US4861515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester composition
Assignee: Polyplastics Co Ltd
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Filing: 1987-12-07
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Granted: 1989-08-29
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Expires: 2007-12-07
Abstract
Abstract A polyester composition which comprises a polyester being processable in the melt state and being capable of forming the anisotropic phase in the melt state and an inorganic filler having been surface treated with an epoxysilane compound.
Inventors
- 👤 Tsuyoshi Minamisawa
- 👤 Katsunori Endo
- 👤 Toshio Kanoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:35
CPC Classifications
C; C08; C08K; C08K9/00; C08K9/04; C08K9/06; C08L; C08L67/00; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3804; C09K19/3809; C09K19/52; C09K2019/521; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/0373
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
51 words
A polyester composition which comprises 30 to 99.5 percent by weight of a polyester being processable in the melt state and being capable of forming the anisotropic phase in the melt state and 0.5 to 70 percent by weight of an inorganic filler having been surface treated with an epoxysilane compound.
Claim 2
Dependent Claim
51 words
A polyester composition which comprises 30 to 99.5 percent by weight of a polyester being processable in the melt state and being capable of forming the anisotropic phase in the melt state and 0.5 to 70 percent by weight of an inorganic filler having been surface treated with an epoxysilane compound.
Claim 3
Dependent Claim
22 words
The polyester composition as claimed in claim 1, in which said inorganic filler is in the form of particles, flakes or fibers.
Claim 4
Dependent Claim
21 words
The polyester composition as claimed in claim 1, in which said inorganic filler is potassium titanate, glass flakes, talc or mica.
Claim 5
Dependent Claim
68 words
The polyester composition as claimed in claim 1, in which said inorganic filler is glass fiber, carbon fiber, metallic fiber, ceramic fiber, boron fiber, potassium titanate fiber, asbestos, calcium carbonate, silicate, alumina, silica, aluminum hydroxide, talc, clay, mica, glass flake, powdery glass, glass beads, quartz powder, silica sand, wollastonite, powdery metal, carbon black, barium sulfate, plaster of Paris, silicon carbide, Chinese white, boron nitrite, silicon nitride or whisker.
Claim 6
Dependent Claim
42 words
The polyester composition as claimed in claim 1, in which said epoxysilane compound is represented by the formula: wherein n is an integer of 2 or 3, R is --CH 3 or --C 2 H 5 and X is an epoxy group.
Claim 7
Dependent Claim
14 words
The polyester composition as claimed in claim 1, in which said epoxysilane is γ-glycidoxypropyltrimethoxysilane.
Claim 8
Dependent Claim
14 words
The polyester composition as claimed in claim 1, in which said epoxysilane is β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane.
Claim 9
Dependent Claim
50 words
The polyester composition as claimed in claim 1, wherein the surface treatment of the inorganic filler comprises preparing a dilute aqueous solution of an epoxysilane compound, immersing a filler in said solution and separating and drying the filler, forming the inorganic filler having been surface treated with an epoxysilane compound.
Claim 10
Dependent Claim
21 words
The polyester composition as claimed in claim 1, wherein the percent weight of the inorganic filler is 5 to 50 percent.
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) | 1992-08-28 | 1993-02-27 | 1993-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-28 | 1997-02-27 | 1997-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-28 | 2001-02-27 | 2001-08-29 | $7700.00 | Window Closed / Lapsed |