摘要:
This invention relates to the use of certain finely divided, stable and relatively low viscosity dispersions of polyisocyanate polyaddition products in compounds having hyroxyl groups. The dispersions are produced by reacting1. organic polyisocyanates with2. compounds having primary and/or secondary amino groups and/or primary hydroxyl groups in3. compounds having at least one hydroxyl group, whereinCompounds (3) have secondary hydroxyl groups in cases when compounds (2) have primary hydroxyl groups and wherein the components are reacted in the presence of more than 4% by weight of water, based on the quantity of reaction mixture including water.
摘要:
The invention relates to mixtures containing a) a polymer which may be produced from ethylene, vinyl acetate and optionally further monomers having a vinyl acetate content in the range of 40 to 85 wt. %, b) at least one expandable graphite which may be acidic or neutralised, c) at least one mineral filler, d) optionally further additives, a process for producing them, their use for the production of shaped articles of any type, and flame-retardant intumescent mixtures containing a mixture according to the invention and, furthermore, shaped articles containing a mixture according to the invention.
摘要:
Film-forming, temperature-resistant bonding and coating agents-low in flue gas which are composed of aqueous sols of silicic acid and of amine salts of acid metal phosphates, optionally mixed with amine salts of boric acid, and the in use.
摘要:
Improved microcapsules contain at least one wall which is the reaction product of at least one isocyanate-reactive group and an aromatic isocyanate which hasthe formula: ##STR1## in which n=8 to 20. The microcapsules are useful in carbonless copy paper.
摘要:
Microcapsules having a hydrophobic core material and capsule walls formed by the reaction of water-insoluble polyamines with water-soluble bisulphite adducts of polyisocyanates, a process for the production thereof which is characterized in that a mixture of a hydrophobic core material and water-insoluble polyamines is emulsified in water or in an aqueous protective colloid solution to the required particle size, water-soluble bisulphite adducts of polyisocyanates in the form of powders or aqueous solutions are added and the mixture is left to react to completion at temperatures of from 1.degree. to 140.degree. C., and applications thereof.
摘要:
This invention relates to solutions of polyisocyanate polyaddition products with a solids content of from 5 to 70% by weight ofA. Reaction products of(a) polyisocyanates,(b) hydrazines and/or polyamines and/or dihydrazides and/or ammonia and/or urea and/or low molecular weight polyols,(c) optionally higher molecular weight polyols and(d) optionally formaldehyde inB. polyhydric alcohols having a molecular weight of between 62 and 450.
摘要:
A process for making a hydrophilic polyurethane foam suitable for sponges and wiping cloths which comprises reacting an organic polyisocyanate and an organic compound having reactive hydrogen atoms in a mixture containing a blowing agent and an alkyl aryl sulphonic acid.
摘要:
Process for preparing dimethyl propanephosphonate, characterized in that dimethyl phosphite is reacted with propene in the presence of a free-radical former at a reaction temperature of 60 to 95° C., the half life of the free-radical former being 0.1 to 20 min at the reaction temperature.
摘要:
In the production of a flame resistant, halogen-free polyurethane/polyurea from a polyisocyanate and polyol, wherein to the mixture of polyisocyanate and polyol there is added an amine adduct of an acidic metal salt of the formulaA.sub.1-3 B.sub.0-12 P.sub.3-9 N.sub.4-12 M.sub.0-9 xH.sub.2 O(I),in whichA denotes at least one hydroxide or oxide of a metal selected from the group consisting of aluminum, magnesium, calcium and zinc,B denotes o-boric acid,P denotes an acid containing phosphorus,N denotes at least one of an amine or ammonia,M denotes an alkali metal hydroxide andx denotes an integer from 0 to 90.The products are especially flame resistant foams.