摘要:
The invention relates to thermoplastic polyurethanes, obtainable by reacting polyisocyanates with chain extenders and polymer polyols, wherein the polymer polyol is prepared by using a difunctional polyether polyol having exclusively primary OH groups and a molecular weight of from 500 to 2000 as a carrier polyol.
摘要:
Thermoplastic polyurethanes which have a hardness of from 50 Shore A to 80 Shore A and are based on (b) polyester diols, wherein a polyester diol (b1) based on butane-1,4-diol and at least one further diol having at least 5 carbon atoms and a polyester diol (b2) based on butane-1,4-diol and at least one further diol having two or three carbon atoms are present as (b) polyester diols.
摘要:
The invention relates to a process for preparing prepolymers containing isocyanate groups by reacting a) diisocyanates with b) compounds having at least two hydrogen atoms which are reactive toward isocyanate groups in the presence of c) catalysts, and subsequently separating off the excess monomeric diisocyanates, wherein the diisocyanates a) used are unsymmetrical diisocyanates and the catalysts c) used are organometallic catalysts and these organometallic catalysts are removed, blocked or deactivated before the monomeric diisocyanates are separated off.
摘要:
The invention relates to stabilizers containing at least two phenolic groups bonded to one another via a connecting radical (II) which is a polyol with a number-average molecular weight of from 75×F g/mol to 250×F g/mol, preferably from 100×F g/mol to 200×F g/mol, in particular from 100×F g/mol to 150×F g/mol, where the term F is the number of phenolic groups in the molecule.
摘要翻译:本发明涉及通过连接基团(II)彼此键合的至少两个酚基的稳定剂,所述连接基团是数均分子量为75xFg / mol至250xFg / mol,优选为100xFg / mol的多元醇, mol至200xF g / mol,特别是100×g g / mol至150xF g / mol,其中术语F为分子中酚基数。
摘要:
A composite material, wherein the composite material comprises, in firmly bonded form, (i) a top layer based on a plastic dispersion and (ii) a substrate layer selected from a film based on thermoplastic polyurethane, a nonwoven based on thermoplastic polyurethane and/or polyurethane foam.
摘要:
The invention relates to mixtures (1) comprising (a) polytetrahydrofuran and (b) stabilizers having a molecular weight of from 600 g/mol to 10000 g/mol and comprising at least two phenolic groups.
摘要:
Thermoplastics comprising plasticizer (i), wherein the plasticizer (i) is based on a polyether having at least one hydroxy group, and the at least one hydroxy group in the plasticizer has been alkylated or has been esterified with a monocarboxylic acid.
摘要:
Branched copolymers of polypropylene (PP) and polysilanes are prepared by procedures involving melt phase hydrosilylation. Such branched copolymers may be formed in situ during the melt phase hydrosilylation or may be prepared by subsequent processing. The branched copolymers exhibit superior properties.
摘要:
(EN) The invention relates to a method for reacting thermoplastic polyurethanes (i) with compounds containing isocyanate groups (ii), wherein compounds (iia) containing at least three aliphatic isocyanate-based groups and compounds (iib) containing two aromatic isocyanate-based groups are used in the form of the compounds (ii) containing isocyanate groups.