US4882375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyesters with modified melt viscosity
Assignee: General Electric Co
•
Filing: 1988-09-01
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Granted: 1989-11-21
•
Expires: 2008-09-01
Abstract
Abstract The melt viscosity of polyesters is modified by adding thereto a minor amount of a sulfonated salt of a carboxylic acid.
Inventors
- 👤 John A. Tyrell
- 👤 Lawrence R. Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:53
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
53 words
A polyester compostion comprising a polyester resin and a melt viscosity lowering amount of a sulfonate salt of a carboxylic acid which has the formula R(COOH) x , wherein R is an alkyl group having from about 1 to about 20 carbon atoms or an aryl group, and x is 1 or 2.
Claim 2
Dependent Claim
53 words
A polyester compostion comprising a polyester resin and a melt viscosity lowering amount of a sulfonate salt of a carboxylic acid which has the formula R(COOH) x , wherein R is an alkyl group having from about 1 to about 20 carbon atoms or an aryl group, and x is 1 or 2.
Claim 3
Dependent Claim
55 words
The composition of claim 1 wherein the polyester resin is a high molecular weight linear thermoplastic polyester resin selected from the group consisting of polymeric glycol terephthalate and isophthalate esters having repeating units of the general formula: ##STR5## wherein n is a whole number of from 2 to 10, or a mixture of such esters.
Claim 4
Dependent Claim
14 words
The composition as defined in claim 2 wherein the polyester is a poly ester.
Claim 5
Dependent Claim
12 words
The composition as defined in claim 3 wherein the polyester is poly.
Claim 6
Dependent Claim
13 words
The composition as defined in claim 2 wherein the polyester is poly ester.
Claim 7
Dependent Claim
14 words
The composition as defined in claim 1 wherein the carboxylic acid is isophthalic acid.
Claim 8
Dependent Claim
12 words
The composition of claim 1 wherein the carboxylic acid is benzoic acid.
Claim 9
Dependent Claim
11 words
The composition of claim 1 which further comprises an aromatic polycarbonate.
Claim 10
Dependent Claim
13 words
The composition of claim 8 which further comprises at least one flame retardant.
Claim 11
Dependent Claim
17 words
The composition of claim 9 wherein the flame retardant is an halogenated aromatic polycarbonate or oligomer thereof.
Claim 12
Dependent Claim
32 words
The composition of claim 1 wherein the sulfonated salt of a carboxylic acid is present in an amount that ranges from about 0.01% to about 15% by weight of the total composition.
Claim 13
Dependent Claim
32 words
The composition of claim 11 wherein the sulfonated salt of a carboxylic acid is present in an amount that ranges from about 0.1% to about 5% by weight of the total composition.
References Cited (Backward Citations)
US3915926A
Cited
US4581398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-20 | 2001-05-22 | 2001-11-21 | $7700.00 | Window Closed / Lapsed |