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US4292222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homogeneous thermoplastic mixtures of propylene-ethylene copolymers and liquid, saturated diorganopolysiloxanes within a certain viscosity range
Assignee: Bayer AG
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Filing: 1980-02-08
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Granted: 1981-09-29
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Expires: 2000-02-08
Abstract
Abstract A homogeneous thermoplastic mixture comprising (A) from 85 to 99.5% by weight of a propylene-ethylene copolymer containing from 0.5 to 15% by weight of copolymerized ethylene units and having a melt index of from 1.0 to 30 g/min at 230° C. and under a load of 5 kg; and (B) from 0.5 to 15% by weight of a saturated diorganopolysiloxane having a viscosity of from 30,000 to 80,000 Cst at 20° C. The mixtures of the present invention are particularly suitable for the manufacture of elastic polypropylene based moulded articles which are dimensionally stable in heat.
Inventors
- 👤 Ulrich Grigo
- 👤 Leo Morbitzer
- 👤 Klaus-Peter Arlt
- 👤 Rudolf Binsack
- 👤 Josef Merten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:14
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/14; C08L23/142; C08L83/00; C08L83/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
72 words
A homogeneous thermoplastic mixture comprising (A) from 85 to 99.5% by weight of a propylene-ethylene copolymer containing from 0.5 to 15% by weight of copolymerised ethylene units and having a melt index of from 1.0 to 30 g/min at 230° C. and under a load of 5 kg; and (B) from 0.5 to 15% by weight of a saturated diorganopolysiloxane having a viscosity of from 30,000 to 80,000 Cst at 20° C.
Claim 2
Dependent Claim
72 words
A homogeneous thermoplastic mixture comprising (A) from 85 to 99.5% by weight of a propylene-ethylene copolymer containing from 0.5 to 15% by weight of copolymerised ethylene units and having a melt index of from 1.0 to 30 g/min at 230° C. and under a load of 5 kg; and (B) from 0.5 to 15% by weight of a saturated diorganopolysiloxane having a viscosity of from 30,000 to 80,000 Cst at 20° C.
Claim 3
Dependent Claim
39 words
A homogeneous thermoplastic mixture as claimed in claim 1 wherein component (A) is present in an amount of from 90 to 99% by weight and component (B) is present in an amount of from 1 to 10% by weight.
Claim 4
Dependent Claim
47 words
A homogeneous thermoplastic mixture as claimed in claim 1 wherein the propylene-ethylene copolymer contains amorphous rubber-like ethylene-propylene segments which under temperature dependent measurements of torsion moduli according to DIN 53 445 produce maxima of dynamic loss modulus G" in the range of from -30° to 60° C.
Claim 5
Dependent Claim
31 words
A homogeneous thermoplastic mixture as claimed in claim 1 wherein the diorganopolysiloxane is a dialkylpolysiloxane having from 1 to 4 carbon atoms in each alkyl group, a diphenylpolysiloxane or a methyl-phenylpolysiloxane.
Claim 6
Dependent Claim
14 words
A homogeneous thermoplastic mixture as claimed in claim 4 wherein the dialkylpolysiloxane is dimethylpolysiloxane.
Claim 7
Dependent Claim
25 words
A homogeneous thermoplastic mixture as claimed in claim 1 wherein the propylene-ethylene copolymer contains from 1 to 10% by weight of copolymerised units of ethylene.
Claim 8
Dependent Claim
14 words
Heat moulded articles prepared from a homogeneous thermoplastic mixture as claimed in claim 1.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |