摘要:
The present invention relates to a specific process in which wool is initially subjected to a plasma treatment and then to a wet chemical treatment with a finishing agent, which provides nonfelting wool in a technically simple and easily handleable manner.
摘要:
The invention relates to the antifelt finishing of wool in which the wool is (a) first exposed to a plasma in a corona treatment and (b) subsequently treated with an aqueous dispersion of self-dispersing isocyanates.
摘要:
The present invention relates to water-dispersible polyisocyanates obtained by reacting a) at least one polyisocyanate, b) at least one polyalkylene oxide polyether alcohol optionally containing ester groups, c) at least one quatemized tertiary aminopolyethylene oxide polyether alcohol, and d) optionally, further auxiliaries and additives.
摘要:
The present invention relates to a process for preparing polyisocyanates containing isocyanurate groups by trimerizing a portion of the isocyanate groups of an organic polyisocyanate component containing a) one or more diisocyanates corresponding to formula (1) ##STR1## wherein R represents a saturated, straight-chain, aliphatic hydrocarbon group having 8 to 15 carbon atoms and optionally b) up to 95 NCO equivalent-%, based on the total equivalents a) and b), of one or more organic polyisocyanates other than a), in the presence of trimerization catalysts and terminating the trimerization reaction at any desired degree of trimerization. The invention also relates to the polyisocyanates containing isocyanurate groups obtained by this process and to their use, optionally in excess starting polyisocyanates and optionally blocked with blocking agents for isocyanate groups, as an isocyanate component for preparing polyisocyanate addition products.
摘要:
In a construction material comprising a flexible carrier substrate impregnated or coated with a water-hardening resin, the resin contains as an additive polyether polysiloxane polyurethanes of the formula ##STR1## in which R.sup.1 is lower alkyl,m is the average number of siloxane groups in the range from 5 to 25,R is ##STR2## in which X is lower alkylene,Y is an aliphatic, cycloaliphatic, aromatic or araliphatic moiety, which is unsubstituted or substituted by further ##STR3## Z is a polyether moiety based on ethylene oxide units propylene oxide units, or both with the average number of ethylene oxide and propylene oxide units being in the range fro 10 to 100 andR.sup.2 is lower alkyl.
摘要:
Foaming during setting of a polyurethane fixed dressing, e.g. cast for broken arm, is minimized by utilizing as the dressing a polyisocyanate composition comprising:a) at least one organic polyisocyanate,b) at least one catalyst andc) at least one compound of the formula ##STR1## in which R represents methyl, ethyl or propyl and 1.ltoreq.n.ltoreq.4.
摘要:
Liquid crystalline bis-chlorocarbonic acid esters are 4-hydroxybenzoic acid-(4'-hydroxyphenyl) esters corresponding to the following formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 denote, independently of one another, hydrogen, a halogen atom or a C.sub.1 to C.sub.6 alkyl group. Preparation of (I) and liquid crystalline N-alkyl polyurethanes and polycarbonates prepared form (I) are other invention embodiments.