US4239862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic elastomer containing long chain aliphatic alcohol
Assignee: Uniroyal Chemical Co Inc
•
Filing: 1979-12-13
•
Granted: 1980-12-16
•
Expires: 1999-12-13
Abstract
Abstract Long chain aliphatic alcohol (C 16 +) is added to thermoplastic elastomer based on blend of olefin copolymer rubber (EPM or EPDM) and polyolefin resin (especially polypropylene). The blend may be uncured or dynamically partially cured. The long chain aliphatic alcohol permits injection molded articles to be demolded within a shorter time without tearing or distortion, and decreases the surface tackiness of the article.
Inventors
- 👤 Demetreos N. Matthews
- 👤 Walter Nudenberg
- 👤 Henno A. Petersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:55
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/05; B; B29; B29C; B29C33/00; B29C33/56; B29C33/60; C08K5/14; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/16; C08L23/18; C08L23/24; C08L91/00; B29K; B29K2023/00; B29K2995/00; B29K2995/0037; B29K2995/0046; C08L2205/00; C08L2205/02; C08L2205/025; C08L2205/03; C08L2205/035; C08L2207/00; C08L2207/10; C08L2207/14; C08L2312/00; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
143 words
A thermoplastic elastomer comprising a blend of: (A) a monoolefin copolymer rubber which is a copolymer of ethylene and an alpha-monoolefin of the formula CH 2 ═CHR where R is an alkyl radical having 1 to 12 carbon atoms, and optionally a copolymerizable diene termonomer; (B) a crystalline polyolefin resin; (C) a long-chain aliphatic alcohol having at least 16 carbon atoms; (D) optionally an amorphous non-elastomeric polypropylene homopolymer or amorphous non-elastomeric copolymer of propylene with another monoolefin; and (E) optionally a naphthenic or paraffinic extender oil; the said ingredients being present in the following proportions, expressed as percentages by weight based on the total weight of (A), (B), (C), (D) and (E): from 15 to 80% of (A); from 15 to 80% of (B); from 3 to 40% of (C); from 0 to 45% of (D); and from 0 to 40% of (E).
Claim 2
Dependent Claim
143 words
A thermoplastic elastomer comprising a blend of: (A) a monoolefin copolymer rubber which is a copolymer of ethylene and an alpha-monoolefin of the formula CH 2 ═CHR where R is an alkyl radical having 1 to 12 carbon atoms, and optionally a copolymerizable diene termonomer; (B) a crystalline polyolefin resin; (C) a long-chain aliphatic alcohol having at least 16 carbon atoms; (D) optionally an amorphous non-elastomeric polypropylene homopolymer or amorphous non-elastomeric copolymer of propylene with another monoolefin; and (E) optionally a naphthenic or paraffinic extender oil; the said ingredients being present in the following proportions, expressed as percentages by weight based on the total weight of (A), (B), (C), (D) and (E): from 15 to 80% of (A); from 15 to 80% of (B); from 3 to 40% of (C); from 0 to 45% of (D); and from 0 to 40% of (E).
Claim 3
Dependent Claim
11 words
A thermoplastic elastomer as in claim 1 in an uncured state.
Claim 4
Dependent Claim
13 words
A thermoplastic elastomer as in claim 1 in a dynamically partially cured state.
Claim 5
Dependent Claim
30 words
A thermoplastic elastomer as in claim 3 in which the quantity of (C) is from 5 to 25%, based on the total weight of (A), (B) (C), (D) and (E).
Claim 6
Dependent Claim
29 words
A thermoplastic elastomer as in claim 3 in which the quantity of (C) plus (E) is 8-60%, based on the total weight of (A), (B), (C), (D) and (E).
Claim 7
Dependent Claim
17 words
A thermoplastic elastomer as in claim 1 or claim 3 in which (A) is ethylene-propylene-nonconjugated diene terpolymer.
Claim 8
Dependent Claim
16 words
A thermoplastic elastomer as in claim 1 or claim 3 in which (B) is polypropylene resin.
Claim 9
Dependent Claim
22 words
A thermoplastic elastomer as in claim 1 or claim 3 in which (A) is ethylene-propylene-nonconjugated diene terpolymer and (B) is polypropylene resin.
Claim 10
Dependent Claim
21 words
A thermoplastic elastomer as in claim 1 or claim 3 in which (A) is ethylene-propylene-dicyclopentadiene terpolymer and (B) is polypropylene resin.
Claim 11
Dependent Claim
21 words
A thermoplastic elastomer as in claim 1 or claim 3 in which (A) is ethylene-propylene-ethylidenenorbornene terpolymer and (B) is polypropylene resin.
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) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |