The invention provides polyurethane and polyisocyanurate foams and methods for the preparation thereof. More particularly, the invention relates to closed-celled, polyurethane and polyisocyanurate foams and methods for their preparation. The foams are characterized by a fine uniform cell structure and little or no foam collapse. The foams are produced with a polyol premix composition which comprises a combination of a hydrohaloolefin blowing agent, a polyol, a silicone surfactant, and a non-amine catalyst used alone or in combination with an amine catalyst.

Various uses of monochlorotrifluoropropenes, in combination with one or more other components, including other fluoroalkenes, hydrocarbons; hydrofluorocarbons (HFCs), ethers, alcohols, aldehydes, ketones, methyl formate, formic acid, water, trans-1,2-dichloroethylene, carbon dioxide and combinations of any two or more of these, in a variety of applications, including as blowing agents, are disclosed.

Disclosed is a blowing agent composition comprising a hydrofluoroolefins (HFO) and a branched hydrocarbon, and a foamable polymer composition comprising the blowing agent composition. Also disclosed is a method of making a polymer foam utilizing a blowing agent composition comprising an HFO and a branched hydrocarbon.

A urethane resin composition having properties suitable for forming a building insulation layer without adding a foam stabilizer in a urethane resin composition having at least quasi-incombustibility. A urethane resin composition for forming a foam that constitutes a insulation material for a building includes a foam having at least quasi-incombustibility in a heat-release test complying with ISO-5660, the urethane resin composition containing at least a polyisocyanate compound, an ester polyol compound, a trimerization catalyst, an additive, and a non-silicon surface adjuster, and by not containing a foam stabilizer, the additive including red phosphorus as an essential component and being combined with a phosphate-containing flame retardant and/or a chlorine-containing flame retardant.

Heterogeneous azeotrope or azeotrope-like compositions comprising Z-1-chloro-2,3,3,3-tetrafluoropropene (HCFO-1224yd(Z)) and water which may include from about 47.0 wt. % to about 99.7 wt. % Z-1-chloro-2,3,3,3-tetrafluoropropene (HCFO-1224yd(Z)) and from about 0.3 wt. % to about 53.0 wt. % water and having a boiling point between about 13.0° C. and about 14.0° C. at a pressure of between about 14.0 psia and about 15.0 psia. The azeotrope or azeotrope-like compositions may be used to as blowing agents in the formation of foams.

Described herein is a process for producing a pipe insulated with polyurethane foam, where (a) isocyanates are mixed with (b) polyols, (c) blowing agent including at least one aliphatic, halogenated hydrocarbon compound (c1), made up of from 2 to 5 carbon atoms, at least one hydrogen atom and at least one fluorine and/or chlorine atom, where the compound (c1) includes at least one carbon-carbon double bond, (d) catalyst including N,N-dialkylbenzylamine, optionally (e) chain extenders and/or crosslinkers and optionally (f) auxiliaries and additives to give a reaction mixture, the reaction mixture is applied to a pipe for media and is allowed to cure to give the polyurethane foam. Also described herein is an insulated pipe obtained by such a process and a method of using such an insulated pipe as insulated composite wall pipe for district heating or district cooling networks laid in the ground.

A process for producing E-1,1,1,4,4,4-hexafluorobut-2-ene comprises contacting 1,1,2,4,4-pentachlorobuta-1,3-diene with hydrogen fluoride in the vapor phase in the presence of a fluorination catalyst. A process for producing Z-1,1,1,4,4,4-hexafluorobut-2-ene further comprises contacting E-1,1,1,4,4,4-hexafluoro-2-butene with chlorine in the presence of a catalyst to produce 2,3-dichloro-1,1,1,4,4,4-hexafluorobutane, followed by reaction with base to produce 1,1,1,4,4,4-hexafluoro-2-butyne, and subsequently hydrogenating hexafluoro-2-butyne to produce Z-1,1,1,4,4,4-hexafluoro-2-butene.

A non-combustible mixed refrigerant having a low greenhouse effect and an application thereof, the mixed refrigerant comprises the following components in mass fractions: 4-31.5% of R125, 50-80% of R1234ze (E) and 12-22% of R1234yf. Under the cooperation of each component dosage range, the mixed refrigerant becomes non-combustible, the ODP is 0, and the GWP is not greater than 1000. The present invention may be used in a refrigeration system, does not destruct ozone, reduces the greenhouse effect, and has a low slip temperature, relating to ternary azeotropic or near-azeotropic refrigerants, and being beneficial for the stable operation of a refrigeration system. The mixed refrigerant may also be used as a foaming agent or an aerosol propellant, and has the advantages of being non-combustible, having a low ozone destruction index, and being environmentally friendly, safe and reliable.

A composition kit for preparing a polyurethane foam and a preparation method and applications thereof are provided. The composition kit for preparing a polyurethane foam includes a first component and a second component. The first component and the second component are disposed in different containers respectively. The first component includes an organic isocyanate and a low boiling point foaming agent. The second component includes a polyol composition, a high boiling point foaming agent, a composite catalyst, water, and a silicone oil.

Methods, foams and blowing agents for producing thermoplastic foam having low aged lambda and low foam density, wherein the blowing agent comprises: (a) from about 50% by weight to about 70% by weight of an HFO and/or an HFCO having three atoms; (b) a first co-blowing agent consisting essentially of from about 2% to about 15% by weight of methyl formate; (c) a second co-blowing agent consisting essentially of from about 20% to about 30% by weight of dimethyl ether, isobutane and combinations of these; and (d) a third co-blowing agent consisting essentially of from about 2% to about 25% by weight of carbon dioxide, acetone and combinations of these.