US4540729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester moulding compositions
Assignee: Bip Chemicals Ltd
•
Filing: 1984-09-13
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Granted: 1985-09-10
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Expires: 2004-09-13
Abstract
Abstract A moulding composition comprises a polyethylene terephthalate with a nucleant, polycaprolactone of molecular weight above 10,000 and an epoxidized unsaturated triglyceride. The amount of epoxidized triglyceride is preferably not more than 10 parts per 100 parts total polymer and the amount of polycaprolactone is preferably 2.5 to 25 parts per 100 parts total polymer.
Inventors
- 👤 Richard S. Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:59
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1515; C08L; C08L67/00; C08L67/02; Y; Y10; Y10S; Y10S260/00; Y10S260/35
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
48 words
A polyester moulding composition which comprises polyethylene terephthalate, or a polyesther containing at least 80% of polyethylene terephthalate repeating units, polycaprolactone having a number average molecular weight over 10,000, a nucleant for crystallisation of the polyethylene terephthalate and an epoxidised unsaturated triglyceride containing at least one epoxide group.
Claim 2
Dependent Claim
48 words
A polyester moulding composition which comprises polyethylene terephthalate, or a polyesther containing at least 80% of polyethylene terephthalate repeating units, polycaprolactone having a number average molecular weight over 10,000, a nucleant for crystallisation of the polyethylene terephthalate and an epoxidised unsaturated triglyceride containing at least one epoxide group.
Claim 3
Dependent Claim
16 words
A composition according to claim 1 in which the epoxidised unsaturated triglyceride is an individual compound.
Claim 4
Dependent Claim
14 words
A composition according to claim 2 in which the compound is mono-epoxidised soybean oil.
Claim 5
Dependent Claim
18 words
A composition according to claim 1 in which the nucleant comprises a metal salt of an organic acid.
Claim 6
Dependent Claim
31 words
A composition according to claim 1 or 4 in which the nucleant comprises a finely divided solid material which does not melt at or below the melting point of polyethylene terephthalate.
Claim 7
Dependent Claim
28 words
A composition according to claim 1 in which the amount of polycaprolactone is in the range 2.5 to 25 parts per 100 parts by weight of total polymer.
Claim 8
Dependent Claim
20 words
A composition according to claim 1 in which the polycaprolactone has a number average molecular weight of at least 20,500.
Claim 9
Dependent Claim
28 words
A composition according to claim 1 in which the amount of epoxidised unsaturated triglyceride is not more than 10 parts by 100 parts by weight of total polymer.
Claim 10
Dependent Claim
31 words
A composition according to claim 8 in which the amoount of epoxidised unsaturated triglyceride is in the range 1 to 6 parts by weight per 100 parts by weight total polymer.
Claim 11
Dependent Claim
11 words
A composition according to claim 1 which includes a reinforcing fibre.
Claim 12
Dependent Claim
77 words
A polyester moulding composition which comprises a polyester containing 80% to 100% of polyethylene terephthalate repeating units, 2.5 to 25 parts by weight of a polycaprolactone having a number average molecular weight of at least 20,500, 0.1 to 6 parts by weight per 100 parts by weight of total polymer of a nucleant for crystallisation of the polyethylene terephthalate, and 1 to 6 parts by weight of an epoxidised unsaturated triglyceride containing at least one epoxide group.
Claim 13
Dependent Claim
77 words
A polyester moulding composition which comprises a polyester containing 80% to 100% of polyethylene terephthalate repeating units, 2.5 to 25 parts by weight of a polycaprolactone having a number average molecular weight of at least 20,500, 0.1 to 6 parts by weight per 100 parts by weight of total polymer of a nucleant for crystallisation of the polyethylene terephthalate, and 1 to 6 parts by weight of an epoxidised unsaturated triglyceride containing at least one epoxide group.
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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) | 1988-09-09 | 1989-03-11 | 1989-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-09 | 1993-03-11 | 1993-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-09 | 1997-03-11 | 1997-09-10 | $7700.00 | Window Closed / Lapsed |