US4758628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic elastomeric blends of polyethylene and polychloroprene gel
Assignee: Advanced Polymer Compounding LP
•
Filing: 1987-06-03
•
Granted: 1988-07-19
•
Expires: 2007-06-03
Abstract
Abstract A composition comprising a blend of about 70-20 weight percent crystalline polyethylene resin and 30-80 weight percent emulsion-derived polychloroprene gel is disclosed. The blend is prepared by blending the two materials at a temperature near to or above the melting point of the polyethylene.
Inventors
- 👤 James R. Wolfe, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:29
CPC Classifications
C; C08; C08L; C08L11/00; C08L23/00; C08L23/02; C08L23/04; C08L23/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
101 words
A non-irradiated composition comprising a binary polymer blend of about 70-20 parts by weight per 100 parts of polymer present of a crystalline polyethylene resin having a melt index of 0.07-80g/10 minutes as measured at 190° C. present as a continuous phase and 30-80 parts by weight per 100 parts of polymer present of a polychloroprene gel rubber containing at least 50% by weight polymerized chloroprene, said polychloroprene gel rubber being derived from an emulsion of polychloroprene gel rubber gelled to an extent that not more than about 45% by weight of said polychloroprene is extractable with benzene at 25° C.
Claim 2
Dependent Claim
101 words
A non-irradiated composition comprising a binary polymer blend of about 70-20 parts by weight per 100 parts of polymer present of a crystalline polyethylene resin having a melt index of 0.07-80g/10 minutes as measured at 190° C. present as a continuous phase and 30-80 parts by weight per 100 parts of polymer present of a polychloroprene gel rubber containing at least 50% by weight polymerized chloroprene, said polychloroprene gel rubber being derived from an emulsion of polychloroprene gel rubber gelled to an extent that not more than about 45% by weight of said polychloroprene is extractable with benzene at 25° C.
Claim 3
Dependent Claim
25 words
The compositions of claim 1 wherein the polyethylene resin contains up to 15 weight percent of polymerized higher alpha-olefins containing up to 12 carbon atoms.
Claim 4
Dependent Claim
21 words
The composition of claim 1 wherein the polychloroprene gel rubber is prepared by copolymerizing the chloroprene monomer with chain-branching, polyfunctional monomers.
Claim 5
Dependent Claim
36 words
The composition of claim 1 comprising 60-30 parts by weight per 100 parts of polymer present of a crystalline polyethylene resin and 40-70 parts by weight per 100 parts polymer present of a polychloroprene gel rubber.
Claim 6
Dependent Claim
60 words
A process for preparing the composition of claim 1 in which polychloroprene gel rubber derived from an emulsion of polychloroprene gel rubber is mixed with polyethylene resin at a temperature near to or above the melting point of the polyethylene at a high shear rate so as to disperse the polychloroprene gel rubber in a continuous phase of polyethylene resin.
Claim 7
Dependent Claim
25 words
The process of claim 5 wherein the polyethylene resin contains up to 15 weight percent of polymerized higher alpha-olefins containing up to 12 carbon atoms.
Claim 8
Dependent Claim
21 words
The process of claim 5 wherein the polychloroprene gel rubber is prepared by copolymerizing the chloroprene monomer with chain-branching, polyfunctional monomers.
Claim 9
Dependent Claim
37 words
The process of claim 5 wherein 40-70 parts by weight per 100 parts of polymer present of a polychloroprene gel rubber are mixed with 60-30 parts by weight per 100 parts of polymer present of polyethylene resin.
References Cited (Backward Citations)
US28688A
Cited
USRE28688E
Cited
US3933754A
Cited
US4005054A
Cited
US4348266A
Cited
US4607074A
Cited
US4593062A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-19 | 1992-01-18 | 1992-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-19 | 1996-01-18 | 1996-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-19 | 2000-01-18 | 2000-07-19 | $7700.00 | Window Closed / Lapsed |