US4521554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polybutylene terephthalate molding composition with high cold impact strength and amenable to thermoplastic processing
Assignee: Huels AG
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Filing: 1984-02-22
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Granted: 1985-06-04
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Expires: 2004-02-22
Abstract
Abstract A molding composition having cold impact strength and amenable to thermoplastic processing, comprises (A) 66-95% by weight of polybutylene terephthalate with a viscosity number (J) of 70 to 240 cc/g and (B) 34-5% by weight of a reaction product of 1. 99-75% by weight of an ethylene/α-olefin/diene terpolymer having a Mooney viscosity in the range from 30 to 130 and 2. 1-25% by weight of bicyclo[2,2,2]-2,3;5,6-dibenzooctadiene-(2,5)-dicarboxylic acid-(7,8)-anhydride.
Inventors
- 👤 Michael Droscher
- 👤 Christian Gerth
- 👤 Klaus Burzin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:39
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/092; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
134 words
A thermoplastically processable molding composition of high cold impact strength, comprising (A) 66-95% by weight of polybutylene terephthalate of a viscosity number (J), according to DIN [German Industrial Standard] 16 779, Part 2, of 70 to 240 cc/g, and (B) 34-35% by weight of the addition reaction product of (a) 99-75% by weight, based on the total weight of component (B), of an ethylene/α-olefin/diene terpolymer comprising 45-75 percent by weight of ethylene, 20-45 percent by weight of a C 3-8 -α-olefin, and 2-10 parts by weight of a C 5 -C 20 -cyclic or acyclic unconjugated alkane diene, wherein the terpolymer has a Mooney viscosity, ML 1+4 at 100° C., measured according to DIN 53 523, of 30-130, and (b) 1-25% by weight, based on the total weight of component (B), of bicyclo[2,2,2]-2,3;5,6-dibenzooctadiene-(2,5)-dicarboxylic acid-(7,8)-anhydride.
Claim 2
Dependent Claim
134 words
A thermoplastically processable molding composition of high cold impact strength, comprising (A) 66-95% by weight of polybutylene terephthalate of a viscosity number (J), according to DIN [German Industrial Standard] 16 779, Part 2, of 70 to 240 cc/g, and (B) 34-35% by weight of the addition reaction product of (a) 99-75% by weight, based on the total weight of component (B), of an ethylene/α-olefin/diene terpolymer comprising 45-75 percent by weight of ethylene, 20-45 percent by weight of a C 3-8 -α-olefin, and 2-10 parts by weight of a C 5 -C 20 -cyclic or acyclic unconjugated alkane diene, wherein the terpolymer has a Mooney viscosity, ML 1+4 at 100° C., measured according to DIN 53 523, of 30-130, and (b) 1-25% by weight, based on the total weight of component (B), of bicyclo[2,2,2]-2,3;5,6-dibenzooctadiene-(2,5)-dicarboxylic acid-(7,8)-anhydride.
Claim 3
Dependent Claim
19 words
A composition of claim 1 comprising 75-90% of weight of component (A) and 25-10% of weight of component (B).
Claim 4
Dependent Claim
26 words
A composition of claim 1 wherein, in component (B), the amount of component (a) is 97-85% by weight and of component (b) is 3-15% by weight.
Claim 5
Dependent Claim
34 words
A composition of claim 1 wherein, in terpolymer component (B) (a), the relative amounts of monomers are 60-75 weight % of ethylene, 20-30 weight % of α-olefin and 5-10 weight % of unconjugated diene.
Claim 6
Dependent Claim
16 words
A composition of claim 1 wherein the viscosity number of the polybutylene terephthalate is 80-180 cc/g.
Claim 7
Dependent Claim
32 words
A composition of claim 1 wherein an amount up to 20 mole % of the terephthalic acid component is replaced by a corresponding molar amount of a C 6-20 -alkane dicarboxylic acid.
Claim 8
Dependent Claim
34 words
A composition of claim 1 wherein an amount up to 20 mole % of the 1,4-butanediol component is replaced by a corresponding molar amount of a C 2-20 -alkane diol or a cyclohexane diol.
Claim 9
Dependent Claim
15 words
A composition of claim 1 wherein the α-olefin in the terpolymer is propylene or butene-1.
Claim 10
Dependent Claim
22 words
A composition of claim 1 wherein the unconjugated diene in the terpolymer is cis- and trans-1,4-hexadiene, (dicyclopentane)-diene, or 5-methylene-, 5-ethylidene-, or 5-isopropylidene-2-norbornene.
Claim 11
Dependent Claim
14 words
A composition of claim 1 wherein the terpolymer has a Mooney viscosity of 35-85.
Claim 12
Dependent Claim
21 words
A composition of claim 1 wherein the terpolymer contains an amount of an inert detackifier of up to 5 weight %.
Claim 13
Dependent Claim
14 words
A composition of claim 1 wherein components (A) and (B) are blended by remelting.
Claim 14
Dependent Claim
42 words
A composition of claim 12 wherein, after the remelting operation, the mixture of (A) and (B) is subjected to a thermal aftertreatment in the substantial absence of oxygen at a temperature up to 5° C. below the melting point of the composition.
Claim 15
Dependent Claim
23 words
In a method of molding a polybutylene terephthalate composition into a shaped body, the improvement wherein said composition is that of claim 1.
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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) | 1988-06-03 | 1988-12-03 | 1989-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-03 | 1992-12-03 | 1993-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-03 | 1996-12-03 | 1997-06-04 | $7700.00 | Window Closed / Lapsed |