US4839412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene copolymer compositions
Assignee: EIDP Inc
•
Filing: 1987-09-01
•
Granted: 1989-06-13
•
Expires: 2007-09-01
Abstract
Abstract Certain ethylene copolymers that contain an ethylene/anhydride graft copolymer and a magnesium hydroxide or aluminum trihydrate flame and smoke retardant have a good balance of strength and flame and smoke retardant properties. The compositions preferably also contain polyethylene, and/or ionomeric ethylene copolymer and/or an ethylene/propylene elastomer.
Inventors
- 👤 Jerald R. Harrell
- 👤 Lawrence C. Muschiatti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:26
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/16; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08L23/04; C08L23/06; C08L23/08; C08L23/0807; C08L23/0815; C08L23/0846; C08L23/0853; C08L23/0869; C08L2205/00; C08L2205/03; C08L2205/035; C08L23/0876; C08L51/00; C08L51/06; C08L79/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
131 words
A thermoplastic ethylene polymer composition comprising: (a) 20-100 parts of an ethylene polymer matrix comprising at least one thermoplastic ethylene copolymer of ethylene and at least one comonomer selected from vinyl acetate, esters and of methacrylic acid or esters of acrylic acid; (b) 10-80 parts of at least one copolymer selected from the class consisting of (i) an ethylene/proylene/diene copolymer grafted with 0.1 to 5 weight % anhydride functionality, (ii) at least one polyolefin grafted with 0.1 to 5 weight % anhydride functionality, or (iii) a mixture of both; (c) 75-130 parts per 100 parts of polymeric components present of magnesium hydroxide or aluminum trihydrate, or a mixture of both; and (d) 0-80 parts of polyethylene; provided that the combined parts of components (a) and (d) is at least 80 parts.
Claim 2
Dependent Claim
131 words
A thermoplastic ethylene polymer composition comprising: (a) 20-100 parts of an ethylene polymer matrix comprising at least one thermoplastic ethylene copolymer of ethylene and at least one comonomer selected from vinyl acetate, esters and of methacrylic acid or esters of acrylic acid; (b) 10-80 parts of at least one copolymer selected from the class consisting of (i) an ethylene/proylene/diene copolymer grafted with 0.1 to 5 weight % anhydride functionality, (ii) at least one polyolefin grafted with 0.1 to 5 weight % anhydride functionality, or (iii) a mixture of both; (c) 75-130 parts per 100 parts of polymeric components present of magnesium hydroxide or aluminum trihydrate, or a mixture of both; and (d) 0-80 parts of polyethylene; provided that the combined parts of components (a) and (d) is at least 80 parts.
Claim 3
Dependent Claim
18 words
A composition according to claim 1 wherein the polyethylene is medium density polyethylene and/or linear low density polyethylene.
Claim 4
Dependent Claim
37 words
A composition according to claim 1 or 2 which also contains 3-20 parts of at least one ionomeric copolymer of ethylene and at least one alpha,beta-ethylenically unsaturated carboxylic acid of 3-6 carbons partially neutralized with metal cations.
Claim 5
Dependent Claim
23 words
A composition according to claim 1 or 2 which also contains up to 50 parts of an ethylene/propylene copolymer, or an ethylene/propylene/diene copolymer.
Claim 6
Dependent Claim
20 words
The composition according to claim 1 or 2 wherein the copolymer defined in part (a) is an ethylene/vinyl acetate copolymer.
Claim 7
Dependent Claim
59 words
A composition according to claim 1 which additionally contains 10-40 parts of a copolymer selected from the class consisting of a copolymer of ethylene and either acrylic acid or methacrylic acid, a copolymer of ethylene/vinyl acetate grafted with anhydride functionality, and a copolymer of ethylene and acrylic or methacrylic acid esters of saturated aliphatic alcohols grafted with anhydride functionality.
References Cited (Backward Citations)
JPS5513718A
Cited
JPS582358A
Cited
JPS58184237A
Cited
EP0131358A1
Cited
EP0207734A2
Cited
US4687810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |