The invention relates to flame-retardant flexible polyurethane foams with phosphazene and to methods for producing PUR flexible foams by reacting a component A containing: A1, an isocyanate-reactive component, A2, a propellant containing water, A3, optionally auxiliary agents and additives, and A4, a flame retardant, with B, an isocyanate component. The invention is characterized in that the flame retardant A4 contains a phosphazene according to the formula (I): [P.sub.mN.sub.mX.sub.k] (I), where X independently of one another represents O-aryl or NR-aryl, at least one aryl group is substituted, X can represent a bridge, R is selected from the group of H, C1-C4 alkyl, and aryl, and m represents a number from 1 to 5, particularly preferably 3 or 4, k depends on m and represents a number from 0 to 2m, and the phosphazene does not have any groups which are reactive towards isocyanates.

This invention relates to a process for preparing viscoelastic flexible polyurethane foam comprising reacting an isocyanate component with an isocyanate-reactive component that comprises a polyol blend having a hydroxyl number of 56 to 250 and an average functionality of greater than 2, and a hydroxyl-terminated prepolymer. The invention also relates to viscoelastic flexible polyurethane foams.

Provided is a flame-retardant foamable styrene resin composition having a high flame retardancy and thermal stability, and recyclable, with a small amount of a bromine-containing flame retardant added. A flame-retardant foamable styrene resin composition, containing (A) a styrene resin, (B) a bromine-containing organic compound, (C) zinc oxide, and (D) a foaming agent, in which an amount of (C) the zinc oxide added is less than 2 parts by weight per 100 parts by weight of (A) the styrene resin.

A polyurethane foam article comprises the reaction product of an isocyanate component and isocyanate-reactive composition in the presence of a blowing agent. The isocyanate component includes an isocyanate prepolymer comprising the reaction product of a first polyether polyol and a methylene diphenyl diisocyanate. The isocyanate-reactive composition comprises a second polyether polyol having secondary terminal hydroxyl groups and an amine-initiated catalytic polyether polyol having primary hydroxyl groups. A method of making the polyurethane foam article comprises the steps of reacting the first polyether polyol and methylene diphenyl diisocyanate to form the isocyanate prepolymer and reacting the isocyanate prepolymer with the isocyanate-reactive composition in the presence of the blowing agent to form the polyurethane foam article.

The present invention discloses a rubber composition, a processing method thereof, and a foamed rubber product produced by the rubber composition and a production method thereof. The rubber composition comprises a rubber matrix and essential components, wherein, based on 100 parts by weight of the rubber matrix, the rubber matrix comprises a branched polyethylene with a content represented as A, in which 0<A100 parts; and an EPM and an EPDM with a total content represented as B, in which 0B<100 parts, and the essential components comprises 0.5-10 parts of a crosslinking agent, and 1.5-25 parts of a foaming agent. The rubber composition is useful in the production of sponge seal strip, foamed rubber compound of high expansion ratio, shock absorbing foamed rubber sheet, light-colored high-strength foamed sheet, foam-solid composite seal strip, and solid cycle tires internally filled with foamed elastomer. The branched polyethylene replaces a part or all of the ethylene-propylene rubber in the foaming rubber composition, which can increase the melt strength, the foamability and particularly the pre-foamability of the rubber composition, and make the rubber product has a lower compression set.

The invention relates to the production of PMI foams, more particularly to their formulating ingredients, which lead to particular facility in adjusting the density at given foaming temperature.

Provided is a bead expanded molded article comprising a plurality of resin expanded particles that are fusion-bonded with each other, in which the resin expanded particles mainly include a resin having a glass transition temperature of 180 C. or more.

The present invention relates to modified high density polyethylene, foamable compositions and foam or foamed articles made therefrom. The invention also relates to processes to make the same.

A process for the production of functionalized particle foam mouldings based on a thermoplastic base material with a glass transition temperature of at least 100 C. involves functionalization of base particles.

A shape memory polymer foam comprising a reaction product of a reaction of an epoxide and a thiol monomer in the presence of an organobase is provided. In addition, a method of making the shape memory polymer foam is provided. The method includes reacting an epoxide with thiol monomers in the presence of an organobase to form the shape memory polymer foam.