Patent US4959481A successfully refreshed from Google Patents.
US4959481A
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Flame retardant compounds and thermoplastic compositions containing the same
Assignee: General Electric Co
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Filing: 1988-05-04
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Granted: 1990-09-25
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Expires: 2008-05-04
Abstract
Abstract Novel flame retardant agents comprise polyalkylene oxides or a derivative thereof and end-capped with brominated phthalimide groups, and have the general formulae ##STR1## R 1 is alkylene of from about 2 to about 6 carbon atoms; R 1 is alkyl of from about 1 to about 6 carbon atoms; n is from about 4 to about 40; n' is from about 3 to about 15; and n" is from about 1 to about 10. Thermoplastic compositions, for example, polyphenylene ether compositions, rendered flame retardant with the novel compounds have a high resistance to additive vaporization and surface liquid exudation as well as desirable high flow characteristics.
Inventors
- 👤 Robert J. Axelrod
- 👤 Donald B. G. Jaquiss
- 👤 John A. Tyrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:29
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/331; C08G65/332; C08G65/3324; C08G65/3326; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3415; C08K5/3417; C08L; C08L67/00; C08L69/00; C08L71/00; C08L71/02; C08L71/08; C08L71/10; C08L71/12; C08L71/123; C08L77/00; C08L2201/00; C08L2201/02; C08L81/00
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
74 words
A flame retardant compound comprising a polyalkylene oxide or derivative thereof end-capped with brominated phthalimide groups and being of the formulae ##STR8## R 1 is alkylene of from about 2 to about 6 carbon atoms, R 2 is alkyl of from about 1 to about 6 carbon atoms; n is from about 4 to about 40; and n' is from about 3 to about 15 and n" is from about 1 to about 10.
Claim 2
Dependent Claim
74 words
A flame retardant compound comprising a polyalkylene oxide or derivative thereof end-capped with brominated phthalimide groups and being of the formulae ##STR8## R 1 is alkylene of from about 2 to about 6 carbon atoms, R 2 is alkyl of from about 1 to about 6 carbon atoms; n is from about 4 to about 40; and n' is from about 3 to about 15 and n" is from about 1 to about 10.
Claim 3
Dependent Claim
17 words
The compound of claim 1 of formula (I) wherein n is from about 5 to about 33.
Claim 4
Dependent Claim
17 words
The compound of claim 1 of formula (II) wherein n' is from about 4 to about 8.
Claim 5
Dependent Claim
17 words
The compound of claim 1 of formula (III) wherein n" is from about 1.5 to about 2.5.
Claim 6
Dependent Claim
12 words
The compound of claim 1 wherein R 1 is ethylene or propylene.
Claim 7
Dependent Claim
12 words
The compound of claim 5 wherein R 1 is a ##STR9## group.
Claim 8
Dependent Claim
12 words
The compound of claim 6, wherein said compound is selected from ##STR10##
Claim 9
Dependent Claim
20 words
A flame retardant compound as described in claim 1 having a molecular weight of from about 400 to about 2,000.
Claim 10
Dependent Claim
19 words
A flame retardant compound as described in claim 1 having a melting point of less than about 200° C.
Claim 11
Dependent Claim
22 words
A flame retardant compound as described in claim 9 having a melting point of from about 80° C. to about 146° C.
Claim 12
Dependent Claim
20 words
A flame retardant compound as described in claim 1 having from about 5 to about 55% by weight of bromine.
Claim 13
Dependent Claim
22 words
A flame retardant compound as described in claim 11 having a bromine content of from about 22 to about 53% by weight.
Claim 14
Dependent Claim
12 words
The compound of claim 1 comprised of tetrabromophthalic anhydride and polyoxypropylene diamine.
Claim 15
Dependent Claim
15 words
The compound of claim 13 wherein the polyoxypropylene has a molecular weight of about 2,000.
Claim 16
Dependent Claim
16 words
The compound of claim 14 which has a bromine content of about 22 percent by weight.
Claim 17
Dependent Claim
16 words
The compound of claim 13 wherein the polyoxypropylene diamine has a molecular weight of about 400.
Claim 18
Dependent Claim
15 words
The compound of claim 16 which has a bromine content of about 50% by weight.
Claim 19
Dependent Claim
12 words
The compound of claim 1 comprised of tetrabromophthalic anhydride and polyoxyethylene diamine.
Claim 20
Dependent Claim
15 words
The compound of claim 18 wherein the polyoxyethylene has a molecular weight of about 900.
Claim 21
Dependent Claim
15 words
The compound of claim 19 which has a bromine content of about 35% by weight.
Claim 22
Dependent Claim
12 words
The compound of claim 1 comprised of tetrabromophthalic anhydride and di(aminopolyoxypropylene) urea.
Claim 23
Dependent Claim
16 words
The compound of claim 21 wherein the di(aminopolyoxypropylene) urea has a molecular weight of about 700.
Claim 24
Dependent Claim
15 words
The compound of claim 22 which has a bromine content of about 37% by weight.
Claim 25
Dependent Claim
12 words
The compound of claim 1 comprised of tetrabromophthalic anhydride and polyoxypropylene triamine.
Claim 26
Dependent Claim
15 words
The compound of claim 24 in which the polyoxypropylene triamine has the general formula ##STR11##
Claim 27
Dependent Claim
16 words
The compound of claim 25 wherein the polyoxypropylene triamine has a molecular weight of about 440.
Claim 28
Dependent Claim
15 words
The compound of claim 26 which has a bromine content of about 53% by weight.
Claim 29
Dependent Claim
10 words
The compound of claim 25 wherein r+s+t is about 5.3.
Claim 30
Dependent Claim
17 words
The compound of claim 1 which has a melting point temperature of less than about 200° C.
Claim 31
Dependent Claim
17 words
The compound of claim 1 which has a melting point temperature of less than about 146° C.
Claim 32
Dependent Claim
17 words
The compound of claim 1 which has a melting point temperature of less than about 125° C.
Claim 33
Dependent Claim
19 words
The compound of claim 1 which has a melting point temperature from about 80° C. to about 200° C.
Claim 34
Dependent Claim
15 words
The compound of claim 1 which has a bromine content of less than about 55%.
Claim 35
Dependent Claim
15 words
The compound of claim 1 which has a bromine content of less than about 37%.
Claim 36
Dependent Claim
15 words
The compound of claim 1 which has a bromine content of less than about 35%.
Claim 37
Dependent Claim
15 words
The compound of claim 1 which has a bromine content of less than about 22%.
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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) | 1993-09-24 | 1994-03-26 | 1994-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-24 | 1998-03-26 | 1998-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-24 | 2002-03-26 | 2002-09-25 | $7700.00 | Window Closed / Lapsed |