A method for preparing block polyether amide foamed particles with sandbag structure includes: premixing modifier, filler and coupling agent, melting and blending the premixed raw materials, and preparing blended particles I with core-shell structure after underwater granulation or water tank granulation; premixing the blended particles I with block polyether amide raw material, melting and blending the premixed raw material, and preparing block polyether amide blended particles II with sandbag structure after underwater granulation or water tank cutting; putting the quantitative blended particle II into an autoclave, introducing quantitative environment-friendly physical foaming agent until the foaming agent and G2 blende particles reach a homogeneous system, evacuating autoclave pressure through a valve, and taking out block polyether amide blended particles III containing the foaming agent; and transferring the blended particles III into a thermostatic equipment at softening temperature of particles, and obtaining the block polyether amide foamed particles after heat preservation.

An isocyanate-based foam composition includes a polyol, an isocyanate-containing component and a silicone polyether Got stabilizer having the following structure: (CH.sub.3).sub.3Si—[OSi(CH.sub.3).sub.2].sub.x—[OSi(CH.sub.3)(Y)].sub.y—OSi(CH.sub.3).sub.3 where x is 0 to 15, y is 1 to 2, and Y is (CH.sub.2).sub.nO—(CH.sub.2CH.sub.2O).sub.e—(CH.sub.2CH(R))O).sub.p—Z where n is 1 to 10, e is 5 to 15, p is zero to 10, R is —CH.sub.3 or CH.sub.2CH.sub.3 and Z is selected from a group consisting of hydrogen, alkyl, aryl, acyl, and alkyl succinic anhydride groups wherein 20 mole-percent or less of the Z N groups are hydrogen, wherein the ratio of e/x is greater than 0.5 and the number average molecular weight of the silicone polyether stabilizer is less than 4300 grams per mole as determined by nuclear magnetic resonance spectroscopy, and wherein the [OSi(CH.sub.3).sub.2] and [OSi(CH.sub.3)(Y)] units can be block or random copolymerized

Disclosed is a composition and process for making a water blown semi-rigid polyurethane foam wherein the polyisocyanate side and the polyol side are combined under ambient temperature conditions. Said foams are particularly suited for sound and vibration management, especially in motor vehicles.

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.

An isocyanate-reactive composition comprises (A) a polyol, (B) a polysiloxane, and (C) a polyether alcohol compound. A composition for preparing a foam comprises the isocyanate-reactive composition, (D) a polyisocyanate, (E) a catalyst, and (F) a blowing agent. The composition forms a foam upon at least components (A) and (D) reacting in the presence of components (E) and (F).

Disclosed herein are copolymers end-functionalized with functionalized silanes of specified structure, rubber compositions comprising the copolymer, and related processes for preparing the end-functionalized copolymer. The present disclosure also relates to tires having at least one component (e.g., a tread) containing the end-functionalized copolymer or a rubber composition thereof. The copolymer comprises 55-80% by weight of a conjugated diene monomer and 20-45% by weight of an aromatic vinyl monomer lacking any nitrogen substitution on its aromatic ring, wherein the total amount of conjugated diene monomer and aromatic vinyl monomer comprise 100% (of the total monomers in the copolymer), and the end-functionalization comprises at least one group having formula (I). ##STR00001##

A composition for a single-component polyurethane foam and a method of using the same. The composition comprises a polyether or polyester or a combination thereof with functionality 2 and a hydroxyl number between about 22 mgKOH/g and about 374 mgKOH/g, a polyether or polyester or a combination thereof with functionality 3 and a hydroxyl number between about 84 mgKOH/g and about 842 mgKOH/g, a fire-retarding agent, a silicone stabilizer, a catalyst, polymeric diphenylmethane diisocyanate, a dimethyl ether, propane, isobutane or a combination thereof, and 1,1-difluoroethane or any other Freon, or any combination thereof.

Provided is a polyurethane foam having a reduced stress relaxation rate and a reduced hysteresis loss rate while having moderate rebound elasticity.

The polyurethane foam is obtained from a composition containing a polyol and an isocyanate. As the polyol, a polyol (a) having a content of an ethylene oxide unit of 60 mol % or more is contained when a total amount of alkylene oxide units is 100 mol %, and a content of the polyol (a) is 60 parts by mass or more and 95 parts by mass or less when a total amount of the polyol is 100 parts by mass.

A polyurethane foam-forming reaction mixture composition including: (I) an organic isocyanate; and (II) an admixture of: (a) at least one autocatalytic polyol; (b) at least one ethylene oxide (EO)-capped polyol; (c) at least one reactive blowing catalyst; (d) at least one surfactant; and (e) water; and a polyurethane foam prepared from the above polyurethane foam-forming reaction mixture composition.

In an HFO-1234ze or HFCO-1233zd formulated polyol, a shelf life improvement may be realized by including in the composition an excess of a carboxylic acid.