An article with at least two extruded thermoplastic polymer foam pieces that fit together to form a length of foam having a generally annular cross section, each piece having a concave surface such that the concave surfaces adjoin to form an internal edge defining a hole within the generally annular cross section; wherein each piece has a density less than 36 kilograms per cubic meter, a product of density times average cell size that is less than 17 millimeters*kilogram per cubic meter, and a thermal conductivity of 35 milliwatts per meter*Kelvin or less.

The invention relates to a thermally insulated conduit pipe, comprising at least one medium pipe, at least one thermal insulation arranged around the medium pipe, and at least one outer jacket arranged around the thermal insulation, wherein the outer jacket possibly comprises a barrier made of plastic, and wherein the thermal insulation comprises a foam, the cell gas of which contains at least 10 vol% HFOs. Such conduit pipe has good insulating behavior, good environmental balance, and is easily producible.

The present invention relates to compositions for use in refrigeration, air-conditioning, and heat pump systems wherein the composition comprises a fluoroolefin and at least one other component. The compositions of the present invention are useful in processes for producing cooling or heat, as heat transfer fluids, foam blowing agents, aerosol propellants, and fire suppression and fire extinguishing agents.

Compositions for producing a rigid polyurethane foam are described, comprising at least one isocyanate component, a polyol component, optionally a catalyst which catalyzes the formation of a urethane or isocyanurate bond, wherein the composition has hydrocarbons having 3, 4 or 5 carbon atoms, hydrofluorocarbons, hydrofluoroolefins (HFO), hydrohaloolefins, oxygen-containing blowing agents and/or chlorohydrocarbons as blowing agent, and also comprises acrylate and/or methacrylate copolymers as foam stabilizers.

An expandable poly methyl methacrylate particle including a polymer, which is obtained by a process including polymerizing monomers including 100 parts by weight of an acrylic monomer and from 0.05 to 0.15 parts by weight of a polyfunctional monomer. The acrylic monomer includes 90% to 98% by weight of methyl methacrylate and 2% to 10% by weight of an C.sub.2-8 alkyl acrylate, relative to a total weight of the methyl methacrylate and the C.sub.2-8 alkyl acrylate.

Foamed polymeric compositions containing clay nucleating agents are described. The clays are preferably sepiolite, palygorskite/attapulgite, or combinations thereof. Also described are processes for forming the foamed compositions. The resulting products find particular application as insulation and packaging materials.

An azeotropic-like composition containing 2-chloro-1,3,3,3-tetrafluoropropene and 1-chloro-3,3,3-trifluoropropene is provided. The azeotropic-like composition according to the present invention is non-flammable, has little influence on the environment, and has substantially the same composition ratio in the liquid phase and the gas phase. By use of an azeotropic-like composition according to the present invention, a washing detergent, a solvent, a silicone solvent, a foaming agent, a coolant, a heating medium for a heat pump, and a high temperature working fluid that are non-flammable, have little influence on the environment, and have substantially the same composition ratio in a liquid phase and a gas phase thereof may be provided.

The present invention relates to blowing agent compositions of carbon dioxide and at least one hydrochlorofluoroolefin (HCFO). The HCFOs can include, but are not limited to, 1-chloro-3,3,3-trifluoropropene (HCFO-1233zd), 2-chloro-3,3,3-trifluoropropene (HCFO-1233xf) and mixtures thereof. The blowing agent compositions are useful in the production of low density insulating foams with improved k-factor made from thermoplastic resins The blowing agent compositions may also optionally include one or more hydrofluoroolefins (HFOs).

A rigid polyurethane foam formulation comprising a polyester polyol having a hydroxyl number of from 150 to 600 mg KOH/g and a functionality of at least 2, a blowing agent comprising water and an auxiliary blowing agent, a non-silicone organic surfactant, greater than 0.1% to less than 3.7% of a cyclic siloxane, by weight based on the total weight of the foam formulation, a catalyst, and optionally a flame retardant; and a polyisocyanate; such that the isocyanate index is in the range of from 100 to 500, a rigid polyurethane foam formed from the foam formulation; and a method of forming a rigid polyurethane foam.

This invention relates to the use blends comprising HFO-1336mzz-Z, methyl formate, and optionally, HFC-152a as blowing agents for thermoplastic polymers (e.g., polystyrene).