US4141878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic compositions of CSM rubber and polyolefin resin
Assignee: Advanced Elastomer Systems LP
•
Filing: 1978-04-14
•
Granted: 1979-02-27
•
Expires: 1998-04-14
Abstract
Abstract {PG,1 Thermoplastic compositions are described comprising blends of cross-linked CSM (chlorosulfonated polyethylene) rubber and thermoplastic crystalline polyolefin resin.
Inventors
- 👤 Aubert Y. Coran
- 👤 Raman Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:54
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/10; C08L23/12; C08L23/26; C08L23/32; C08L23/34
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
69 words
A thermoplastic composition comprising a blend of about 15 to about 65 parts by weight thermoplastic crystalline polyolefin resin and about 85 to about 35 parts by weight cross-linked chlorosulfonated polyethylene rubber per 100 total parts by weight polyolefin resin and chlorosulfonated polyethylene rubber, in which the chlorosulfonated polyethylene rubber is cross-linked to the extent that no more than forty weight percent of the rubber is extractable in toluene.
Claim 2
Dependent Claim
69 words
A thermoplastic composition comprising a blend of about 15 to about 65 parts by weight thermoplastic crystalline polyolefin resin and about 85 to about 35 parts by weight cross-linked chlorosulfonated polyethylene rubber per 100 total parts by weight polyolefin resin and chlorosulfonated polyethylene rubber, in which the chlorosulfonated polyethylene rubber is cross-linked to the extent that no more than forty weight percent of the rubber is extractable in toluene.
Claim 3
Dependent Claim
14 words
The composition of claim 1 in which the polyolefin resin is polyethylene or polypropylene.
Claim 4
Dependent Claim
30 words
The composition of claim 2 in which the chlorosulfonated polyethylene rubber is cross-linked to the extent that no more than twenty weight percent of the rubber is extractable in toluene.
Claim 5
Dependent Claim
28 words
The composition of claim 3 comprising about 20 to about 60 parts by weight polyolefin resin and about 80 to about 40 parts by weight chlorosulfonated polyethylene rubber.
Claim 6
Dependent Claim
28 words
The composition of claim 4 in which the chlorosulfonated polyethylene rubber is in the form of dispersed particles of a size of 50 microns number average or less.
Claim 7
Dependent Claim
12 words
The composition of claim 5 in which the polyolefin resin is polyethylene.
Claim 8
Dependent Claim
12 words
The composition of claim 5 in which the polyolefin resin is polypropylene.
Claim 9
Dependent Claim
69 words
An elastoplastic composition comprising thermoplastic crystalline polyolefin resin in an amount sufficient to impart thermoplasticity up to 50 weight percent of the composition, chlorosulfonated polyethylene rubber cross-linked to the extent that no more than twenty weight percent of the rubber is extractable in toluene, in an amount sufficient to impart rubberlike elasticity up to 85 weight percent of the composition, which composition is elastomeric and processable as a thermoplastic.
Claim 10
Dependent Claim
69 words
An elastoplastic composition comprising thermoplastic crystalline polyolefin resin in an amount sufficient to impart thermoplasticity up to 50 weight percent of the composition, chlorosulfonated polyethylene rubber cross-linked to the extent that no more than twenty weight percent of the rubber is extractable in toluene, in an amount sufficient to impart rubberlike elasticity up to 85 weight percent of the composition, which composition is elastomeric and processable as a thermoplastic.
Claim 11
Dependent Claim
44 words
The composition of claim 8 comprising a blend of about 15 to about 50 parts by weight polyolefin resin and about 85 to about 50 parts by weight of chlorosulfonated polyethylene rubber per 100 total parts by weight polyolefin resin and chlorosulfonated polyethylene rubber.
Claim 12
Dependent Claim
14 words
The composition of claim 9 in which the polyolefin resin is polyethylene or polypropylene.
Claim 13
Dependent Claim
30 words
The composition of claim 10 in which the chlorosulfonated polyethylene rubber is cross-linked to the extent that no more than ten weight percent of the rubber is extractable in toluene.
Claim 14
Dependent Claim
35 words
The composition of claim 11 comprising about 20-45 parts by weight polyolefin resin and about 80-55 parts by weight chlorosulfonated polyethylene rubber per 100 parts by weight of polyolefin resin and chlorosulfonated polyethylene rubber combined.
Claim 15
Dependent Claim
28 words
The composition of claim 12 in which the chlorosulfonated polyethylene rubber is in the form of dispersed particles of a size of 50 microns number average or less.
Claim 16
Dependent Claim
23 words
The composition of claim 13 in which the size of the dispersed cross-linked chlorosulfonated polyethylene rubber particles is below 10 microns number average.
Claim 17
Dependent Claim
12 words
The composition of claim 14 in which the polyolefin resin is polyethylene.
Claim 18
Dependent Claim
12 words
The composition of claim 14 in which the polyolefin resin is polypropylene.
Claim 19
Dependent Claim
24 words
The composition of claim 8 which contains up to 60 parts by weight rubber plasticizer per 100 parts by weight of chlorosulfonated polyethylene rubber.
Claim 20
Dependent Claim
13 words
The composition of claim 17 in which the plasticizer is aromatic processing oil.
Claim 21
Dependent Claim
32 words
The composition of claim 17 in which the combined weight of plasticizer and chlorosulfonated polyethylene rubber exceeds the weight of polyolefin resin but does not exceed 85 weight percent of the composition.
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) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |