Disclosed is a flame-retardant HIPS material and a preparation method thereof, comprising the following components: 90 parts to 67 parts of a HIPS resin; 8 parts to 15 parts of a brominated flame retardant; and 3 parts to 7 parts of an auxiliary flame retardant; wherein the auxiliary flame retardant is a 1,3,5-triazine compound. In the present invention, a synergistic compounding of the brominated flame retardant and the auxiliary flame retardant effectively reduces an amount of the brominated flame retardant, and a stable UL 94 (1.5 mm) V-0 flame-retardant class can be achieved. Compared with the existing brominated flame-retardant HIPS, the present invention has a low halogen content, low gas, and high cost performance ratio, which avoids excessive acid gas from forming air lines on the surface of parts, has a good appearance.

Disclosed is a flame-retardant HIPS material and a preparation method thereof, comprising the following components: 90 parts to 67 parts of a HIPS resin; 8 parts to 15 parts of a brominated flame retardant; and 3 parts to 7 parts of an auxiliary flame retardant; wherein the auxiliary flame retardant is a 1,3,5-triazine compound. In the present invention, a synergistic compounding of the brominated flame retardant and the auxiliary flame retardant effectively reduces an amount of the brominated flame retardant, and a stable UL 94 (1.5 mm) V-0 flame-retardant class can be achieved. Compared with the existing brominated flame-retardant HIPS, the present invention has a low halogen content, low gas, and high cost performance ratio, which avoids excessive acid gas from forming air lines on the surface of parts, has a good appearance.

A polyvinyl halide compound has thermal conductivity and includes polyvinyl halide resin, natural or synthetic graphite of flake or spheroid form, and at least 0.5 weight percent of epoxidized vegetable oil. Selection of types and amounts of graphite and epoxidized vegetable oil provide thermal conductivity while other desirable properties of the compound are suitably maintained. The compound can be used for making any end use article that needs flame retardance and good thermal management and is especially useful as a thermally conductive material to replace die cast or extruded aluminum heat sinks in industrial applications, such as LED lighting fixtures.

A polyvinyl halide compound has thermal conductivity and includes polyvinyl halide resin, natural or synthetic graphite of flake or spheroid form, and at least 0.5 weight percent of epoxidized vegetable oil. Selection of types and amounts of graphite and epoxidized vegetable oil provide thermal conductivity while other desirable properties of the compound are suitably maintained. The compound can be used for making any end use article that needs flame retardance and good thermal management and is especially useful as a thermally conductive material to replace die cast or extruded aluminum heat sinks in industrial applications, such as LED lighting fixtures.

A polymeric composition includes a diene elastomer; an azodicarboxy compound; and a reinforcing filler comprising silica. The composition is not foamed. A method for preparing a polymeric composition includes mixing in one or more steps: a diene elastomer; an azodicarboxy compound; and a reinforcing filler. The mixing temperature is less than 160° C. in mixing steps in which the azodicarboxy compound is present. In an embodiment, the mixing temperature is kept below the decomposition temperature of the azodicarboxy compound.

A polymeric composition includes a diene elastomer; an azodicarboxy compound; and a reinforcing filler comprising silica. The composition is not foamed. A method for preparing a polymeric composition includes mixing in one or more steps: a diene elastomer; an azodicarboxy compound; and a reinforcing filler. The mixing temperature is less than 160° C. in mixing steps in which the azodicarboxy compound is present. In an embodiment, the mixing temperature is kept below the decomposition temperature of the azodicarboxy compound.

The present invention relates to a UV curable silicone composition comprising at least one organopolysiloxane having at least two alkenyl groups per molecule; at least one mercapto functional organic compound having at least two thiol groups per molecule; at least one photopolymerization initiator; and at least one polymerization inhibitor comprising at least one alkoxylated polyol derived (meth)acrylate or at least one quinone derivative compound, and/or at least one antioxidant, wherein the composition comprises the photopolymerization initiator selected from intramolecular hydrogen abstraction type photopolymerization initiators, or the composition comprises the polymerization inhibitor.

The present invention relates to a UV curable silicone composition comprising at least one organopolysiloxane having at least two alkenyl groups per molecule; at least one mercapto functional organic compound having at least two thiol groups per molecule; at least one photopolymerization initiator; and at least one polymerization inhibitor comprising at least one alkoxylated polyol derived (meth)acrylate or at least one quinone derivative compound, and/or at least one antioxidant, wherein the composition comprises the photopolymerization initiator selected from intramolecular hydrogen abstraction type photopolymerization initiators, or the composition comprises the polymerization inhibitor.

A polyvinyl chloride (PVC) foamed ceiling panel and a fabrication method thereof are disclosed. The PVC foamed ceiling panel is made of a PVC resin powder, a filler, a foaming regulator, a composite foaming agent, a calcium-zinc stabilizer, a lubricant, a pigment, a weather resistance modifier, a smoke suppressant, and a flame retardant. The PVC foamed ceiling panel has the advantages of heat resistance, matting, smoke suppression, flame retardancy, environmental friendliness, light weight, small thickness, safety, long-term action, long service life, wide use range, and the like, and can be used for suspended ceilings in residential buildings, office buildings, exhibition halls, conference halls, and the like and for various decorations. The fabrication method of the PVC foamed ceiling panel has the advantages of low cost, high performance, scientific rationality, and simple and easy operation.

A polyvinyl chloride (PVC) foamed ceiling panel and a fabrication method thereof are disclosed. The PVC foamed ceiling panel is made of a PVC resin powder, a filler, a foaming regulator, a composite foaming agent, a calcium-zinc stabilizer, a lubricant, a pigment, a weather resistance modifier, a smoke suppressant, and a flame retardant. The PVC foamed ceiling panel has the advantages of heat resistance, matting, smoke suppression, flame retardancy, environmental friendliness, light weight, small thickness, safety, long-term action, long service life, wide use range, and the like, and can be used for suspended ceilings in residential buildings, office buildings, exhibition halls, conference halls, and the like and for various decorations. The fabrication method of the PVC foamed ceiling panel has the advantages of low cost, high performance, scientific rationality, and simple and easy operation.