US4334030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic foamable blends
Assignee: General Electric Co
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Filing: 1979-11-23
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Granted: 1982-06-08
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Expires: 1999-11-23
Abstract
Abstract Foamable blends are provided of high performance thermoplastic polymers such as polyphenylene oxides, polystyrenes, etc., and an effective amount of a first blowing agent which is an amide derivative of azodicarboxylic acid and a second blowing agent which is a dihydrooxadiazinone.
Inventors
- 👤 John E. Kochanowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:44
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08J9/108
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
115 words
A substantially uniform injection moldable foamable blend comprising: (i) a thermoplastic organic polymer; (ii) a dihydrooxadiazinone represented by the formula ##STR6## wherein n is an integer equal to 1 or 2; R is a monovalent radical when n is 1, and a divalent radical when n is 2, selected from a C.sub.(1-8) alkyl radical or alkylene radical, a C.sub.(6-30) aryl radical or arylene radical and halogenated derivatives thereof; R 1 and R 2 are independently selected from hydrogen, C.sub.(1-8) alkyl, alkylene, C.sub.(6-30) aryl, alkoxy and aryloxy radicals; and, (iii) amide derivatives of azodicarboxylic acid represented by the general formula ##STR7## wherein R 3 and R 4 are independently selected from hydrogen and C.sub.(1-10) alkyl radicals.
Claim 2
Dependent Claim
115 words
A substantially uniform injection moldable foamable blend comprising: (i) a thermoplastic organic polymer; (ii) a dihydrooxadiazinone represented by the formula ##STR6## wherein n is an integer equal to 1 or 2; R is a monovalent radical when n is 1, and a divalent radical when n is 2, selected from a C.sub.(1-8) alkyl radical or alkylene radical, a C.sub.(6-30) aryl radical or arylene radical and halogenated derivatives thereof; R 1 and R 2 are independently selected from hydrogen, C.sub.(1-8) alkyl, alkylene, C.sub.(6-30) aryl, alkoxy and aryloxy radicals; and, (iii) amide derivatives of azodicarboxylic acid represented by the general formula ##STR7## wherein R 3 and R 4 are independently selected from hydrogen and C.sub.(1-10) alkyl radicals.
Claim 3
Dependent Claim
15 words
A blend according to claim 1 wherein R 3 and R 4 are hydrogen radicals.
Claim 4
Dependent Claim
11 words
A blend according to claim 2 wherein said dihydrooxadiazinone is 5-phenyl-3,6-dihydro-1,3,4-oxadiazin-2-one.
Claim 5
Dependent Claim
26 words
A blend according to claim 1 wherein the combined weight of (ii) and (iii) ranges from about 0.1 to about 10 weight percent of said blend.
Claim 6
Dependent Claim
21 words
A blend according to claim 4 wherein the weight ratio of (ii) to (iii) ranges from about 80:20 to about 20:80.
Claim 7
Dependent Claim
15 words
A blend according to claim 1 wherein said thermoplastic organic resin is a polyphenylene ether.
Claim 8
Dependent Claim
16 words
A blend according to claim 6 wherein said polyphenylene ether is a polystyrene modified polyphenylene ether.
Claim 9
Dependent Claim
13 words
A blend according to claim 7 wherein said polystyrene is high impact polystyrene.
Claim 10
Dependent Claim
19 words
A blend according to claim 3 wherein said thermoplastic organic resin is a high impact polystyrene modified polyphenylene ether.
Claim 11
Dependent Claim
23 words
A blend according to claim 9 wherein said high impact polystyrene modified polyphenylene ether contains flame retardant amount of a flame retardant compound.
Claim 12
Dependent Claim
14 words
A blend according to claim 10 wherein said flame retardant compound is triphenyl phosphate.
Claim 13
Dependent Claim
22 words
A blend according to claim 9 wherein said blend contains from about 0.1 to about 10 weight percent of 5-phenyl-3,6-dihydro-1,3,4-oxadiazin-2-one and azodicarbonamide.
Claim 14
Dependent Claim
23 words
A blend according to claim 12 wherein the weight ratio of said 5-phenyl-3,6-dihydro-1,3,4-oxadiazin-2-one to said azodicarbonamide ranges from about 80:20 to about 20:80.
Claim 15
Dependent Claim
13 words
A blend according to claim 1 in the form of a dry powder.
Claim 16
Dependent Claim
11 words
A blend according to claim 1 in the form of pellets.
Claim 17
Dependent Claim
23 words
An injection moldable concentrate in accordance with claim 1 containing from about 1 to about 30 weight percent of the (ii) and (iii).
Claim 18
Dependent Claim
24 words
An injection moldable concentrate in accordance with claim 16 wherein the weight ratio of (ii) to (iii) ranges from about 9:1 to about 1:9.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-07 | 1985-12-07 | 1986-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-07 | 1989-12-07 | 1990-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-07 | 1993-12-07 | 1994-06-08 | $7700.00 | Window Closed / Lapsed |