US4290927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanizable polyblend
Assignee: Toray Industries Inc
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Filing: 1980-04-16
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Granted: 1981-09-22
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Expires: 2000-04-16
Abstract
Abstract An intimate polyblend of about 5-90% by weight of a thermoplastic copolyester or block copolyester elastomer and about 95-10% by weight of a vulcanizable synthetic or natural rubber. The preferred copolyester is a copolyester of polybutylene terephthalate and the prefered block copolyetherester is polybutylene terophthalate-poly (tetramethylene oxide) glycol block copolyester. These polyblends can be vulcanized to elastomeric molded articles which exhibit an excellent oil and oxygen/ozone resistance even at elevated temperatures, a high impact strength, an increased scuff resistance and an improved flexibility at low and high temperatures. The vulcanized molded articles also have an improved adhesive property with polyester fibers or fabrics.
Inventors
- 👤 Chiaki Tanaka
- 👤 Masanobu Morikawa
- 👤 Yoshio Kohno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:05
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08L21/00; C08L67/025; C08L87/00; C08L87/005; C08L9/00; C08L9/02; C08L9/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
77 words
A vulcanizable polyblend which comprises an intimate mixture of about 5 to 90% by weight of a thermoplastic polyester which is a condensation polymer prepared from a dicarboxylic acid and a glycol component comprising at least 50 mol percent of 1,4-butanediol, the remainder of said glycol component being selected from the group consisting of ethylene glycol, propanediols, 1,6-hexanediol, xylylene glycol, cyclohexane dimethanol and 1,4-cyclohexanediol; said polyblend also comprising 95 to 10% by weight of a vulcanizable rubber.
Claim 2
Dependent Claim
77 words
A vulcanizable polyblend which comprises an intimate mixture of about 5 to 90% by weight of a thermoplastic polyester which is a condensation polymer prepared from a dicarboxylic acid and a glycol component comprising at least 50 mol percent of 1,4-butanediol, the remainder of said glycol component being selected from the group consisting of ethylene glycol, propanediols, 1,6-hexanediol, xylylene glycol, cyclohexane dimethanol and 1,4-cyclohexanediol; said polyblend also comprising 95 to 10% by weight of a vulcanizable rubber.
Claim 3
Dependent Claim
31 words
A vulcanizable polyblend as defined in claim 1 wherein said dicarboxylic acid component comprises at least one member selected from the group consisting of terephthalic acid, isophthalic acid, and orthophthalic acid.
Claim 4
Dependent Claim
22 words
A vulcanizable polyblend as defined in claim 2 wherein said dicarboxylic acid component comprises a mixture of terephthalic acid and isophthalic acid.
Claim 5
Dependent Claim
19 words
A vulcanizable polyblend as defined in claim 2 wherein said dicarboxylic acid component comprises terephthalic acid and orthophthalic acid.
Claim 6
Dependent Claim
31 words
A vulcanizable polyblend as defined in claim 2 wherein said dicarboxylic acid component comprises a mixture of terephthalic acid and isophthalic acid and wherein said glycol component consists essentially of 1,4-butanediol.
Claim 7
Dependent Claim
31 words
A vulcanizable polyblend as defined in claim 2 wherein said dicarboxylic acid component comprises a mixture of terephthalic acid and orthophthalic acid and wherein said glycol component consists essentially of 1,4-butanediol.
Claim 8
Dependent Claim
16 words
A vulcanizable polyblend as defined in claim 2 wherein said glycol component consists essentially of 1,4-butanediol.
Claim 9
Dependent Claim
14 words
A vulcanizable polyblend as defined in claim 1 wherein the rubber comprises styrene-butandiene rubber.
Claim 10
Dependent Claim
14 words
A vulcanizable polyblend as defined in claim 1 wherein the rubber comprises nitrile rubber.
Claim 11
Dependent Claim
14 words
A vulcanizable polyblend as defined in claim 1 wherein the rubber comprises chloroprene rubber.
Claim 12
Dependent Claim
14 words
A vulcanizable polyblend as defined in claim 1, wherein the rubber comprises ethylene-propylene-diene rubber.
Claim 13
Dependent Claim
14 words
A vulcanizable polyblend as defined in claim 1 wherein the rubber comprises natural rubber.
Claim 14
Dependent Claim
30 words
A vulcanizable polyblend as defined in claim 1 wherein the amount of said polyester is 5-50% by weight and that of the vulcanizable rubber is 95 to 50% by weight.
References Cited (Backward Citations)
US3965055A
Cited
US3963802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-21 | 1985-03-23 | 1985-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-21 | 1989-03-23 | 1989-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-21 | 1993-03-23 | 1993-09-22 | $7700.00 | Window Closed / Lapsed |