US4581383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightly crosslinked linear olefinic polymer foam blends and process for making
Assignee: Dow Chemical Co
•
Filing: 1985-09-06
•
Granted: 1986-04-08
•
Expires: 2005-09-06
Abstract
Abstract An expandable blend of a linear olefinic polymer and a crosslinkable polymer for production of lightly crosslinked foamed polymers and a process for the preparation thereof is provided. The presence of a crosslinkable polymer component in the blend increases the melt strength of the linear olefinic component so that conventional melt processing techniques may be utilized to produce foamed polymers. Both open and closed cell foams may be produced.
Inventors
- 👤 Chung P. Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:58
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08J9/149; C08J9/0061; C08J9/143; C08J9/147; C08K; C08K3/00; C08K3/34; C08K5/00; C08K5/02; C08K5/16; C08K5/17; C08K5/54; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/08; C08L23/0846; C08L23/0869; C08J2323/00; C08J2323/02; C08L2203/00; C08L2203/14; C08L2207/00; C08L2207/06; C08L2207/066; C08L2312/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
54 words
An expandable polymeric composition comprising a blend of a linear olefin polymer and a crosslinkable polymer having one or more carboxylic acid, amide, amine, or hydroxyl functional groups; a crosslinking agent selected from the group consisting of epoxy-functional silanes, amino-functional silanes, organofunctional alkoxy silanes, amines, multiepoxyfunctional resins, and titanates; and a volatile blowing agent.
Claim 2
Dependent Claim
54 words
An expandable polymeric composition comprising a blend of a linear olefin polymer and a crosslinkable polymer having one or more carboxylic acid, amide, amine, or hydroxyl functional groups; a crosslinking agent selected from the group consisting of epoxy-functional silanes, amino-functional silanes, organofunctional alkoxy silanes, amines, multiepoxyfunctional resins, and titanates; and a volatile blowing agent.
Claim 3
Dependent Claim
44 words
The composition of claim 1 in which said linear olefin polymer is low density polyethylene and is present in an amount of from 5 to 95% by weight and said crosslinkable polymer is present in an amount of from 95 to 5% by weight.
Claim 4
Dependent Claim
15 words
The composition of claim 1 in which said crosslinkable polymer is an ethylene-acrylic acid copolymer.
Claim 5
Dependent Claim
14 words
The composition of claim 3 in which said crosslinking agent is an epoxyfunctional silane.
Claim 6
Dependent Claim
14 words
The composition of claim 3 in which said crosslinking agent is a multiepoxyfunctional resin.
References Cited (Backward Citations)
GB1408154A
Cited
US4160072A
Cited
US4102829A
Cited
US4333898A
Cited
US4252906A
Cited
US4413066A
Cited
US4215202A
Cited
US4226946A
Cited
US4331779A
Cited
US4456704A
Cited
US4454086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-07 | 1989-10-07 | 1990-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-07 | 1993-10-07 | 1994-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-07 | 1997-10-07 | 1998-04-08 | $7700.00 | Window Closed / Lapsed |