US4244859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic polyester composition
Assignee: Teijin Ltd
•
Filing: 1978-11-13
•
Granted: 1981-01-13
•
Expires: 1998-11-13
Abstract
Abstract A novel composition comprising 100 parts by weight of an aromatic polyester, 5 to 150 parts by weight of powdery feldspar and optionally 5 to 120 parts by weight of a plate-like inorganic filler such as glass flakes and/or 1 to 100 parts by weight of a rubbery elastomer such as acrylic rubber. Up to a half of the powdery feldspar may be replaced by another pulverulent inorganic filler such as talc. The composition is useful as engineering plastics because it gives molded articles having high impact strength and heat distortion temperatures and reduced warping.
Inventors
- 👤 Kiyoshi Sugie
- 👤 Shizuka Kurisu
- 👤 Shingo Emi
- 👤 Shizuo Azuma
- 👤 Toshiaki Harada
- 👤 Shoji Kawase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:32
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08K9/00; C08K9/04; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
46 words
A composition consisting essentially of 100 parts by weight of an aromatic polyester, 5 to 150 parts by weight of powdery feldspar up to a half of which may be replaced by another pulverulent inorganic filler, and 5 to 120 parts by weight of glass flakes.
Claim 2
Dependent Claim
46 words
A composition consisting essentially of 100 parts by weight of an aromatic polyester, 5 to 150 parts by weight of powdery feldspar up to a half of which may be replaced by another pulverulent inorganic filler, and 5 to 120 parts by weight of glass flakes.
Claim 3
Dependent Claim
14 words
The composition of claim 1 wherein the other pulverulent inorganic filler is talc powder.
Claim 4
Dependent Claim
57 words
A composition consisting essentially of 100 parts by weight of an aromatic polyester, 5 to 150 parts by weight of powdery feldspar up to a half of which may be replaced by another pulverulent inorganic filler, 5 to 120 parts by weight of glass flakes filler, and 1 to 100 parts by weight of a rubbery elastomer.
Claim 5
Dependent Claim
57 words
A composition consisting essentially of 100 parts by weight of an aromatic polyester, 5 to 150 parts by weight of powdery feldspar up to a half of which may be replaced by another pulverulent inorganic filler, 5 to 120 parts by weight of glass flakes filler, and 1 to 100 parts by weight of a rubbery elastomer.
Claim 6
Dependent Claim
14 words
The composition of claim 3 wherein the other pulverulent inorganic filler is talc powder.
Claim 7
Dependent Claim
57 words
The composition of claim 3 wherein the rubbery elastomer is an elastomer obtained by copolymerizing a vinyl monomer with an acrylic polymer containing at least 70% of an acrylic ester recurring unit with the alkyl group containing 1 to 13 carbon atoms, the content of the acrylic ester unit being 30 to 90% based on the elastomer.
Claim 8
Dependent Claim
21 words
The composition of claim 3 wherein the other pulverulent inorganic filler is talc powder, and the rubbery elastomer is a poly(ether.ester)elastomer.
References Cited (Backward Citations)
US3764456A
Cited
US3859246A
Cited
US4097446A
Cited
US3953394A
Cited
US3953394B1
Cited
US3931094A
Cited
US4022748A
Cited
US4064098A
Cited
US4011285A
Cited
US4096202A
Cited
US4096202B1
Cited
US4111893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-13 | 1984-07-14 | 1985-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-13 | 1988-07-14 | 1989-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-13 | 1992-07-14 | 1993-01-13 | $7700.00 | Window Closed / Lapsed |