US4859732A
Expired / Lapsed
US
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Reinforced molding composition based on poly(1,4-cyclohexylene dimethylene terephthalate) having improved crystallization characteristics
Assignee: EIDP Inc
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Filing: 1988-02-22
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Granted: 1989-08-22
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Expires: 2008-02-22
Abstract
Abstract A glass fiber reinforced composition comprising (a) a poly(1,4-cyclohexylene dimethylene terephthalate) resin, (b) 10-50% based on total composition weight of glass reinforcing fibers, and (c) a crystallization promoting amount of at least one linear alcohol having 30-50. These resin compositions have excellent strength, stiffness, and heat resistance and can be molded at temperatures below 150° C.
Inventors
- 👤 Larry A. Minnick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:13
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08K; C08K5/00; C08K5/04; C08K5/05; C08K13/00; C08K13/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
43 words
A glass fiber reinforced composition, comprising: (a) a poly(1,4 cyclohexylene dimethylene terephthalate) resin having an I.V. of about 0.5-1.0, (b) 10-50 wt % of glass reinforcing fibers, and (c) a crystallization promoting amount of at least one linear alcohol having 30-50 carbon atoms.
Claim 2
Dependent Claim
43 words
A glass fiber reinforced composition, comprising: (a) a poly(1,4 cyclohexylene dimethylene terephthalate) resin having an I.V. of about 0.5-1.0, (b) 10-50 wt % of glass reinforcing fibers, and (c) a crystallization promoting amount of at least one linear alcohol having 30-50 carbon atoms.
Claim 3
Dependent Claim
24 words
The composition of claim 1, wherein said poly(1,4 cyclohexylene dimethylene terephthalate) comprises up to 10 mol % of a copolymerizable acid or diol monomer.
Claim 4
Dependent Claim
38 words
The composition of claim 2, wherein said copolymerizable monomer is selected from the group consisting of isophthalic acid, naphthalenedicarboxylic acid, cyclohexane dicarboxylic acid, succinic acid, sebacic acid, adipic acid, ethylene glycol, diethylene glycol, butanediol, hexanediol and neopentyl glycol.
Claim 5
Dependent Claim
22 words
The composition of claim 1, wherein said glass reinforcing fibers are in the form of glass filaments, fibers, chopped strands or whiskers.
Claim 6
Dependent Claim
19 words
The composition of claim 1, wherein the inherent viscosity of said poly(1,4 cyclohexylene dimethylene terephthalate) is greater than 0.5.
Claim 7
Dependent Claim
19 words
The composition of claim 5, wherein said inherent viscosity is in the range from about 0.5 to about 1.0.
Claim 8
Dependent Claim
19 words
The composition of claim 1, wherein said glass reinforcing fibers are present in 10-50% based on total composition weight.
Claim 9
Dependent Claim
23 words
The composition of claim 1, wherein said glass fibers have a length in the range from about 1/8 inch to about 2 inches.
Claim 10
Dependent Claim
26 words
The composition of claim 1, wherein said linear alcohol is present in an amount from about 2 to about 10% based on the total composition weight.
Claim 11
Dependent Claim
26 words
The composition of claim 9, wherein said linear alcohol is present in an amount from about 4 to about 6% based on the total composition weight.
Claim 12
Dependent Claim
21 words
The composition of claim 1, wherein said linear alcohol has an average molecular weight of from about 400 to about 700.
Claim 13
Dependent Claim
23 words
The composition of claim 1, further comprising an additive selected from the group consisting of stabilizers, colorants, lubricants, fire retardants, and processing aids.
Claim 14
Dependent Claim
9 words
A molded article of the composition of claim 1.
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) | 1992-08-21 | 1993-02-20 | 1993-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-21 | 1997-02-20 | 1997-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-21 | 2001-02-20 | 2001-08-22 | $7700.00 | Window Closed / Lapsed |