Acrylic material
AssigneeLucite International UK Limited
InventorsPaul Eustace, Neil Andrew McCathy, Nicholas John Marston
Life of this patent
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Abstract
An acrylic material which is flame retardant comprises 4.9 to 94.9% by wt of an acrylic composition, 5-95% by wt of a halogen-containing polymer, especially PVC, and 0.1-25% by wt of an inorganic composition comprising at least one of an oxide, hydroxide, carbonate, borate, stearate, chloride or bromide, zinc, magnesium, molybdenum, antimony, aluminum, tin, copper, manganese, cobalt or iron.
Claims26
An acrylic material which comprises:
- a) 4.9 to 94.9% by wt of an acrylic composition;
- b) 5 to 95% by wt of a halogen containing polymer which contains between 5 to 70% by wt of halogen;
- c) 0.1 to 25% by wt of an inorganic composition comprising at least one of an oxide, hydroxide, carbonate, borate, stearate, chloride or bromide of zinc, magnesium, molybdenum, antimony, aluminium, tin, copper, manganese, cobalt or iron.
A method of manufacturing an acrylic material comprising:
- a) 4.9 to 94.9% by wt of an acrylic composition;
- b) 5 to 95% by wt of, a halogen containing polymer which contains between 5 to 70% by wt of halogen;
- c) 0.1 to 25% by wt of an inorganic composition comprising at least one of an oxide, hydroxide, carbonate, borate, stearate, chloride or bromide of zinc, magnesium, molybdenum, antimony, aluminium, tin, copper, manganese, cobalt or iron which method comprises melt blending said acrylic composition, said halogen containing polymer and said inorganic composition.
An invention according to any preceding claim, wherein said acrylic material comprises 24.9 to 94.9% by wt of said acrylic composition.
An invention according to any preceding claim, wherein said acrylic composition is a homo or copolymer of at least one C1-C6alkyl(C0-C10alk)acrylate.
An invention according to any preceding claim, wherein said acrylic composition comprises a copolymer made by polymerising a monomer mixture comprising 50-90 wt % of an alkyl methacrylate and 1-50 wt % of an alkyl acrylate.
An invention according to any preceding claim, wherein said acrylic composition comprises 20-60 wt % of a rubbery copolymer.
An invention according to any preceding claim, wherein said halogen-containing polymer is a polymer or copolymer of vinyl chloride or vinylidene chloride.
An invention according to any preceding claim, wherein said halogen-containing polymer includes at least 10% by wt of halogen.
An invention according to any preceding claim, wherein said halogen-containing polymer includes no halogen other than chlorine.
An invention according to any preceding claim, which includes at least 10% by wt and 75% weight or less of said halogen-containing polymer.
An invention according to any preceding claim, wherein said acrylic material includes at least 30% by wt and 90% by weight or less of said acrylic composition.
An invention according to any preceding claim, wherein said inorganic composition includes an anion selected from an oxide, borate, hydroxide or carbonate.
An invention according to any preceding claim, wherein said inorganic composition includes a cation selected from antimony, tin, zinc, magnesium and aluminium.
An invention according to any preceding claim, wherein said inorganic composition comprises at least one of a borate, oxide or hydroxide of aluminium, zinc, iron, magnesium or tin.
An invention according to any preceding claim, wherein said inorganic composition comprises an oxide of antimony and magnesium hydroxide.
An invention according to any preceding claim, wherein said inorganic composition includes magnesium hydroxide.
An invention according to any preceding claim, which includes at least 0.5% by wt of said inorganic composition.
An invention according to any preceding claim, wherein the ratio of the weight of said acrylic composition to said halogen-containing polymer is at least 0.5 and is less than 10.
An invention according to any preceding claim, wherein the ratio of the weight of said acrylic composition to said inorganic composition is at least 8 and less than 30.
A flame retardant component for use in construction comprising an acrylic material according to and/or manufactured in a method according to any preceding claim.
Dependencies are inferred from the claim text.