TO ABOUT 40 PARTS BY WEIGHT; AND (C) A SALT OF AN ORGANIC NON-NITROGENOUS MONOCARBOXYLIC ACID HAVING FROM ABOUT SIX TO ABOUT TWENTYFOUR CARBON ATOMS AND A METAL OF GROUP II OF THE PERIODIC TABLE IN AN AMOUNT OF FROM ABOUT 0.05 TO ABOUT 30 PARTS BY WEIGHT, SAID STABILIZER COMBINATION BEING COMPATIBLE WITH POLYPROPYLENE AND HAVING A LOW VAPOR PRESSURE AT POLYPROPYLENE WORKING TEMPERATURES.
Claim 2
Dependent Claim
167 words
A STABILIZER COMBINATION FOR USE IN IMPROVING RESISTANCE OF POLYPROPYLENE TO DETERIORATION IN PHYSICAL PROPERTIES ON EXPOSURE TO LIGHT AND HEAT, CONSISTING ESSENTIALLY OF: (A) A RRANSESTERFIED REACTION PRODUCT OF AN ORGANIC PHENOL IN AN AMOUNT OF FROM ABOUT 1 TO ABOUT 20 PARTS BY WEIGHT OF AN ORGANIC PHOSPHITE TRIESER FREE FROM PHENOLIC HYDROXYL GROUPS IN AN AMOUNT OF FROM ABOUT 0.1 TO ABOUT 50 PARTS BY WEIGHT, OBTAINED BY A TRANSESTERFICATION OF THE PHENOL AND PHOSPHITE AT AN ELEVATED TEMPERATURE SUFFICIENT TO FORM A HOMOGENEOUS MIXTURE, AND (B) AN ESTER OF THIODIPROPIONIC ACID IN AN AMOUNT OF FROM ABOUT 0.1 TO ABOUT 40 PARTS BY WEIGHT; AND (C) A SALT OF AN ORGANIC NON-NITROGENOUS MONOCARBOXYLIC ACID HAVING FROM ABOUT SIX TO ABOUT TWENTYFOUR CARBON ATOMS AND A METAL OF GROUP II OF THE PERIODIC TABLE IN AN AMOUNT OF FROM ABOUT 0.05 TO ABOUT 30 PARTS BY WEIGHT, SAID STABILIZER COMBINATION BEING COMPATIBLE WITH POLYPROPYLENE AND HAVING A LOW VAPOR PRESSURE AT POLYPROPYLENE WORKING TEMPERATURES.
References Cited (Backward Citations)
BE577252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |