US5091435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross-linkable, foamable polyolefin resin composition
Assignee: Tonen Chemical Corp
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Filing: 1991-07-05
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Granted: 1992-02-25
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Expires: 2011-07-05
Abstract
Abstract The cross-linkable, foamable polyolefin resin composition capable of forming foams with excellent mechanical properties and heat resistance is made of (a) 30-80 weight % of a propylene-ethylene random copolymer having an ethylene content of 1.5-6 weight %; (b) 10-60 weight % of a propylene-ethylene random copolymer having an ethylene content of 0.2-1.0 weight %; (c) 10-60 weight % of a linear low-density polyethylene; and (d) 1-30 parts by weight, per 100 parts by weight of the above resin components, of a foaming agent.
Inventors
- 👤 Toshiaki Suzuki
- 👤 Sotoyuki Kitagawa
- 👤 Takashi Nakayama
- 👤 Takao Kuno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:09
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; C08J; C08J9/00; C08J9/0061; C08L23/10; C08L23/14; C08L23/142; C08J2323/00; C08J2323/02; C08J2323/16; C08J2423/00; C08L2203/00; C08L2203/14; C08L2205/00; C08L2205/02; C08L2205/03; C08L2312/00; Y; Y10; Y10S; Y10S264/00; Y10S264/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
83 words
A cross-linkable, foamable polyolefin resin composition comprising: (a) 30-80 weight % of a propylene-ethylene random copolymer having an ethylene content of 1.5-6 weight %; (b) 10-60 weight % of a propylene-ethylene random copolymer having an ethylene content of 0.2-1.0 weight %; (c) 10-60 weight % of a linear low-density polyethylene; and (d) 1-30 parts by weight, per 100 parts by weight of the total amount of said propylene-ethylene random copolymer (a)+said propylene-ethylene random copolymer (b)+said linear low-density polyethylene (c), of a foaming agent.
Claim 2
Dependent Claim
83 words
A cross-linkable, foamable polyolefin resin composition comprising: (a) 30-80 weight % of a propylene-ethylene random copolymer having an ethylene content of 1.5-6 weight %; (b) 10-60 weight % of a propylene-ethylene random copolymer having an ethylene content of 0.2-1.0 weight %; (c) 10-60 weight % of a linear low-density polyethylene; and (d) 1-30 parts by weight, per 100 parts by weight of the total amount of said propylene-ethylene random copolymer (a)+said propylene-ethylene random copolymer (b)+said linear low-density polyethylene (c), of a foaming agent.
Claim 3
Dependent Claim
43 words
The cross-linkable, foamable polyolefin resin composition according to claim 1, wherein the ethylene content in a mixture of said propylene-ethylene random copolymer (a) and said propylene-ethylene random copolymer (b) is 0.5-4.0 weight % per 100 weight % of said propylene-ethylene random copolymer mixture.
Claim 4
Dependent Claim
65 words
The cross-linkable, foamable polyolefin resin composition according to claim 1, wherein said composition provides a foam having a specific strength of 200×10 3 cm or more and a tensile elongation of 350% or more at 23° C. and a specific strength of 30×10 3 cm or more and a tensile elongation of 350% or more at 130° C. in both of MD and TD directions.
Claim 5
Dependent Claim
65 words
The cross-linkable, foamable polyolefin resin composition according to claim 2, wherein said composition provides a foam having a specific strength of 200×10 3 cm or more and a tensile elongation of 350% or more at 23° C. and a specific strength of 30×10 3 cm or more and a tensile elongation of 350% or more at 130° C. in both of MD and TD directions.
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) | 1995-02-24 | 1995-08-26 | 1996-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-24 | 1999-08-26 | 2000-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-24 | 2003-08-26 | 2004-02-25 | $7700.00 | Window Closed / Lapsed |