US4486561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection-moldable thermoplastic polyester composition
Assignee: Ethyl Corp
•
Filing: 1983-07-14
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Granted: 1984-12-04
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Expires: 2003-07-14
Abstract
Abstract Improved injection moldability of polyethylene terephthalates is achieved by the addition of an epoxidized plasticizer and a nucleating agent cooperative with the epoxidized plasticizer to achieve the improved moldability even when the composition is injection molded using mold temperatures of at least as low as 93° C.
Inventors
- 👤 James Y. J. Chung
- 👤 Jesse D. Jones
- 👤 Hsueh M. Li
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:44
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08K5/15; C08K5/151; C08K5/1515
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
84 words
A thermoplastic composition which is injection-moldable at a relatively low mold temperature, said composition comprising an intimate admixture of: (a) a polyethylene terephthalate; and (b) a hydrocarbyl ester of a mono epoxidized alkenoic acid, said ester being characterized by containing from about 12 to about 50 carbon atoms in the molecule; and (c) a nucleating agent cooperative with the hydrocarbyl ester of (b) to improve the releasability from the injection mold, of articles injection molded from said composition at mold temperatures below 93° C.
Claim 2
Dependent Claim
84 words
A thermoplastic composition which is injection-moldable at a relatively low mold temperature, said composition comprising an intimate admixture of: (a) a polyethylene terephthalate; and (b) a hydrocarbyl ester of a mono epoxidized alkenoic acid, said ester being characterized by containing from about 12 to about 50 carbon atoms in the molecule; and (c) a nucleating agent cooperative with the hydrocarbyl ester of (b) to improve the releasability from the injection mold, of articles injection molded from said composition at mold temperatures below 93° C.
Claim 3
Dependent Claim
18 words
The composition of claim 1 wherein said hydrocarbyl ester is from about 16 to about 36 carbon atoms.
Claim 4
Dependent Claim
13 words
The composition of claim 1 wherein said hydrocarbyl ester is an alkyl ester.
Claim 5
Dependent Claim
18 words
The composition of claim 3 wherein the alkyl radical has from about 7 to about 36 carbon atoms.
Claim 6
Dependent Claim
18 words
The composition of claim 3 wherein the alkyl radical has from about 7 to about 23 carbon atoms.
Claim 7
Dependent Claim
12 words
The composition of claim 3 wherein the ester is an octyl ester.
Claim 8
Dependent Claim
13 words
The composition of claim 1 wherein said hydrocarbyl ester is epoxidized octyl oleate.
Claim 9
Dependent Claim
15 words
The composition of claim 1 wherein the nucleating agent is synergistically cooperative with said ester.
Claim 10
Dependent Claim
43 words
The composition of claim 8 wherein said nucleating agent is sodium carbonate, talc, boron nitride, p-hydroxybenzoic acid, an ionomer resin containing sodium ions, alumina, calcium sulfate, hydrophilic silica, calcium carbonate, antimony oxide, powdered copper, magnesium oxide, potassium bromide, barium sulfate or aluminum sulfate.
Claim 11
Dependent Claim
14 words
The composition of claim 8 wherein said nucleating agent is a monocarboxylic acid salt.
Claim 12
Dependent Claim
18 words
The composition of claim 10 wherein said salt is sodium stearate and the ester is epoxidized octyl oleate.
Claim 13
Dependent Claim
13 words
The composition of claim 1 wherein said composition additionally contains a reinforcing filler.
Claim 14
Dependent Claim
12 words
The composition of claim 12 wherein said reinforcing filler comprises glass fibers.
Claim 15
Dependent Claim
38 words
The composition of claim 1 wherein the polyethylene terephthalate has an intrinsic viscosity of 0.4 to 0.9 as measured at 25° C. in a solvent consisting of 60% by weight of phenol and 40% by weight of tetrachloroethane.
Claim 16
Dependent Claim
98 words
A thermoplastic composition which is injection-moldable at a relatively low mold temperature, said composition comprising an intimate admixture of: (a) a polyethylene terephthalate; and (b) an epoxy ester mixture comprising at least one monoepoxy aliphatic monocarboxylic acid ester and at least one diepoxy aliphatic monocarboxylic acid ester in which each of the epoxy esters contains from about 7 to about 50 carbon atoms in the molecule; and (c) a nucleating agent cooperative with the ester of (b) to improve the releasability from the injection mold, of articles injection molded from said composition at mold temperatures below 93° C.
Claim 17
Dependent Claim
98 words
A thermoplastic composition which is injection-moldable at a relatively low mold temperature, said composition comprising an intimate admixture of: (a) a polyethylene terephthalate; and (b) an epoxy ester mixture comprising at least one monoepoxy aliphatic monocarboxylic acid ester and at least one diepoxy aliphatic monocarboxylic acid ester in which each of the epoxy esters contains from about 7 to about 50 carbon atoms in the molecule; and (c) a nucleating agent cooperative with the ester of (b) to improve the releasability from the injection mold, of articles injection molded from said composition at mold temperatures below 93° C.
Claim 18
Dependent Claim
43 words
The composition of claim 15 wherein said epoxy ester mixture is derived from at least one alcohol having from one to about 20 carbon atoms and from at least two different aliphatic monocarboxylic acids having from about 6 to about 30 carbon atoms.
Claim 19
Dependent Claim
38 words
The composition of claim 16 wherein said alcohol is an alkanol having from one to about 8 carbon atoms, and wherein said aliphatic monocarboxylic acids include (i) oleic acid and (ii) linoleic acid or linolenic acid or both.
Claim 20
Dependent Claim
29 words
The composition of claim 16 wherein said alcohol is octanol and wherein said aliphatic monocarboxylic acids include (i) oleic acid and (ii) linoleic acid or linolenic acid or both.
Claim 21
Dependent Claim
18 words
The composition of claim 16 wherein said epoxy ester mixture is derived from soybean oil or linseed oil.
Claim 22
Dependent Claim
14 words
The composition of claim 19 wherein said epoxy ester mixture is octyl epoxy soyate.
Claim 23
Dependent Claim
14 words
The composition of claim 19 wherein said epoxy ester mixture is octyl epoxy linseedate.
Claim 24
Dependent Claim
43 words
The composition of claim 15 wherein said epoxy ester mixture is derived from at least two different alcohols having from one to about 20 carbon atoms and from at least one aliphatic monocarboxylic acid having from about 6 to about 30 carbon atoms.
Claim 25
Dependent Claim
18 words
The composition of claim 15 wherein said epoxy ester mixture is derived from vegetable oils or vegetable fats.
Claim 26
Dependent Claim
20 words
The composition of claim 15 wherein said epoxy ester mixture is derived from the fatty acid fraction of tall oil.
Claim 27
Dependent Claim
14 words
The composition of claim 24 wherein said epoxy ester mixture is octyl epoxy tallate.
Claim 28
Dependent Claim
14 words
The composition of claim 15 wherein the nucleating agent is a monocarboxylic acid salt.
Claim 29
Dependent Claim
28 words
The composition of claim 26 wherein said nucleating agent is sodium stearate and the epoxy ester mixture is octyl epoxy soyate, octyl epoxy linseedate or octyl epoxy tallate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-04 | 1988-06-04 | 1988-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-04 | 1992-06-04 | 1992-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-04 | 1996-06-04 | 1996-12-04 | $7700.00 | Window Closed / Lapsed |