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US 2010/0168283 A1Published application
Flame retardant resinous compositions and process
AssigneeSabic Innovative Plastics IP B.V.
InventorsSatish Gaggar, Cameron Youngstrom
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AssigneeSabic Innovative Plastics IP B.V.
InventorsSatish Gaggar, Cameron Youngstrom
Estimating the term…
Disclosed is a resinous, flame-retardant composition comprising (i) 40-66 wt. % alkenyl aromatic resin, (ii) 9-33 wt. % ammonium polyphosphate, (iii) 14-40 wt. % cellulosic material and (iv) an amount of between 0.1 parts per 100 parts resinous components (phr) and 10 phr of at least one metal stearate, wherein all weights are based on the total weight of the composition and wherein ammonium polyphosphate and cellulosic material are present in a weight % ratio effective to provide molded articles exhibiting at least V-1 flame rating as determined according to the UL-94 protocol. Processes to prepare the composition and articles comprising a composition of the invention are also disclosed.
A resinous, flame-retardant composition comprising (i) 40-66 wt. % alkenyl aromatic resin, (ii) 9-33 wt. % ammonium polyphosphate, (iii) 14-40 wt. % cellulosic material and (iv) an amount of between 0.1 parts per 100 parts resinous components (phr) and 10 phr of at least one metal stearate, wherein all weights are based on the total weight of the composition and wherein ammonium polyphosphate and cellulosic material are present in a weight % ratio effective to provide molded articles exhibiting at least V-1 flame rating as determined according to the UL-94 protocol.
A resinous, flame-retardant composition comprising (i) 40-66 wt. % alkenyl aromatic resin, (ii) 9-33 wt. % ammonium polyphosphate, (iii) 14-40 wt. % cellulosic material, (iv) an amount of between 0.1 parts per 100 parts resinous components (phr) and 10 phr of at least one metal stearate, and (v) at least one additive selected from the group consisting of lubricants, flow promoters, plasticizers, antistatic agents, mold release agents, impact modifiers, stabilizers, color stabilizers, heat stabilizers, light stabilizers, antioxidants, anti-drip agents, UV screeners, UV absorbers, adjunct flame retardants, rubbery additives, adjunct copolymers comprising structural units derived from maleic anhydride, acrylic acid or methacrylic acid, and mixtures thereof, wherein ammonium polyphosphate and cellulosic material are present in a weight % ratio in a range of 1:2 to 2:1 effective to provide molded articles exhibiting at least V-1 flame rating as determined according to the UL-94 protocol.
An extrusion process for preparing a resinous, flame-retardant composition comprising (i) 40-66 wt. % alkenyl aromatic resin, (ii) 9-33 wt. % ammonium polyphosphate (iii) 14-40 wt. % cellulosic material, (iv) an amount of between 0. 1 parts per 100 parts resinous components (phr) and 10 phr of at least one metal stearate, and (v) at least one additive selected from the group consisting of lubricants, flow promoters, plasticizers, antistatic agents, mold release agents, impact modifiers, stabilizers, color stabilizers, heat stabilizers, light stabilizers, antioxidants, anti-drip agents, UV screeners, UV absorbers, adjunct flame retardants, rubbery additives, adjunct copolymers comprising structural units derived from maleic anhydride, acrylic acid or methacrylic acid, and mixtures thereof, wherein ammonium polyphosphate and cellulosic material are present in a weight % ratio in a range of 1:2 to 2:1 effective to provide molded articles exhibiting at least V-1 flame rating as determined according to the UL-94 protocol, which process comprises the step of adding at least a portion of the ammonium polyphosphate to the extruder down-stream from the alkenyl aromatic resin and the cellulosic material.
Dependencies are inferred from the claim text.