US4506050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene terephthalate molding compositions
Assignee: Honeywell International Inc
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Filing: 1983-12-05
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Granted: 1985-03-19
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Expires: 2003-12-05
Abstract
Abstract Polyethylene terephthalate molding compositions are provided which comprise a polyethylene terephthalate having an inherent viscosity of at least 0.4, a plasticizer, a lubricating polymer, a nucleating agent, a reinforcing agent or mixture of reinforcing agent and filler, and a molecular weight reducing agent for the polyethylene terephthalate. The molding compositions can be injection molded utilizing mold temperatures below 100 DEG C. (e.g, 60 DEG -90 DEG C.). The molded compositions exhibit an excellent balance of properties such as tensile strength, flex modulus, heat distortion temperature and impact strength.
Inventors
- 👤 William L. Hergenrother
- 👤 John M. Doshak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:14
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
212 words
Polyethylene terphthalate molding compositions which can be molded at temperatures of 100° C. or less comprising: (a) from about 40 to about 70 parts by weight per 100 parts of total composition of a polyethylene terephthalate having an intrinsic viscosity of 0.4 to 1.0 dl/g as measured at 25° C. in a 1:1 mixture of phenol and tetrachloroethane; (b) from about 0.5 to about 5.0 parts by weight per 100 parts by weight of total composition of a plasticizer selected from the group consisting of dioctyl phthalate, butyl benzyl phthalate and phosphate esters; (c) from about 0.5 to about 10.0 parts by weight per 100 parts by weight of total composition of a lubricating polymer; (d) from about 0.1 to about 5.0 parts by weight per 100 parts by weight of total composition of a nucleating agent; (e) from about 20 to about 60 parts by weight per 100 parts by weight of total composition of a reinforcing material or mixture of reinforcing material and filler; and (f) from about 0.01 to about 1.0 parts by weight per 100 parts by weight of total composition of a molecular weight reducing agent for said polyethylene terephthalate, wherein said molecular weight reducing agent is selected from the group consisting of neopentyl glycol and water.
Claim 2
Dependent Claim
212 words
Polyethylene terphthalate molding compositions which can be molded at temperatures of 100° C. or less comprising: (a) from about 40 to about 70 parts by weight per 100 parts of total composition of a polyethylene terephthalate having an intrinsic viscosity of 0.4 to 1.0 dl/g as measured at 25° C. in a 1:1 mixture of phenol and tetrachloroethane; (b) from about 0.5 to about 5.0 parts by weight per 100 parts by weight of total composition of a plasticizer selected from the group consisting of dioctyl phthalate, butyl benzyl phthalate and phosphate esters; (c) from about 0.5 to about 10.0 parts by weight per 100 parts by weight of total composition of a lubricating polymer; (d) from about 0.1 to about 5.0 parts by weight per 100 parts by weight of total composition of a nucleating agent; (e) from about 20 to about 60 parts by weight per 100 parts by weight of total composition of a reinforcing material or mixture of reinforcing material and filler; and (f) from about 0.01 to about 1.0 parts by weight per 100 parts by weight of total composition of a molecular weight reducing agent for said polyethylene terephthalate, wherein said molecular weight reducing agent is selected from the group consisting of neopentyl glycol and water.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein said phosphate ester is trixylyl phosphate.
Claim 4
Dependent Claim
11 words
The composition of claim 1 wherein said lubricating polymer is polystyrene.
Claim 5
Dependent Claim
23 words
The composition of claim 1 wherein said lubricating polymer is a polyethylene containing 2% epoxy groups or a polyethylene containing 7% epoxy groups.
Claim 6
Dependent Claim
14 words
The composition of claim 1 wherein said lubricating polymer is an ethylene/propylene/diene monomer terpolymer.
Claim 7
Dependent Claim
19 words
The composition of claim 1 wherein said lubricating polymer is a maleic anhydride adduct of an ethylene/propylene/diene monomer terpolymer.
Claim 8
Dependent Claim
12 words
The composition of claim 1 wherein said nucleating agent is zinc borate.
Claim 9
Dependent Claim
15 words
The composition of claim 1 wherein said filler material is mica, talc, clay or vermiculite.
Claim 10
Dependent Claim
23 words
The composition of claim 1 further comprising flame retardant additives selected from the group consisting of metallic compounds, halogenated compounds and mixtures thereof.
Claim 11
Dependent Claim
20 words
The composition of claim 9 wherein the flame retardant additive is a mixture of zinc borate and decabromophenylether or ethylene-bis-3,4,5,6-tetrabromophthalimide.
Claim 12
Dependent Claim
32 words
The composition of claim 10 containing from about 0.2 to about 6 parts by weight of zinc borate and from about 8 to about 14 parts by weight of decabromophenylether or ethylene-bis-3,4,5,6-tetrabromophthalimide.
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) | 1988-03-18 | 1988-09-17 | 1989-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-18 | 1992-09-17 | 1993-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-18 | 1996-09-17 | 1997-03-19 | $7700.00 | Window Closed / Lapsed |