US3742087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic blends of aromatic polysulfones and thermoplastic polyesters
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1970-09-15
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Granted: 1973-06-26
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Expires: 1990-09-15
Abstract
Abstract Thermoplastic polymer blends which contain from 99.9 percent to 1 percent of one or more aromatic polysulphones and from 0.1 percent to 99 percent of one or more thermoplastic polyesters have a desirable combination of physical properties and in particular better flow properties in the melt than the polysulphones themselves.
Inventors
- 👤 E Nield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:57
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08L81/00; C08L81/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
19 words
A blend according to claim 1 which contains a polysulphone having at least some repeating units of the structure
Claim 2
Dependent Claim
16 words
A blend according to claim 1 which contains a polysulphone having repeating units of the formula
Claim 3
Dependent Claim
16 words
A blend according to claim 1 which contains a polysulfone having repeating units of the formula
Claim 4
Dependent Claim
16 words
A blend according to claim 1 which contains a polysulphone having repeating units of the formula
Claim 5
Dependent Claim
15 words
A blend according to claim 1 which contains a polysulphone having units of the formulae
Claim 6
Dependent Claim
21 words
A blend according to claim 1 which contains a polyester of one or more dicarboxylic acids of benzene, naphthalene and biphenyl.
Claim 7
Dependent Claim
28 words
A blend according to claim 1 which contains a polyester of one or more members of the group consisting of aromatic disulphonic acids of benzene, naphthalene and biphenyl.
Claim 8
Dependent Claim
19 words
A blend according to claim 1 which contains a polyester of a glycol containing two to 14 carbon atoms.
Claim 9
Dependent Claim
25 words
A blend according to claim 1 which contains a polyester of a dihydric phenol selected from the group consisting of bis-(4-hydroxyphenyl) sulfone and bisphenol A.
Claim 10
Dependent Claim
16 words
A blend according to claim 1 which contains at least 1 percent by weight of polyester.
Claim 11
Dependent Claim
17 words
A blend according to claim 1 which contains not more than 40 percent by weight of polyester.
Claim 12
Dependent Claim
17 words
A blend according to claim 1 which contains from 1 to 5 percent by weight of polyester.
Claim 13
Dependent Claim
10 words
A blend according to claim 1 which contains a filler.
Claim 14
Dependent Claim
12 words
A blend as claimed in claim 1 in the form of fibre.
Claim 15
Dependent Claim
12 words
A blend as claimed in claim 1 in the form of film.
Claim 16
Dependent Claim
14 words
A blend as claimed in claim 1 in the form of an injection moulding.
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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |