US4018738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly(butyleneterephthalate) composition with novaculite
Assignee: Bayer Corp
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Filing: 1976-02-06
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Granted: 1977-04-19
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Expires: 1996-02-06
Abstract
Abstract Mineral filled poly(butyleneterephthalate)s are comprised of a poly(butyleneterephthalate) resin and 10 to 50 percent by weight of a novaculite mineral filler having an average particle size of less than 5 microns. Articles molded from the novaculite filled poly(butyleneterephthalate) exhibit improved impact properties over typical fillers for poly(butyleneterephthalate) resins. Impact properties can be further improved by the addition of a silane coupling agent to the poly(butyleneterephthalate) novaculite blend.
Inventors
- 👤 Herbert L. Rawlings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:54
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; C08K3/36
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
53 words
A filled synthetic resinous composition comprising 50 to 90 percent by weight of a. poly(butyleneterephthalate) resin characterized by the repeating structural formula: ##STR3## said poly(butyleneterephthalate) having an intrinsic viscosity of 0.6 to 1.5; and, b. from 10 to 50 percent by weight novaculite having an average particle size of up to 5 microns.
Claim 2
Dependent Claim
53 words
A filled synthetic resinous composition comprising 50 to 90 percent by weight of a. poly(butyleneterephthalate) resin characterized by the repeating structural formula: ##STR3## said poly(butyleneterephthalate) having an intrinsic viscosity of 0.6 to 1.5; and, b. from 10 to 50 percent by weight novaculite having an average particle size of up to 5 microns.
Claim 3
Dependent Claim
17 words
The composition of claim 1 wherein said novaculite has a particle size of less than 10 microns.
Claim 4
Dependent Claim
16 words
The composition of claim 1 wherein said poly(butyleneterephthalate) has an intrinsic viscosity of 0.7 to 1.3.
Claim 5
Dependent Claim
29 words
The composition of claim 1 wherein said novaculite is present from 20 to 50 percent by weight and said poly(butyleneterephthalate) is present from 50 to 80 percent by weight.
Claim 6
Dependent Claim
17 words
The composition of claim 1 including up to 2 percent by weight of a silane coupling agent.
Claim 7
Dependent Claim
11 words
The composition of claim 5 wherein said coupling agent is gamma-aminopropyltrialkoxysilane.
Claim 8
Dependent Claim
57 words
A synthetic resinous composition comprising: a. from 50 to 90 percent by weight of poly(butyleneterephthalate characterized by the repeating structural formula: ##STR4## said poly(butyleneterephthalate) having an intrinsic viscosity of 0.6 to 1.5; and, b. an inorganic filler consisting essentially of 10 to 50 percent by weight novaculite having an average particle size of less than 5 microns.
Claim 9
Dependent Claim
57 words
A synthetic resinous composition comprising: a. from 50 to 90 percent by weight of poly(butyleneterephthalate characterized by the repeating structural formula: ##STR4## said poly(butyleneterephthalate) having an intrinsic viscosity of 0.6 to 1.5; and, b. an inorganic filler consisting essentially of 10 to 50 percent by weight novaculite having an average particle size of less than 5 microns.
Claim 10
Dependent Claim
17 words
The composition of claim 7 wherein said novaculite has a particle size of less than 10 microns.
Claim 11
Dependent Claim
16 words
The composition of claim 7 wherein said poly(butyleneterephthalate) has an intrinsic viscosity of 0.7 to 1.3.
Claim 12
Dependent Claim
29 words
The composition of claim 7 wherein said novaculite is present from 20 to 50 percent by weight and said poly(butyleneterephthalate) is present from 50 to 80 percent by weight.
Claim 13
Dependent Claim
17 words
The composition of claim 7 including up to 2 percent by weight of a silane coupling agent.
Claim 14
Dependent Claim
11 words
The composition of claim 11 wherein said coupling agent is gamma-aminopropyltrialkoxysilane.
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) | 1980-04-18 | 1980-10-18 | 1981-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-18 | 1984-10-18 | 1985-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-18 | 1988-10-18 | 1989-04-19 | $7700.00 | Window Closed / Lapsed |