US4607059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-releasing composition for tailoring gas evolution of system IR 2811
Assignee: Arkema Inc
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Filing: 1985-09-25
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Granted: 1986-08-19
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Expires: 2005-09-25
Abstract
Abstract A gas-releasing composition of a t-alkylhydrazinium salt and/or a carbonylhydrazine and at least one compound selected from free radical forming sources, metal oxides, and sulfur and/or sulfur donor compounds wherein when sulfur and/or a sulfur donor compound is used, the composition will also contain one or more members selected from sulfur accelerators, metal oxides, and amino-alcohols. This novel gas-releasing composition permits the selectively tailoring of the gas evolution of a system in order to meet a wide range of specific application areas polymer characteristics and conditions over a wide temperature range.
Inventors
- 👤 Chester J. Kmiec
- 👤 Michael F. Novits
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:10
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08J9/104
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
133 words
A method of foaming thermoplastic polymers or a thermoplastic polymer-elastomer blend selected from the group of styrene-maleic anhydride resin, polystyrene and high impact polystyrene resins, styrene-acrylonitrile resins, acrylonitrile-butadiene-styrene resins, polypropylene, low and high density polyethylene, polyphenylene oxide and modified polyphenylene oxide resins comprising adding to the polymeric resin the gas-generating composition consisting essentially of from a t-alkylhydrazinium salt and/or carbonylhydrazine and at least one compound selected from free radical forming sources, metal oxides, and sulfur and/or sulfur donor compounds wherein when sulfur and/or a sulfur donor compound is used, the composition will also contain one or more members selected from sulfur accelerators, metal oxides, and amino-alcohols as the foaming agent and heating until the foaming is completed under processing conditions such that the thermoplastic and/or elastomer properties of the original polymer are maintained.
Claim 2
Independent Claim
133 words
A method of foaming thermoplastic polymers or a thermoplastic polymer-elastomer blend selected from the group of styrene-maleic anhydride resin, polystyrene and high impact polystyrene resins, styrene-acrylonitrile resins, acrylonitrile-butadiene-styrene resins, polypropylene, low and high density polyethylene, polyphenylene oxide and modified polyphenylene oxide resins comprising adding to the polymeric resin the gas-generating composition consisting essentially of from a t-alkylhydrazinium salt and/or carbonylhydrazine and at least one compound selected from free radical forming sources, metal oxides, and sulfur and/or sulfur donor compounds wherein when sulfur and/or a sulfur donor compound is used, the composition will also contain one or more members selected from sulfur accelerators, metal oxides, and amino-alcohols as the foaming agent and heating until the foaming is completed under processing conditions such that the thermoplastic and/or elastomer properties of the original polymer are maintained.
Claim 3
Dependent Claim
10 words
The method of claim 1 wherein the elastomer is EPDM.
Claim 4
Dependent Claim
28 words
The method of claim 1 wherein the elastomerthermoplastic blends are selected from the group of EPDM in combination with low density polyethylene and EPDM in combination with polypropylene.
Claim 5
Independent Claim
96 words
A method of foaming polyurethanes comprising adding to the polymeric resin the gas-generating composition consisting essentially of from a t-alkylhydrazinium salt and/or carbonylhydrazine and at least one compound selected from free radical forming sources, metal oxides, and sulfur and/or sulfur donor compounds wherein when sulfur and/or a sulfur donor compound is used, the composition will also containe one or more members selected from sulfur accelerators, metal oxides, and amino-alcohols as the foaming agent and heating until the foaming is completed under processing conditions such that the thermoplastic and/or elastomer properties of the original polymer are maintained.
Claim 6
Independent Claim
96 words
A method of foaming polyurethanes comprising adding to the polymeric resin the gas-generating composition consisting essentially of from a t-alkylhydrazinium salt and/or carbonylhydrazine and at least one compound selected from free radical forming sources, metal oxides, and sulfur and/or sulfur donor compounds wherein when sulfur and/or a sulfur donor compound is used, the composition will also containe one or more members selected from sulfur accelerators, metal oxides, and amino-alcohols as the foaming agent and heating until the foaming is completed under processing conditions such that the thermoplastic and/or elastomer properties of the original polymer are maintained.
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) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |