Patent US4098759A successfully refreshed from Google Patents.
US4098759A
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Bromine-containing cyclic phosphonic acid esters
Assignee: Hoechst AG
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Filing: 1976-01-27
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Granted: 1978-07-04
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Expires: 1996-01-27
Abstract
Abstract Bromine-containing phosphonic acid esters of the formula ##STR1## in which R represents a halogen-containing linear or branched aliphatic or cycloaliphatic hydrocarbon radical having from 1 to 8 carbon atoms and R' and R" are hydrogen, halogen or alkyl groups having from 1 to 4 carbon atoms which may be closed to form a ring and/or substituted by halogen, at least one substituent being a bromine atom, are suitable as flame retardants for plastic materials, especially polystyrene and styrene copolymers.
Inventors
- 👤 Siegfried Noetzel
- 👤 Horst Jastrow
- 👤 Edgar Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:27
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6571; C07F9/657163; C07F9/657181; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333; C08K5/5357
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
77 words
A flame resistant composition comprising a readily inflammable plastic material and a flame retardant amount of a bromine-containing phosphonic acid ester of the formula ##STR5## in which R is an aliphatic hydrocarbon radical of 1 to 8 carbon atoms and containing a member selected from the group consisting of chlorine and bromine and R' and R" are hydrogen, chlorine, bromine, or are joined to form a dibromocyclohexyl radical, and the ester contains at least one bromine atom.
Claim 2
Dependent Claim
77 words
A flame resistant composition comprising a readily inflammable plastic material and a flame retardant amount of a bromine-containing phosphonic acid ester of the formula ##STR5## in which R is an aliphatic hydrocarbon radical of 1 to 8 carbon atoms and containing a member selected from the group consisting of chlorine and bromine and R' and R" are hydrogen, chlorine, bromine, or are joined to form a dibromocyclohexyl radical, and the ester contains at least one bromine atom.
Claim 3
Dependent Claim
33 words
The composition of claim 1 wherein the plastic material is a member selected from the group consisting of polystyrene, a copolymer of styrene and acrylonitrile, and a copolymer of styrene, butadiene-1,3 and acrylonitrile.
Claim 4
Dependent Claim
14 words
The composition of claim 1 wherein the plastic material is a copolymer of styrene.
Claim 5
Dependent Claim
50 words
A flame resistant composition comprising a readily inflammable plastic material and a flame retardant amount of a bromine-containing phosphonic acid ester of the formula ##STR6## in which R' and R" represent a member selected from the group consisting of hydrogen, chlorine, bromine and R' and R" joined to form dibromo-cyclohexane.
Claim 6
Dependent Claim
50 words
A flame resistant composition comprising a readily inflammable plastic material and a flame retardant amount of a bromine-containing phosphonic acid ester of the formula ##STR6## in which R' and R" represent a member selected from the group consisting of hydrogen, chlorine, bromine and R' and R" joined to form dibromo-cyclohexane.
Claim 7
Dependent Claim
13 words
The composition of claim 4 wherein the plastic material comprises a thermoplastic material.
Claim 8
Dependent Claim
97 words
A flame resistant composition comprising a readily inflammable plastic material which comprises a member selected from the group consisting of polymers and copolymers of ethylene, propylene, acrylonitrile, acrylic acid esters, methacrylic acid esters and vinyl acetate, polystyrene, copolymers of styrene and acrylonitrile, and copolymers of styrene, butadiene-1,3 and acrylonitrile, and unsaturated polyester resins and polyurethane resins and a flame retardant amount of a bromine containing phosphonic acid ester of the formula ##STR7## in which R' and R" represent a member selected from the group consisting of hydrogen, chlorine, bromine and R' and R" joined to form dibromo-cyclohexane.
Claim 9
Dependent Claim
97 words
A flame resistant composition comprising a readily inflammable plastic material which comprises a member selected from the group consisting of polymers and copolymers of ethylene, propylene, acrylonitrile, acrylic acid esters, methacrylic acid esters and vinyl acetate, polystyrene, copolymers of styrene and acrylonitrile, and copolymers of styrene, butadiene-1,3 and acrylonitrile, and unsaturated polyester resins and polyurethane resins and a flame retardant amount of a bromine containing phosphonic acid ester of the formula ##STR7## in which R' and R" represent a member selected from the group consisting of hydrogen, chlorine, bromine and R' and R" joined to form dibromo-cyclohexane.
Claim 10
Dependent Claim
76 words
A flame resistant composition comprising a readily inflammable plastic material which comprises a member selected from the group consisting of polystyrene, a copolymer of styrene and acrylonitrile, and a copolymer of styrene, butadiene-1,3 and acrylonitrile and a flame retardant amount of a bromine containing phosphonic acid ester of the formula ##STR8## in which R' and R" represent a member selected from the group consisting of hydrogen, chlorine, bromine and R' and R" joined to form dibromo-cyclohexane.
Claim 11
Dependent Claim
76 words
A flame resistant composition comprising a readily inflammable plastic material which comprises a member selected from the group consisting of polystyrene, a copolymer of styrene and acrylonitrile, and a copolymer of styrene, butadiene-1,3 and acrylonitrile and a flame retardant amount of a bromine containing phosphonic acid ester of the formula ##STR8## in which R' and R" represent a member selected from the group consisting of hydrogen, chlorine, bromine and R' and R" joined to form dibromo-cyclohexane.
Claim 12
Dependent Claim
55 words
A flame resistant composition comprising a readily inflammable plastic material which is a polystyrene and a flame retardant amount of a bromine containing phosphonic acid ester of the formula ##STR9## in which R' and R" represent a member selected from the group consisting of hydrogen, chlorine, bromine and R' and R" joined to form dibromo-cyclohexane.
Claim 13
Dependent Claim
55 words
A flame resistant composition comprising a readily inflammable plastic material which is a polystyrene and a flame retardant amount of a bromine containing phosphonic acid ester of the formula ##STR9## in which R' and R" represent a member selected from the group consisting of hydrogen, chlorine, bromine and R' and R" joined to form dibromo-cyclohexane.
Claim 14
Dependent Claim
19 words
The composition of claim 4 wherein the bromine content comprises 0.3 to 20% by weight of said plastic material.
Claim 15
Dependent Claim
19 words
The composition of claim 4 wherein the bromine content comprises 0.8 to 10% by weight of said plastic material.
Claim 16
Dependent Claim
13 words
The flame resistant composition of claim 4 wherein R' and R" are bromine.
Claim 17
Dependent Claim
13 words
The flame resistant composition of claim 4 wherein R' and R" are chlorine.
Claim 18
Dependent Claim
13 words
The flame resistant composition of claim 4 wherein R' and R" are hydrogen.
Claim 19
Dependent Claim
16 words
The flame resistant composition of claim 4 wherein R' and R" are joined and form 3,4-dibromo-cyclohexane.
Claim 20
Dependent Claim
13 words
The composition of claim 4 wherein the plastic material contains an organic peroxide.
Claim 21
Dependent Claim
33 words
The composition of claim 15 wherein the plastic material contains an organic peroxide which is a member selected from the group consisting of di-tert, butyl peroxide, dibenzoyl peroxide, tert.butyl perbenzoate, and mixtures thereof.
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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) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |