US3697625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-retardant polyesters and thermosetting compositions based thereon
Assignee: Union Carbide Corp
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Filing: 1970-11-23
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Granted: 1972-10-10
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Expires: 1990-11-23
Abstract
Abstract This invention relates to brominated polyesters, based on diols and as co-reactants a brominated maleic acid, a brominated tetrahydrophthalic acid, anhydrides or brominated monomeric esters of the anhydrides thereof, which are substantially free of dibromosuccinate and dibromohexahydrophthalate groups, contain bromine end groups and possess excellent flame-retardant properties, excellent thermal stability, excellent resistivity to ultraviolet light and can be used as flame-retardant plasticizers and when containing unsaturated groups, derived from nonhalogenated unsaturated polycarboxylic acids, can be used in molding applications to form aesthetically attractive thermoset articles characterized by excellent chemical, physical and electrical properties.
Inventors
- 👤 Percy L Smith
- 👤 Lowell R Comstock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:44
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/682; C08G63/6824
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
39 words
Process as defined in claim 1 wherein the diol has the formula: wherein the sum of m + p is 4 to 10 inclusive and R1 and R2 are hydrogen or alkyl containing 1 to 10 carbon atoms inclusive.
Claim 2
Dependent Claim
19 words
Process as defined in claim 1 wherein ethylene glycol is present as a diol reactant in producing the polyester.
Claim 3
Dependent Claim
18 words
Process as defined in claim 1 wherein phthalic acid or anhydride thereof is present in the reaction mixture.
Claim 4
Dependent Claim
18 words
Process as defined in claim 1 wherein maleic acid or anhydride thereof is present in the reaction mixture.
Claim 5
Dependent Claim
49 words
A brominated polyester having an acid number less than about 100, having bromine end groups, containing at least about 2 percent by weight combined bromine, and being substantially free of dibromosuccinate and dibromohexahydrophthalate groups, said polyester being the condensation reaction product of a mixture as defined in claim 1.
Claim 6
Dependent Claim
19 words
A brominated polyester as defined in claim 6 containing about 2 to about 40 percent by weight combined bromine.
Claim 7
Dependent Claim
32 words
A brominated polyester as defined in claim 6 which is the condensation reaction product of a mixture containing at least a stoichiometric amount of a diol and isodibromosuccinic acid or anhydride thereof.
Claim 8
Dependent Claim
41 words
A brominated polyester as defined in claim 6 which is the condensation reaction product of a mixture containing at least a stoichiometric amount of a diol and a dibRomohexahydrophthalic acid or anhydride thereof having the formula: wherein x 0 or 1.
Claim 9
Dependent Claim
32 words
A brominated polyester as defined in claim 6 wherein the mixture contains at least a stoichiometric amount of a diol and a dibrominated monomeric ester of maleic acid anhydride and a diol.
Claim 10
Dependent Claim
33 words
A brominated polyester as defined in claim 6 wherein the mixture contains at least a stoichiometric amount of a diol and a dibrominated monomeric ester of a tetrahydrophthalic acid anhydride and a diol.
Claim 11
Dependent Claim
34 words
A brominated polyester as defined in claim 6 wherein the diol is present in the reaction mixture in an amount of about 1 percent to about 10 percent in excess of the stoichiometric amount.
Claim 12
Dependent Claim
41 words
A brominated polyester as defined in claim 6 wherein the diol has the formula: wherein the sum of m + p is 4 to 10 inclusive and R1 and R2 are hydrogen or alkyl containing 1 to 10 carbon atoms inclusive.
Claim 13
Dependent Claim
16 words
A brominated polyester as defined in claim 6 wherein ethylene glycol is present as a diol.
Claim 14
Dependent Claim
21 words
A brominated polyester as defined in claim 6 wherein there is present in the reaction mixture phthalic acid or anhydride thereof.
Claim 15
Dependent Claim
21 words
A brominated polyester as defined in claim 6 wherein there is present in the reaction mixture maleic acid or anhydride thereof.
Claim 16
Dependent Claim
28 words
A thermosetting composition comprising the polyester as defined in claim 16 and an ethylenically unsaturated monomer in an amount of about 10 to about 60 percent by weight.
Claim 17
Dependent Claim
15 words
A thermosetting composition as defined in claim 17 wherein the ethylenically unsaturated monomer is styrene.
Claim 18
Dependent Claim
11 words
A thermosetting composition as defined in claim 17 containing a peroxide.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |