US4373044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-proofed plastics moulding compounds
Assignee: DuPont de Nemours Deutschland GmbH
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Filing: 1980-11-19
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Granted: 1983-02-08
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Expires: 2000-11-19
Abstract
Abstract The invention relates to plastics moulding compounds which have been flame-proofed with organic chlorine- or bromine-containing compounds, said moulding compounds containing at least one aerosol selected from the group comprising the highly dispersed silicates, highly dispersed alumina, and highly dispersed titanium dioxide, and, optionally, a dibasic or tribasic oxyacid of phosphorus or an ester thereof. These moulding compounds have a reduced corrosive action on contact metals.
Inventors
- 👤 Lothar Buxbaum
- 👤 Franz Breitenfellner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:53
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
79 words
A thermoplastic polyester moulding compound, which has been flameproofed with one or more organic chlorine- or bromine-containing compounds, which comprises (a) a thermoplastic polyester, and (b) from 0.1 to 10%, by weight based on said moulding compound, of one or more aerosols selected from the group consisting of the highly dispersed silicates, highly dispersed alumina, and highly dispersed titanium dioxide incorporated in (a), and wherein the aerosol has an internal surface area of at least 50 m 2 /g.
Claim 2
Dependent Claim
79 words
A thermoplastic polyester moulding compound, which has been flameproofed with one or more organic chlorine- or bromine-containing compounds, which comprises (a) a thermoplastic polyester, and (b) from 0.1 to 10%, by weight based on said moulding compound, of one or more aerosols selected from the group consisting of the highly dispersed silicates, highly dispersed alumina, and highly dispersed titanium dioxide incorporated in (a), and wherein the aerosol has an internal surface area of at least 50 m 2 /g.
Claim 3
Dependent Claim
19 words
A moulding compound according to claim 1, in which there is incorporated 0.5 to 3%, by weight, of aerosol.
Claim 4
Dependent Claim
46 words
A moulding compound according to claim 1, wherein component (a) is a polyester which is the random copolyester derived from the diols, 1,4-butanediol (46.5 mol%) and 1,3-bis(2-hydroxyethyl)-4,5,6,7-tetrabromobenzimidazolone (3.5 mol %), and the diacid, terephthalic acid (50 mol%), all mol% values being based on the total copolyester.
Claim 5
Dependent Claim
98 words
A moulding compound according to claim 1 which additionally contains (c) from 0.1 to 5% by weight of an oxyacid of phosphorus or ester thereof of the formula ##STR2## wherein each of x and y is 0 or 1 and the sum of x+y is 1 or 2, and each of R 1 , R 2 and R 3 independently is hydrogen, alkyl of 1 to 10 carbon atoms, cycloalkyl of 5 to 7 carbon atoms, aryl of 6 to 12 carbon atoms, aralkyl of 7 to 12 carbon atoms or alkaralkyl of 8 to 12 carbon atoms.
Claim 6
Dependent Claim
25 words
A moulding compound according to claim 4, in which there is incorporated a highly dispersed aluminium silicate in combination with triphenyl phosphate or benzenephosphonic acid.
Claim 7
Independent Claim
91 words
A method of reducing the corrosive action on metals and metal alloys of a thermoplastic polyester moulding compound which has been flame-proofed with one or more organic chlorine- or bromine-containing compounds, which method comprises incorporating in said moulding compound at least one aerosol selected from the group consisting of the highly dispersed silicates, highly dispersed alumina, and highly dispersed titanium dioxide alone or in combination with a dibasic or tribasic oxyacid of phosphorus or ester thereof, wherein the aerosol has an internal surface area of at least 50 m 2 /g.
Claim 8
Independent Claim
91 words
A method of reducing the corrosive action on metals and metal alloys of a thermoplastic polyester moulding compound which has been flame-proofed with one or more organic chlorine- or bromine-containing compounds, which method comprises incorporating in said moulding compound at least one aerosol selected from the group consisting of the highly dispersed silicates, highly dispersed alumina, and highly dispersed titanium dioxide alone or in combination with a dibasic or tribasic oxyacid of phosphorus or ester thereof, wherein the aerosol has an internal surface area of at least 50 m 2 /g.
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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) | 1986-02-07 | 1986-08-09 | 1987-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-07 | 1990-08-09 | 1991-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-07 | 1994-08-09 | 1995-02-08 | $7700.00 | Window Closed / Lapsed |