US3608031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of expanded olefin polymer moldings
Assignee: RUDOLF GAETH HANS GEORG TRIESC
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Filing: 1967-05-19
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Granted: 1971-09-21
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Expires: 1987-05-19
Abstract
Abstract Production of moldings of expanded olefin polymers by mixing expanded particles of ethylene or propylene polymers with at least 0.3 gram/liter of said expanded particles of curable binders which contain less than 5 percent solvent based on the amount of binder, compressing the mixture by 5 percent to 70 percent of the bulk volume and curing the compressed mixture under pressure.
Inventors
- 👤 Fritz Stastny
- 👤 Rudolf Gaeth
- 👤 Hans-Georg Trieschmann
- 👤 Johann Zizlsperger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:05
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/22; C08J9/228; C08J9/236; B; B29; B29C; B29C44/00; B29C44/02; B29C44/10; B29C67/00; B29C67/20; B29C67/207; C22; C22C; C22C14/00; B29K; B29K2023/00; C08J2323/00; C08J2323/02; Y; Y10; Y10S; Y10S264/00; Y10S264/07; Y10S264/16
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
102 words
A process for the production of flexible moldings of expanded olefin polymers which comprises mixing expanded particles of a polymer of ethylene or propylene having an X-ray crystallinity which is more than 25% at 25* C., the particles having a diameter of 3 to 50 mm. and a bulk density of 5 to 200 grams/liter, with 0.3 to 4 grams per liter of said expanded particles of a curable binder which contains less than 5% solvent based on the amount of binder, compressing the mixture to decrease its original bulk volume by 5% to 70% and curing said compressed mixture under pressure.
Claim 2
Dependent Claim
21 words
A process as claimed in claim 1 wherein the mixture is compressed by 40% to 60% of its original bulk volume.
Claim 3
Dependent Claim
124 words
A process for the production of flexible moldings of expanded olefin polymers which comprises mixing expanded particles of a copolymer of ethylene containing 5% to 30% by weight of polymerized units of esters of acrylic acid or methacrylic acid or vinylcarboxylic acid, the particles having a diameter of 3 to 50 mm. and a bulk density of 5 to 200 grams/liter, with 0.3 to 4 grams per liter of said expanded particles of a curable binder which contains less than 5% solvent based on the amount of binder, said binder being based on a polyester resin, and an epoxy resin or a polyurethane-forming mixture, compressing the mixture to decrease its original bulk volume by 5% to 70% and curing said compressed mixture under pressure.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |