US4017558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic molding compositions of high impact resistance
Assignee: BASF SE
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Filing: 1975-02-13
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Granted: 1977-04-12
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Expires: 1995-02-13
Abstract
Abstract Impact-resistant thermoplastic molding compositions containing from 70 to 98 percent by weight of a polyoxymethylene and from 30 to 2 percent by weight of a block copolymer of the general formula A -- B -- A, wherein A is a polyalkylene oxide block and B is a diene polymer block.
Inventors
- 👤 Franz Schmidt
- 👤 Gerhard Fahrbach
- 👤 Wolfgang Schenk
- 👤 Erhard Seiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:02
CPC Classifications
C; C08; C08L; C08L59/00; C08L59/02; C08L53/00; C08L71/00; C08L71/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
112 words
Impact-resistant thermoplastic molding compositions comprising a blend of from 70 to 98 percent by weight of a polyoxymethylene and from 30 to 2 percent by weight of a block copolymer of the formula A--B--A, wherein A is a polyethylene oxide block and B is a diene polymer block, said diene polymer block being a homopolymer of butadiene, a copolymer of butadiene and isoprene, a copolymer of butadiene and styrene showing random distribution of the monomers, or a copolymer of butadiene and styrene showing a block structure, said diene polymer B containing at least 30 percent by weight of diene hydrocarbon, said block B having a molecular weight of from 20,000 to 1,000,000.
Claim 2
Dependent Claim
112 words
Impact-resistant thermoplastic molding compositions comprising a blend of from 70 to 98 percent by weight of a polyoxymethylene and from 30 to 2 percent by weight of a block copolymer of the formula A--B--A, wherein A is a polyethylene oxide block and B is a diene polymer block, said diene polymer block being a homopolymer of butadiene, a copolymer of butadiene and isoprene, a copolymer of butadiene and styrene showing random distribution of the monomers, or a copolymer of butadiene and styrene showing a block structure, said diene polymer B containing at least 30 percent by weight of diene hydrocarbon, said block B having a molecular weight of from 20,000 to 1,000,000.
Claim 3
Dependent Claim
34 words
A composition as set forth in claim 1 wherein said block B has a molecular weight of from 50,000 to 500,000 and said blocks A have a molecular weight of from 10,000 to 300,000.
References Cited (Backward Citations)
US3732333A
Cited
US3398074A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |