Patent US4991869A successfully refreshed from Google Patents.
Patent US3941752A successfully refreshed from Google Patents.
US3941752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retarding linear polyesters and shaped articles thereof
Assignee: Hoechst AG
•
Filing: 1974-09-13
•
Granted: 1976-03-02
•
Expires: 1994-09-13
Abstract
Abstract Flame-repellant linear polyesters are obtained by incorporating by condensation phosphorus-compounds having the formula O &uarr& HO-P-R-COOH, ¦ R1 wherein R and R1 are organic radicals which may also contain hereto atoms into the linear polyesters, preferably those from terephthalic acid and ethylene glycol. These polyesters are materials of which flame-repellent filaments, fibers, sheets, press-moulded and injection-moulded articles may be made. Products of the invention can be used whereever especially acute risks of ignition and fire exist.
Inventors
- 👤 Hans-Jerg Kleiner
- 👤 Manfred Finke
- 👤 Ulrich Bollert
- 👤 Walter Herwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:50
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/692; D; D01; D01F; D01F6/00; D01F6/78; D01F6/84; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6571; C07F9/657163; C07F9/657172; C08G63/6924; C08G63/6926; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S57/00; Y10S57/904
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
158 words
A linear polyester which is the polycondensation product of a dicarboxylic acid, a diol and a flame-retarding carboxy-phosphinic acid monomer, said monomer being used in an amount of from 3 to 20 mol percent, based on the total amount of dicarboxylic acid and monomer, said monomer being a source of structural units in said polyester of the formula ##EQU10## wherein R is saturated, open-chain or cyclic alkylene, arylene or aralkylene having one to 15 carbon atoms, and may contain one or more hetero atoms selected from F, Cl, Br, O and S, and R 1 is alkyl having up to six carbon atoms, aryl, or aralkyl and may contain one or more hetero atoms selected from F, Cl, Br, O and S, provided that in the R and R 1 groups the O, if present, is the oxygen of an ether group, and the S, if present, is the sulfur of a thioether, sulfoxide, sulfone or sulfonate group.
Claim 2
Dependent Claim
158 words
A linear polyester which is the polycondensation product of a dicarboxylic acid, a diol and a flame-retarding carboxy-phosphinic acid monomer, said monomer being used in an amount of from 3 to 20 mol percent, based on the total amount of dicarboxylic acid and monomer, said monomer being a source of structural units in said polyester of the formula ##EQU10## wherein R is saturated, open-chain or cyclic alkylene, arylene or aralkylene having one to 15 carbon atoms, and may contain one or more hetero atoms selected from F, Cl, Br, O and S, and R 1 is alkyl having up to six carbon atoms, aryl, or aralkyl and may contain one or more hetero atoms selected from F, Cl, Br, O and S, provided that in the R and R 1 groups the O, if present, is the oxygen of an ether group, and the S, if present, is the sulfur of a thioether, sulfoxide, sulfone or sulfonate group.
Claim 3
Dependent Claim
33 words
A linear polyester according to claim 1 wherein R is --CH 2 --CH 2 -- or --C 6 H 4 -and R 1 is CH 3 -- or C 6 H 5 --.
Claim 4
Dependent Claim
21 words
A linear polyester according to claim 1 wherein the radical R or R 1 contains a hetero atom O or S.
Claim 5
Dependent Claim
55 words
A linear polyester according to claim 1 wherein the units derived from dicarboxylic acid are essentially terephthalic acid units and the units derived from the diol are essentially units of a diol of the formula Ho (ch 2 ) n OH wherein n is 2 to 10, or the diol units are derived from 1,4-cyclohexane-dimethanol.
Claim 6
Dependent Claim
30 words
A linear polyester according to claim 1 wherein the units derived from dicarboxylic acid are essentially terephthalic acid units and the units derived from diol are essentially ethylene glycol units.
Claim 7
Independent Claim
159 words
A method of making a linear polyester which comprises polycondensing a dicarboxylic acid or a lower alkyl ester thereof with a diol in the presence of a flame-retarding phosphorus containing monomer of the general formula ##EQU11## or a lower alkyl ester or cyclic anhydride of said monomer in an amount of about 3 to 20 mole percent of the total acid components wherein the symbol R of said formula is saturated, open-chain or cyclic alkylene having one to 15 carbon atoms, arylene or aralkylene, and R 1 of the formula is alkyl having up to 6 carbon atoms, aryl or aralkyl, and wherein R and R 1 may further contain one or more hetero atoms selected from F, Cl, Br, O and S, provided that in the R and R 1 groups the O, if present, is the oxygen of an ether group, and the S, if present, is the sulfur of a thioether, sulfoxide, sulfone or sulfonate group.
Claim 8
Independent Claim
159 words
A method of making a linear polyester which comprises polycondensing a dicarboxylic acid or a lower alkyl ester thereof with a diol in the presence of a flame-retarding phosphorus containing monomer of the general formula ##EQU11## or a lower alkyl ester or cyclic anhydride of said monomer in an amount of about 3 to 20 mole percent of the total acid components wherein the symbol R of said formula is saturated, open-chain or cyclic alkylene having one to 15 carbon atoms, arylene or aralkylene, and R 1 of the formula is alkyl having up to 6 carbon atoms, aryl or aralkyl, and wherein R and R 1 may further contain one or more hetero atoms selected from F, Cl, Br, O and S, provided that in the R and R 1 groups the O, if present, is the oxygen of an ether group, and the S, if present, is the sulfur of a thioether, sulfoxide, sulfone or sulfonate group.
Claim 9
Dependent Claim
19 words
A process according to claim 6 wherein the dicarboxylic acid is terephthalic acid and the diol is ethylene glycol.
Claim 10
Dependent Claim
14 words
Shaped articles made by molding or extrusion of the linear polyester of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |