US4229504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefin composition having high impact resistance and high temperature flow resistance
Assignee: Bethlehem Steel Corp
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Filing: 1978-07-31
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Granted: 1980-10-21
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Expires: 1998-07-31
Abstract
Abstract A polyolefin composition having a high level of impact resistance and high temperature flow resistance comprising 30 to 90 weight percent resin containing greater than 50 to less than 75 weight percent of polyolefin and greater than 25 to less than 50 weight percent elastomer, and 10 to 70 weight percent filler.
Inventors
- 👤 Armand E. Brachman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:21
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/082; B32B15/085; B32B15/18; B32B27/00; B32B27/18; B32B27/20; C; C08; C08K; C08K3/00; C08K3/01; C08K3/013; C08K3/18; C08K3/24; C08K3/26; C08K3/30; C08K3/34; C08L; C08L23/00; C08L23/02; C08L23/16; B32B2307/00; B32B2307/30; B32B2307/306; B32B2311/00; B32B2311/30; B32B2323/00; B32B2323/04; B32B2323/043; B32B2323/046; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31696
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
144 words
As a new composition of matter, a resin blend of polyolefin and an elastomer to which a filler is added characterized by having rigidity, a high level of impace resistance and high temperature flow resistance, consisting essentially of: p1 (a) about 30 to 90 weight percent of a resin containing (i) greater than 50 to less than 75 weight percent of at least one polyolefin selected from the group consisting of isotactic crystalline polypropylene, high density crystalline polyethylene, low density polyethylene and propylene-ethylene copolymers in which propylene is present in 85-95% by weight and which has a tensile yield elongation no greater than 20%, and (ii) greater than 25 to less than 50 weight percent of elastomer and (b) about 10 to 70 weight percent of an inorganic filler selected from the group consisting of calcium carbonate, talc, clay, silica, quartz, mica, and barytes.
Claim 2
Dependent Claim
144 words
As a new composition of matter, a resin blend of polyolefin and an elastomer to which a filler is added characterized by having rigidity, a high level of impace resistance and high temperature flow resistance, consisting essentially of: p1 (a) about 30 to 90 weight percent of a resin containing (i) greater than 50 to less than 75 weight percent of at least one polyolefin selected from the group consisting of isotactic crystalline polypropylene, high density crystalline polyethylene, low density polyethylene and propylene-ethylene copolymers in which propylene is present in 85-95% by weight and which has a tensile yield elongation no greater than 20%, and (ii) greater than 25 to less than 50 weight percent of elastomer and (b) about 10 to 70 weight percent of an inorganic filler selected from the group consisting of calcium carbonate, talc, clay, silica, quartz, mica, and barytes.
Claim 3
Dependent Claim
27 words
The composition of matter of claim 1 wherein the resin is about 35 to 75 weight percent and the filler is about 25 to 65 weight percent.
Claim 4
Dependent Claim
27 words
The composition of matter of claim 1 wherein the resin is about 40 to 60 weight percent and the filler is about 40 to 60 weight percent.
Claim 5
Dependent Claim
18 words
The composition of matter of claims 1, 2 or 3 in which the polyolefin is isotactic crystalline polypropylene.
Claim 6
Dependent Claim
19 words
The composition of matter of claims 1, 2 or 3 in which the polyolefin is crystalline high density polyethylene.
Claim 7
Dependent Claim
18 words
The composition of matter of claims 1, 2 or 3 in which the polyolefin is low density polyethylene.
Claim 8
Dependent Claim
37 words
The composition of matter of claims 1, 2 or 3 in which the polyolefin is propylene-ethylene copolymer in which propylene is present in 85-95% by weight and which has a tensile yield elongation no greter than 20%.
Claim 9
Dependent Claim
33 words
The composition of matter of claims 1, 2 or 3 wherein the resin contains about 55 to 70 weight percent of the polyolefin and about 30 to 45 weight percent of the elastomer.
Claim 10
Dependent Claim
15 words
The composition of matter of claim 8 in which the polyolefin is isotactic crystalline polypropylene.
Claim 11
Dependent Claim
16 words
The composition of matter of claim 8 in which the polyolefin is crystalline high density polyethylene.
Claim 12
Dependent Claim
15 words
The composition of matter of claim 8 in which the polyolefin is low density polyethylene.
Claim 13
Dependent Claim
34 words
The composition of matter of claim 8 in which the polyolefin is propylene-ethylene copolymer in which propylene is present in 85-95% by weight and which has a tensile yield elongation no greater than 20%.
Claim 14
Dependent Claim
42 words
A method for making a metal-plastic laminate with a core material having a high level of impact resistance and high temperature flow resistance comprising sandwiching between two pieces of metal sheet a plastic sheet of the composition of matter of claim 1.
Claim 15
Dependent Claim
15 words
A metal-plastic laminate containing a core material of the composition of matter of claim 1.
Claim 16
Dependent Claim
13 words
The invention of claim 13 or 14 in which the metal is steel.
Claim 17
Dependent Claim
12 words
The invention of claim 15 wherein the polyolefin is isotactic crystalline polypropylene.
Claim 18
Dependent Claim
14 words
The invention of claim 15 in which the polyolefin is crystalline high density polyethylene.
Claim 19
Dependent Claim
13 words
The invention of claim 15 in which the polyolefin is low density polyethylene.
Claim 20
Dependent Claim
31 words
The invention of claim 15 in which the polyolefin is propylene-ethylene copolymer in which propylene is present in 85-95% by weight and has a tensile yield elongation no greater than 20%.
Claim 21
Dependent Claim
12 words
The invention of claim 16 wherein the elastomer is a propylene-ethylene-diene terpolymer.
Claim 22
Dependent Claim
24 words
The invention of claim 20 wherein the resin portion comprises 70 percent by weight isotactic crystalline polypropylene and 30 percent by weight propylene-ethylene-diene terpolymer.
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) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |