Patent EP0191283A2 successfully refreshed from Google Patents.
Patent US4900784A successfully refreshed from Google Patents.
US4900784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
PBT-PC-rubber-brominated FR high tracking resistance+VO
Assignee: SABIC Global Technologies BV
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Filing: 1988-11-10
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Granted: 1990-02-13
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Expires: 2008-11-10
Abstract
Abstract The invention relates to polymer mixtures having a comparative tracking index of more than 400 volts (KC) and a VO-value according to UL-94. The polymer mixtures according to the invention comprise a polybutylene teraphthalate, an aromatic polycarbonate, a brominated polystyrene, and an agent to improve the impact strength.
Inventors
- 👤 Farshid M. H. Tabankia
- 👤 Jan De Boer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:36
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
45 words
A polymer mixture which consists of the following constituents: a. a polybutylene terephthalate; b. a brominated polystyrene as a flame retardant, characterized in that the polymer mixture moreover consists of the following constituents; c. an aromatic polycarbonate; and d. agent to improve the impact strength.
Claim 2
Dependent Claim
45 words
A polymer mixture which consists of the following constituents: a. a polybutylene terephthalate; b. a brominated polystyrene as a flame retardant, characterized in that the polymer mixture moreover consists of the following constituents; c. an aromatic polycarbonate; and d. agent to improve the impact strength.
Claim 3
Dependent Claim
66 words
A polymer mixture as claimed in claim 1, wherein the polymer mixture consisting of a. 60-85% by weight of polybutylene terephthalate, b. 5-20% by weight of brominated polystyrene, c. 5-25% by weight of aromatic polycarbonate, and d. 5-15% by weight of the agent to improve the impact strength, the weight percentages being calculated with respect to the sum of the constituents a, b, c, and d.
Claim 4
Dependent Claim
35 words
A polymer mixture as claimed in claim 1, wherein constituent a. is a polymer or a copolymer which is built up for more than 70 mol % from units derived from terephthalic acid and butane-1,4-diol.
Claim 5
Dependent Claim
24 words
A polymer mixture as claimed in claim 1, wherein the polymer mixture consists of a metal compound which cooperates synergistically with the brominated polystyrene.
Claim 6
Dependent Claim
35 words
A polymer mixture as claimed in claim 1, wherein agent c. is a core-shell copolymer prepared in various stages and built up from a rubber-like core on which one or more shells have been grafted.
Claim 7
Dependent Claim
46 words
A polymer mixture as claimed in claim 1, wherein, in addition to the constituents mentioned hereinbefore sub a, b, c, and d, the polymer mixture consists of 1-100 parts by weight of additives per 100 parts by weight of a. plus b. plus c. plus d.
Claim 8
Dependent Claim
11 words
Articles formed from the polymer mixture as claimed in 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) | 1993-02-12 | 1993-08-14 | 1994-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-12 | 1997-08-14 | 1998-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-12 | 2001-08-14 | 2002-02-13 | $7700.00 | Window Closed / Lapsed |