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US 2016/0257704 A1Published application
Flame-retardant cellulose ester preparations
AssigneeLANXESS Deutschland GmbH
InventorsHeiko TEBBE, Jan-Gerd HANSEL, Otto MAUERER
Life of this patent
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Abstract
Flame retardant cellulose ester preparations include phosphorus-containing propionic acid derivatives as flame-retardant plasticizers.
Claims20
A cellulose ester preparation comprising:
- a) one or more cellulose esters, and
- b) one or more phosphorus-containing propionic acid derivatives of formula (I)
- where
- X represents oxygen or sulphur,
- R represents hydrogen or methyl,
- A represents oxygen or NH,
- Z represents an n-valent saturated, straight-chain or branched, aliphatic hydrocarbyl moiety of 1-20 carbon atoms which is optionally interrupted by one or more heteroatoms from the series oxygen and sulphur, or an n-valent 5- or 6-membered heterocyclic ring which contains one to three nitrogen atoms as heteroatoms and is optionally substituted by one or more identical or different substituents, and n represents an integer from 1 to 4.
4 more elements
A phosphorus-containing propionic acid derivative of formula (I)
- wherein:
- X represents oxygen or sulphur,
- R represents hydrogen or methyl.
- A represents oxygen or NH,
- Z represents an n-valent saturated, straight-chain or branched, aliphatic hydrocarbyl moiety of 1-20 carbon atoms which is optionally interrupted by one or more heteroatoms from the series oxygen and sulphur, or an n-valent 5- or 6-membered heterocyclic ring which contains one to three nitrogen atoms as heteroatorns and is optionally substituted by one or more identical or different substituents, and
- n represents an integer from 1 to 4.
3 more elements
A method of producing a flame retardant with plasticizing properties, the method comprising mixing a phosphorus-containing propionic acid derivative of formula (I) in a cellulose ester preparation, wherein formula (I) is
- where
- X represents oxygen or sulphur,
- R represents hydrogen or methyl,
- A represents oxygen or NH,
- Z represents an n-valent saturated, straight-chain or branched, aliphatic hydrocarbyl moiety of 1-20 carbon atoms which is optionally interrupted by one or more heteroatoms from the series oxygen and sulphur, or an n-valent 5- or 6-membered heterocyclic ring which contains one to three nitrogen atoms as heteroatoms and is optionally substituted by one or more identical or different substituents, and
- n represents an integer from 1 to 4.
3 more elements
Dependencies are inferred from the claim text.