摘要:
The invention relates to a process for the preparation of a polyurethane polymer, comprising the step of reaction ofA) polyester polyols with secondary hydroxyl end groups, which are obtainable from the reaction of a polyester comprising carboxyl end groups with an epoxide of the general formula (1): wherein R1 represents an alkyl radical or an aryl radical and wherein the polyester comprising carboxyl end groups has an acid number of from ≧25 mg of KOH/g to ≦400 mg of KOH/g and a hydroxyl number of ≦5 mg of KOH/g, with B) polyisocyanates which are chosen from the group comprising toluoylene-diisocyanate, diphenylmethane-diisocyanate, polymeric diphenylmethane-diisocyanate, xylylene-diisocyanate, naphthylene-diisocyanate, hexamethylene-diisocyanate, diisocyanatodicyclohexylmethane and/or isophorone-diisocyanate. The invention furthermore relates to polyurethane polymers prepared by such a process.
摘要:
The invention is directed to novel poly(ether-ester)polyols, processes for their production from monocarboxylic or polycarboxylic acid esters with one or more bound polyether chain(s). This invention also relates to the production of polyurethane materials in which the isocyanate-reactive component comprises these poly(ether-ester)polyols.
摘要:
The invention is directed to novel poly(ether-ester)polyols, processes for their production from monocarboxylic or polycarboxylic acid esters with one or more bound polyether chain(s). This invention also relates to the production of polyurethane materials in which the isocyanate-reactive component comprises these poly(ether-ester)polyols.
摘要:
The invention is directed to novel poly(ether-ester)polyols, processes for their production from monocarboxylic or polycarboxylic acid esters with one or more bound polyether chain(s). This invention also relates to the production of polyurethane materials in which the isocyanate-reactive component comprises these poly(ether-ester)polyols.
摘要:
The invention is directed to novel poly(ethcr-ester) polyols, processes for their production from monocarboxylic or polycarboxylic acid esters with one or more bound polyether chain(s). This invention also relates to the production of polyurethane materials in which the isocyanate-reactive component comprises these poly(ether-ester)polyols.
摘要:
The present invention relates to a process for the preparation of polyether ester polyols starting from fatty acid esters and starter compounds having Zerewitinoff-active hydrogen atoms, and to their use in the production of solid or foamed polyurethane materials.
摘要:
The present invention provides a process for the preparation of polyols based on fatty acid esters and starter compounds having Zerewitinoff-active hydrogen atoms and the use thereof for the preparation of polyurethane materials.
摘要:
The present invention provides a process for the preparation of polyols based on fatty acid esters and starter compounds having Zerewitinoff-active hydrogen atoms and the use thereof for the preparation of polyurethane materials.
摘要:
The present invention relates to a process for the preparation of polyether ester polyols starting from fatty acid esters and starter compounds having Zerewitinoff-active hydrogen atoms, and to their use in the production of solid or foamed polyurethane materials.
摘要:
The invention relates to a process for the preparation of polyether polyols with equivalent molecular weights of from 8,000 to 20,000 g/mol from one or more H-functional starter compounds and one or more alkylene oxides in the presence of a double metal cyanide catalyst, characterized in that the alkylene oxides are metered into the reactor in the course of from 15 to 23 h.