摘要:
A method for reducing the cold flow of a polymeric composition of matter by introducing polymer with the combination or reaction product of (i) an acetal or ketal of an alditol and (ii) (a) a hydrocarbylated boric acid, (b) an organoaluminum compound, or (c) both a hydrocarbylated boric acid and an organoaluminum compound.
摘要:
A method for reducing the cold flow of a polymeric composition of matter by introducing polymer with the combination or reaction product of (i) an acetal or ketal of an alditol and (ii) (a) a hydrocarbylated boric acid, (b) an organoaluminum compound, or (c) both a hydrocarbylated boric acid and an organoaluminum compound.
摘要:
A method for preparing a polymeric composition, the method comprising providing a polymer cement including a polymer and a solvent; introducing a cold-flow inhibitor with the polymer cement, where the cold-flow inhibitor is selected from the group consisting of vicinal diamides, vicinal diureas and vicinal amide-ureas; and isolating at least a portion of the polymer and the cold-flow inhibitor from the solvent to provide a polymeric composition including the polymer and the cold-flow inhibitor.
摘要:
A method for preparing a polymeric composition, the method comprising providing a polymer cement including a polymer and a solvent; introducing a cold-flow inhibitor with the polymer cement, where the cold-flow inhibitor is selected from the group consisting of vicinal diamides, vicinal diureas and vicinal amide-ureas; and isolating at least a portion of the polymer and the cold-flow inhibitor from the solvent to provide a polymeric composition including the polymer and the cold-flow inhibitor.
摘要:
A method for preparing a polymeric composition, the method comprising providing a polymer cement including a polymer and a solvent, introducing an acetal or ketal of an alditol with the polymer cement, and isolating at least a portion of the polymer and the acetal or ketal of an alditol from the solvent to provide a polymeric composition including the polymer and the acetal or ketal of an alditol.
摘要:
A method for preparing a polymeric composition, the method comprising providing a polymer cement including a polymer and a solvent, introducing an acetal or ketal of an alditol with the polymer cement, and isolating at least a portion of the polymer and the acetal or ketal of an alditol from the solvent to provide a polymeric composition including the polymer and the acetal or ketal of an alditol.
摘要:
A method is presented for making alkoxy-modified silsesquioxanes (AMS) or co-alkoxy-modified silsesquioxanes (co-AMS,) comprising the steps of (a) combining as a reaction mixture (i) water, (ii) an acid-stable solvent for the water, (iii) a solid strong cationic hydrolysis and condensation catalyst, and (iv) a trialkoxysilane compound, (b) allowing the reaction mixture to react for about 0.5 hours to about 200 hours to form the alkoxy-modified silsesquioxanes; and (c) recovering the alkoxy-modified silsesquioxanes from the reaction mixture. The use of solid strong cationic catalysts in this reaction system is advantageous because they remain as solids throughout the reaction, allowing simplified separation of the solid catalyst from the soluble AMS or co-AMS products, resulting in total or near total recovery of the AMS or co-AMS products, the products being free of, or substantially free of residual acid catalyst, as well as virtual total recovery of the catalyst for recycling. The improved AMS and co-AMS compounds, vulcanizable rubber compounds containing them, and a pneumatic tire having a component made from the vulcanized rubber compounds are also presented.
摘要:
A functionalized polymer terminated by using an isocyanato alkoxysilane terminating agent. A method of preparing a functionalized polymer comprising the step of contacting a living polymer with an isocyanato alkoxysilane terminating agent.
摘要:
An amino alkoxy-modified silsesquioxane (AMS) comprising one or more compounds selected from the group consisting of an amino AMS, an amino/mercaptan co-AMS, an amino/blocked mercaptan co-AMS, mixtures thereof, and a weak acid-neutralized solid or aqueous solution thereof, and a method of making the amino AMS, are presented. The compounds are useful in compounding, processing, cure and storage of silica-reinforced rubbers because they contain low levels of volatile organic compounds (VOC).
摘要:
Metallated aminosilane compounds for use as functional initiators in anionic polymerizations and processes for producing an aminosilane-functionalized polymer using the metallated aminosilane compounds to initiate anionic polymerization of at least one type of anionically polymerizable monomer. Preferred use of the metallated aminosilane compounds results in rubber compositions for use in tires comprising an aminosilane functionalized polymer.