Patent US3859246A successfully refreshed from Google Patents.
US3859246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butanediol polyester compositions containing talc and having improved heat-distortion temperatures
Assignee: Eastman Kodak Co
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Filing: 1973-11-30
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Granted: 1975-01-07
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Expires: 1993-11-30
Abstract
Abstract The heat-distortion temperature of linear polyesters of 1,4butanediol and terephthalic acid can be increased by at least 20*C. by incorporating therein at least about 10 percent by weight of a talc filler.
Inventors
- 👤 Jr Winston J Jackson
- 👤 Herbert F Kuhfuss
- 👤 John R Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:35
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
71 words
A STIFF, THERMOPLASTICALLY MOLDABLE COMPOSITION HAVING AN APPRECIABLY INCREASED HEAT DISTORTION TEMPERATURE COMPRISING A LINEAR POLYESTER OF AT LEAST ABOUT 80 MOLE PROPORTIONS OF 1,4-BUTANEDIOL, BASED ON 100 PROPORTIONS OF DIOL, AND AT LEAST 80 MOLE PROPORTIONS OF TEREPHTHALIC ACID, BASED ON 100 MOLE PROPORTIONS OF DICARBOXYLIC ACID, OR THEIR CONDENSABLE DERIVATIVES, HAVING INCORPORATED THEREIN AT LEAST ABOUT 10 PERCENT BY WEIGHT OF TALC, BASED ON THE WEIGHT OF SAID COMPOSITIONS.
Claim 2
Dependent Claim
71 words
A STIFF, THERMOPLASTICALLY MOLDABLE COMPOSITION HAVING AN APPRECIABLY INCREASED HEAT DISTORTION TEMPERATURE COMPRISING A LINEAR POLYESTER OF AT LEAST ABOUT 80 MOLE PROPORTIONS OF 1,4-BUTANEDIOL, BASED ON 100 PROPORTIONS OF DIOL, AND AT LEAST 80 MOLE PROPORTIONS OF TEREPHTHALIC ACID, BASED ON 100 MOLE PROPORTIONS OF DICARBOXYLIC ACID, OR THEIR CONDENSABLE DERIVATIVES, HAVING INCORPORATED THEREIN AT LEAST ABOUT 10 PERCENT BY WEIGHT OF TALC, BASED ON THE WEIGHT OF SAID COMPOSITIONS.
Claim 3
Dependent Claim
37 words
The composition of claim 1 wherein the heat distortion temperature of test bars annealed for 30 minutes at 110*C. is increased to at least 20*C. greater than the heat distortion temperature obtained when no talc is present.
Claim 4
Dependent Claim
11 words
The composition of claim 1 wherein the polyester is poly(tetramethylene terephthalate).
Claim 5
Dependent Claim
20 words
The composition of claim 1 wherein the amount of talc is about 10 percent up to 30 percent by weight.
Claim 6
Dependent Claim
59 words
A stiff, thermoplastically moldable composition comprising linear poly(tetramethylene terephthalate) having incorporated therein about 10 percent up to 30 percent by weight talc, based on the weight of the composition, wherein the temperature of test bars annealed for 30 minutes at 110*C. is increased to at least 20*C. greater than the heat distortion temperature obtained when no talc is present.
Claim 7
Dependent Claim
59 words
A stiff, thermoplastically moldable composition comprising linear poly(tetramethylene terephthalate) having incorporated therein about 10 percent up to 30 percent by weight talc, based on the weight of the composition, wherein the temperature of test bars annealed for 30 minutes at 110*C. is increased to at least 20*C. greater than the heat distortion temperature obtained when no talc is present.
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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |