Patent US3727142A successfully refreshed from Google Patents.
Patent DE484480C successfully refreshed from Google Patents.
Patent US3080591A successfully refreshed from Google Patents.
US4366279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant polycarbonate resin composition
Assignee: Idemitsu Kosan Co Ltd
•
Filing: 1981-08-19
•
Granted: 1982-12-28
•
Expires: 2001-08-19
Abstract
Abstract A flame retardant polycarbonate resin composition comprising a polycarbonate resin, a nuclear substituted benzoic acid containing at least one substituent selected from the group consisting of thiosalicylic acid and dihydroxy benzoic acid, and tetrabromobisphenol A or <IMAGE> .
Inventors
- 👤 Tatsuya Tomioka
- 👤 Norio Ogata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:55
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18; C08K5/04; C08K5/13; C08K5/36; C08K5/37
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
57 words
A flame retardant polycarbonate resin composition comprising a polycarbonate resin which is prepared by reacting a dihydric phenol and phosgene or dicarbonate, a nuclear substituted benzoic acid selected from the group consisting of thiosalicylic acid and dihydroxybenzoic acid and an organohalogen compound selected from the group consisting of tetrabromobisphenol A and a compound having the formula ##STR5##
Claim 2
Dependent Claim
57 words
A flame retardant polycarbonate resin composition comprising a polycarbonate resin which is prepared by reacting a dihydric phenol and phosgene or dicarbonate, a nuclear substituted benzoic acid selected from the group consisting of thiosalicylic acid and dihydroxybenzoic acid and an organohalogen compound selected from the group consisting of tetrabromobisphenol A and a compound having the formula ##STR5##
Claim 3
Dependent Claim
53 words
The composition of claim 1, containing said nuclear substituted benzoic acid in an amount from 0.1 to 15 parts by weight per 100 parts by weight of said polycarbonate resin, and said organohalogen compound in an amount from 0.1 to 40 parts by weight per 100 parts by weight of said polycarbonate resin.
Claim 4
Dependent Claim
14 words
The composition of claim 2, wherein said nuclear substituted benzoic acid is thiosalicylic acid.
Claim 5
Dependent Claim
14 words
The composition of claim 2, wherein said nuclear substituted benzoic acid is dihydroxybenzoic acid.
Claim 6
Dependent Claim
13 words
The composition of claim 2, wherein said nuclear organohalogen compound is tetrabromobisphenol A.
Claim 7
Dependent Claim
12 words
The composition of claim 3, wherein said organohalogen compound is tetrabromobisphenol A.
Claim 8
Dependent Claim
12 words
The composition of claim 4, wherein said organohalogen compound is tetrabromobisphenol A.
Claim 9
Dependent Claim
13 words
The composition of claim 1 or 2, wherein said organohalogen compound is ##STR6##
Claim 10
Dependent Claim
11 words
The composition of claim 3, wherein said organohalogen compound is ##STR7##
Claim 11
Dependent Claim
11 words
The composition of claim 4, wherein said organohalogen compound is ##STR8##
Claim 12
Dependent Claim
39 words
The composition of any one of claims 1, 6, 7, 9 or 10 containing said nuclear substituted benzoic acid in an amount from 0.5 to 5 parts and said organohalogen compound in an amount from 0.5 to 20 parts.
Claim 13
Dependent Claim
31 words
The composition of claim 8 containing said nuclear substituted benzoic acid in an amount from 0.5 to 5 parts and said organohalogen compound in an amount from 0.5 to 20 parts.
Claim 14
Dependent Claim
17 words
The composition of claim 1 or 2, which further contains a metal salt of a polyphosphoric acid.
Claim 15
Dependent Claim
18 words
The composition of any one of claims 1, 6, 7, 9 or 10, which further contains sodium pyrophosphate.
Claim 16
Dependent Claim
10 words
The composition of claim 11, which further contains sodium pyrophosphate.
References Cited (Backward Citations)
US3201369A
Cited
US3322719A
Cited
US3635895A
Cited
US3668181A
Cited
US3951903A
Cited
US4097457A
Cited
US4263201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |