摘要:
The present invention relates to polyester polyols with low functionality and a process for their production, to prepolymers prepared from these polyester polyols and a process for their production, and to polyurethanes prepared from these polyester polyols and/or from these prepolymers, and to processes for their production. These polyester polyols are produced in a two-step process. In the second step of this two-step process, one or more cyclic ester monomers is reacted with one or more polyester polyols at low temperatures,
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 present invention relates to a process for the preparation of clear, storage-stable isocyanate-terminated prepolymers. These isocyanate-terminated prepolymers are based on hexanediolether carbonate. This invention also relates to the preparation of polyurethanes from these isocyanate-terminated prepolymers.
摘要:
The present invention relates to a method for preparing oligomeric aliphatic diols, polycarbonatediols based thereon and NCO-terminated prepolymers obtainable therefrom. The inventive compounds may find use in the preparation of polyurethanes.
摘要:
The present invention relates to polymer dispersions in polyester polyols, to a process for their preparation of these polymer dispersions and to their use for the preparation of polyurethanes, especially microcellular polyurethanes.