US4010104A
Expired / Lapsed
US
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Solutions of new complex antimony compounds
Assignee: Bayer AG
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Filing: 1975-05-08
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Granted: 1977-03-01
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Expires: 1995-05-08
Abstract
Abstract The invention relates to solutions of complex antimony compounds substantially insoluble in water which are produced by reacting antimony oxides with α-hydroxy carboxylic acids and further reaction with monoisocyanates as well as a process for the production of these solutions. The solutions according to the invention may be added to solutions of acrylonitrile polymers and copolymers and they improve the non-inflammability of shaped articles produced thereof.
Inventors
- 👤 Eduard Radlmann
- 👤 Heinz Schaffner
- 👤 Gunter Lorenz
- 👤 Gunther Nischk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:09
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08J3/215; C07; C07F; C07F9/00; C07F9/90; C07F9/902; C08K; C08K5/00; C08K5/59; D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; C08J2333/00; C08J2333/18; C08J2333/20
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
33 words
A fire retardant solution in a polar organic solvent of a complex reaction product of an antimony oxide with an α-hydroxy carboxylic acid which reaction product has been further reacted with a monoisocyanate.
Claim 2
Dependent Claim
33 words
A fire retardant solution in a polar organic solvent of a complex reaction product of an antimony oxide with an α-hydroxy carboxylic acid which reaction product has been further reacted with a monoisocyanate.
Claim 3
Dependent Claim
28 words
The solution of claim 1, wherein said polar organic solvent is a member selected from the group consisting of dimethyl formamide, dimethyl acetamide, N-methyl pyrrolidone and dimethyl sulphoxide.
Claim 4
Dependent Claim
12 words
The solution of claim 1, wherein said antimony oxide is antimony trioxide.
Claim 5
Dependent Claim
26 words
The solution of claim 1, wherein said α-hydroxy carboxylic acid is a member selected from the group consisting of tartaric acid, malic acid and lactic acid.
Claim 6
Dependent Claim
85 words
The solution of claim 1, wherein said monoisocyanate is the compound corresponding to the general formula R--N=C=O, wherein R represents a linear or branched alkyl radical with from 1 to 20 carbon atoms, or the radical: ##STR5## in which R 1 , R 2 , R 3 , R 4 and R 5 , which may be identical or different, each represents a member selected from the group consisting of hydrogen, an alkyl radical with from 1 to 5 carbon atoms, fluorine, chlorine and bromine.
Claim 7
Dependent Claim
74 words
A process for the production of a solution in a polar organic solvent of a complex antimony compound substantially insoluble in water, which comprises reacting an antimony oxide with an excess of an α-hydroxy carboxylic acid in a polar organic solvent at a temperature of from 100° to 200 C to form a clear solution and converting the excess carboxyl groups with a monoisocyanate at temperatures below 100° C into the corresponding amide groups.
Claim 8
Dependent Claim
74 words
A process for the production of a solution in a polar organic solvent of a complex antimony compound substantially insoluble in water, which comprises reacting an antimony oxide with an excess of an α-hydroxy carboxylic acid in a polar organic solvent at a temperature of from 100° to 200 C to form a clear solution and converting the excess carboxyl groups with a monoisocyanate at temperatures below 100° C into the corresponding amide groups.
Claim 9
Dependent Claim
28 words
The process of claim 6, wherein said polar organic solvent is a member selected from the group consisting of dimethyl formamide, dimethyl acetamide, N-methyl pyrrolidone and dimethyl sulphoxide.
Claim 10
Dependent Claim
12 words
The process of claim 6, wherein said antimony oxide is antimony trioxide.
Claim 11
Dependent Claim
26 words
The process of claim 6, wherein said α-hydroxy carboxylic acid is a member selected from the group consisting of tartaric acid, malic acid and lactic acid.
Claim 12
Dependent Claim
85 words
The process of claim 6, wherein said monoisocyanate is a compound corresponding to the general formula R--N=C=O, wherein R is a linear or branched alkyl radical with from 1 to 20 carbon atoms, or the radical: ##STR6## in which R 1 , R 2 , R 3 , R 4 and R 5 , which may be identical or different, each represents a member selected from the group consisting of hydrogen, an alkyl radical with from 1 to 5 carbon atoms, fluorine, chlorine and bromine.
Claim 13
Dependent Claim
29 words
The process of claim 6, wherein said reaction of said antimony oxide with said α-hydroxy carboxylic acid is carried out at a temperature of from 100° to 180° C.
Claim 14
Dependent Claim
27 words
The process of claim 6, wherein said reaction of said carboxyl groups with said monoisocyanate is carried out at a temperature of from 40° to 80° C.
Claim 15
Dependent Claim
25 words
The process of claim 6, wherein said molar excess of said α-hydroxy carboxylic acid to antimony is in the range of from 2:1 to 4:1.
Claim 16
Dependent Claim
23 words
The use of a solution of claim 1 as a flame retardant additive to a spinning solution of an acrylonitrile polymer or copolymers.
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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) | 1980-02-29 | 1980-08-30 | 1981-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-29 | 1984-08-30 | 1985-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-29 | 1988-08-30 | 1989-03-01 | $7700.00 | Window Closed / Lapsed |