Patent US4036811A successfully refreshed from Google Patents.
US4036811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retarding polyamide molding compositions
Assignee: Hoechst AG
•
Filing: 1975-10-06
•
Granted: 1977-07-19
•
Expires: 1995-10-06
Abstract
Abstract There are disclosed novel flame retarding polyamide molding compositions containing, as the flameproofing agents, an amount of from 6 to 40, preferably 8 to 30 weight % of an alkali metal or a group II or III metal salt of a phosphinic or diphosphinic acid. The flameproofing agents are thermostable and do not adversely affect the polyamides during preparation and processing.
Inventors
- 👤 Siegfried Noetzel
- 👤 Walter Herwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:50
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5313
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
128 words
A polyamide molding composition consisting essentially of a polyamide and a flameproofing amount of a flame-proofing agent which is a salt of a phosphinic acid of the formula ##STR5## or a diphosphinic acid of the formula ##STR6## wherein Me is selected from alkali metals and metals of the second and third groups of the Periodic System, n indicates the valency of the metal Me, R is selected from saturated linear, branched and cyclic alkyl radicals having from 1 to 16 carbon atoms, aryl and aralkyl radicals having from 6 to 16 carbon atoms and mixtures thereof, and R 1 is selected from saturated linear, branched and cyclic alkylene; arylalkylene; arylene, arylenealkylene and arene-bisalkylene radicals having from 1 to 6 carbon atoms in the alkylene radical and mixtures thereof.
Claim 2
Dependent Claim
128 words
A polyamide molding composition consisting essentially of a polyamide and a flameproofing amount of a flame-proofing agent which is a salt of a phosphinic acid of the formula ##STR5## or a diphosphinic acid of the formula ##STR6## wherein Me is selected from alkali metals and metals of the second and third groups of the Periodic System, n indicates the valency of the metal Me, R is selected from saturated linear, branched and cyclic alkyl radicals having from 1 to 16 carbon atoms, aryl and aralkyl radicals having from 6 to 16 carbon atoms and mixtures thereof, and R 1 is selected from saturated linear, branched and cyclic alkylene; arylalkylene; arylene, arylenealkylene and arene-bisalkylene radicals having from 1 to 6 carbon atoms in the alkylene radical and mixtures thereof.
Claim 3
Dependent Claim
37 words
A polyamide molding composition as claimed in claim 1 containing a phosphinic acid salt of formula I or formula II in an amount of from 6 to 40 weight % based on the weight of the polymer.
Claim 4
Dependent Claim
39 words
A polyamide molding composition as claimed in claim 1 wherein the polyamide is an amorphous polyamide derived from a polyamine selected from 1,3- or 1,4-bis(aminomethyl)cyclohexane, 2,5- or 2,6-bis(aminomethyl)-bicyclo[2,2,1]-heptane, dimethyl-bis(4-aminocyclohexyl)-methane, 2,2,4- and 2,4,4-trimethylhexamethylene-diamine and xylylene-diamine as the main diamine component.
Claim 5
Dependent Claim
36 words
A molding composition according to claim 1 wherein R is a linear, branched or cyclic alkyl radical of 1 to 6 carbon atoms and the alkylene radical of R 1 has 2 to 4 carbon atoms.
Claim 6
Dependent Claim
18 words
A molding composition according to claim 1 containing from 8% to 30% by weight of the flameproofing agent.
Claim 7
Dependent Claim
122 words
A polyamide molding composition consisting essentially of a polyamide and a flameproofing amount of a flame-proofing agent which is a salt of a phosphinic acid of the formula ##STR7## or a diphosphinic acid of the formula ##STR8## wherein Me is a metal of the second group of the Periodic System, n indicates the valency of the metal Me, R is selected from saturated linear, branched and cyclic alkyl radicals having from 1 to 16 carbon atoms, aryl and aralkyl radicals having from 6 to 16 carbon atoms and mixtures thereof, and R 1 is selected from saturated linear, branched and cyclic alkylene; arylalkylene; arylene, arylenealkylene and arenebisalkylene radicals having from 1 to 6 carbon atoms in the alkylene radical and mixtures thereof.
Claim 8
Dependent Claim
122 words
A polyamide molding composition consisting essentially of a polyamide and a flameproofing amount of a flame-proofing agent which is a salt of a phosphinic acid of the formula ##STR7## or a diphosphinic acid of the formula ##STR8## wherein Me is a metal of the second group of the Periodic System, n indicates the valency of the metal Me, R is selected from saturated linear, branched and cyclic alkyl radicals having from 1 to 16 carbon atoms, aryl and aralkyl radicals having from 6 to 16 carbon atoms and mixtures thereof, and R 1 is selected from saturated linear, branched and cyclic alkylene; arylalkylene; arylene, arylenealkylene and arenebisalkylene radicals having from 1 to 6 carbon atoms in the alkylene radical and mixtures thereof.
Claim 9
Dependent Claim
12 words
A polyamide molding composition according to claim 6 wherein Me is zinc.
References Cited (Backward Citations)
US2981715A
Cited
US3471552A
Cited
US3454412A
Cited
US3582510A
Cited
US3786114A
Cited
US3894986A
Cited
US3900444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |