摘要:
A process for preparing double metal cyanide catalysts, comprising combining an aqueous solution of a metal salt of the formula M1m(X)n, with an aqueous solution of a cyanometallic acid of the formula HaM2(CN)b(A)c, where one or both aqueous solutions may comprises at least one water-miscible organic ligand selected from the group consisting of alcohols, aldehydes, ketones, ethers, polyethers, esters, ureas, amides, nitrites or sulfides, if desired, combining the aqueous suspension thus obtained with at least one water-miscible organic ligand selected from the above-mentioned group, which ligand may be identical to or different from any previously added ligand, and separating the resulting two-metal cyanide complex from the suspension.
摘要:
The present invention relates to a process for the preparation of polyether polyols by catalytic reaction of H-functional initiators with lower alkylene oxides, wherein the catalysts used are multimetal cyanide compounds and the H-functional initiators used are butane-1,4-diol, &agr;-hydroxy-&ohgr;-hydroxypoly(oxybutane-1,4-diyl), pentane-1,5-diol, decane-1,10-diol or mixtures of at least two of these compounds.
摘要:
A process for preparing polyetherols by ring-opening polymerization of alkylene oxides onto H-functional initiator molecules comprises at least one process step a) in which a compound of the formula (I) M′aM″b(OH)cOd* Ae*Lf (I), is applied to a solid inert support or incorporated in the latter or molded to form a shaped body is used as catalyst, and at least one process step b) in which a multimetal cyanide compound of the formula (II) M1a[M2(CN)b(A)c]d·fM1gXn·h(H20) eL (II) is applied to a solid, inert support or incorporated in the latter or molded to form a shaped body or in powder or paste form is used as catalyst.
摘要:
A crystalline multimetal cyanide complex of the formula (I) M1a[M2(CN)bL1c]d*e(M1fXg)*hL2′iH2O (I) where M1 is at least one element from the group consisting of Zn(II), Fe(II), Co(III), Ni(II), Mn(II), Co(II), Sn(II). Pb(II), Fe(III), Mo(IV), Mo(VI), Al(III), V(IV), V(V), Sr(II, W(IV), W(VI), Cu(II), and Cr(III), M2 is at least one element from the group consisting of Fe(II), Fe(III), Co(III), Cr(III), Mn(II), Mn(III), Ir(III), Rh(III), Ru(II), V(IV), V(V), Co(II) and Cr(II), L1 is at least one ligand from the group consisting of cyanide, carbonyl, cyanate, isocyanate, nitrile, thiocyanate and nitrosyl, X is a formate anion, an acetate anion or propionate anion, L2 is at least one water-miscible ligand from the group consisting of alcohols, aldehydes, ketones, ethers, polyethers, esters, urea derivatives, amides, nitriles and sulfides, a, b, c, d, e, f, g, h, i are integers, with a, b, c and d being chosen so that the electrical neutrality condition is satisfied, and f and g being chosen so that the electrical neutrality condition is satisfied, the X-ray diffiactogram of which shows reflections at particular d values, can be employed as catalyst.
摘要:
Double-metal cyanide catalysts of the formula M1a[M2(CN)b(A)c]d. fM1gXn. h (H2O). eL, where M1 is a metal ion selected from the group consisting of Zn2+, Fe2+, Co3+, Ni2+, Mn2+, Co2+, Sn2+, Pb2+, Mo4+, Mo6+, Al3+, V4+, V5+, Sr2+, W4+, W6+, Cr2+, Cr3+ and Cd2+, M2 is a metal ion selected from the group consisting of Fe2+, Fe3+, Co2+, Co3+, Mn2+, Mn3+, V4+, V5+, Cr2+, Cr3+, Rh3+, Ru2+ and Ir3+ and M1 and M2 are identical or different, A is an anion selected from the group consisting of halide, hydroxide, sulfate, carbonate, cyanide, thiocyanate, isocyanate, cyanate, carboxylate, oxalate and nitrate, X is an anion selected from the group consisting of halide, hydroxide, sulfate, carbonate, cyanide, thiocyanate, isocyanate, cyanate, carboxylate, oxalate and nitrate, L is a water-miscible ligand selected from the group consisting of alcohols, aldehydes, ketones, ethers, polyethers, esters, ureas, amides, nitriles and sulfides, a, b, c, d, g and n are selected so as to make the compound electrically neutral, and e denotes the coordination number of the ligand, e and f denote fractions or integers greater than or equal to zero, h denotes a fraction or integer greater than or equal to zero, wherein the double-metal cyanides have been applied to or incorporated into solid, inert, unfoamed supports or have been shaped to give moldings.
摘要:
In a process for producing flexible polyurethane foams by reactinga) organic and/or modified organic polyisocyanates withb) relatively high molecular weight compounds containing at least two reactive hydrogen atoms andc) if desired, low molecular weight chain extenders and/or cross linkersin the presence ofd) blowing agents,e) catalysts,f) flame retardants and, if desiredg) further auxiliaries and/or additives,the relatively high molecular weight compounds containing at least two reactive hydrogen atoms (b) comprise at least 10% by weight of polyether polyols which can be prepared by base-catalyzed reaction of lower alkylene oxides with OH-functional initiator substances and are subjected, during or after the molecular addition of alkylene oxide, to a combined thermal/distillative treatment at a water content of at most 0.1% by weight.The flexible PUR foam produced according to the present invention can be used in the automobile and furniture sectors and for producing flexible foam/textile composites.
摘要:
The invention relates to a process for the production of polyurethane foams by reactinga) at least one organic polyisocyanate withb) at least one polyalkylene-polyol (b1) having a hydroxyl number of from 30 to 500, obtainable by alkoxylation of at least one initiator molecule from the group consisting of N,N'-bis(3-aminopropyl)ethylenediamine, tripropylenetetramine and tetrapropylenepentamine using at least one alkylene oxide, preferably ethylene oxide and/or 1,2-propylene oxide, or mixtures of the polyoxyalkylene polyols (b1) and other polyhydroxyl compounds having a functionality of from 2 to 8 and a hydroxyl number of from 15 to 500, andc) if desired, chain extenders and/or crosslinking agents,in the presence ofd) blowing agents and, if desired,e) catalysts andf) additives,and to the novel polyoxyalkylene-polyols (b1) which can be used for this purpose.
摘要:
The invention relates to a process for the production of polyurethane foams by reacting a) at least one organic polyisocyanate with b) at least one polyalkylene-polyol (b1) having a hydroxyl number of from 30 to 500, obtainable by alkoxylation of at least one initiator molecule from the group consisting of N,N'-bis(3-aminopropyl)ethylenediamine, tripropylenetetramine and tetrapropylenepentamine using at least one alkylene oxide, preferably ethylene oxide and/or 1,2-propylene oxide, or mixtures of the polyoxyalkylene polyols (b1) and other polyhydroxyl compounds having a functionality of from 2 to 8 and a hydroxyl number of from 15 to 500, and c) if desired, chain extenders and/or crosslinking agents, in the presence of d) blowing agents and, if desired, e) catalysts and f) additives, and to the novel polyoxyalkylene-polyols (b1) which can be used for this purpose.
摘要:
Coating compositions repairable by introduction of energy, coatings obtained therewith and repairable by introduction of energy, methods of producing them, and their use.
摘要:
A polyurethane which is substantially self-dispersible in water and is obtainable by reactinga) at least one polyisocyanate withb) at least one polyol andc) at least one photoinitiator of the general formula I ##STR1## where R is a radical of the formula II ##STR2## or is --CR.sup.7 R.sup.8 R.sup.9, P(.dbd.O)(R.sup.10).sub.2 or SO.sub.2 R.sup.11,the number-average molecular weight M.sub.n of the polyurethane being greater than 2700, and its use. The invention also relates to aqueous polyurethane resin dispersions and coating compositions comprising the novel polyurethanes, and to their use.