摘要:
Compositions made up of an aromatic polyisocyanate and a polyester having an average molecular weight of from about 600 to about 5000, obtainable by self-condensation of ricinoleic acid, optionally with co-utilization of a C2-C20 starter polyol and optional additives. These compositions are useful as binders for the production of composite materials.
摘要:
The present invention is directed to a process for the strengthening of geological formations in underground workings and mines by the introduction of reaction mixtures which react to form polyurethanes into the formations which are to be strengthened, the reaction mixtures being based on(a) a polyisocyanate component,(b) a polyol component and(c) an ester,the ester having a hydroxyl number of about 10 to 630 and an acid number of at most 10 and obtained from (i) an acid component having a carboxyl functionality of at least 1.5 and containing a polymerized fatty acid having at least 12 carbon atoms or mixtures thereof with unpolymerized saturated or unsaturated fatty acids having at least 12 carbon atoms and (ii) a polyol component containing at least one polyhydric alcohol, the ester being present in a positive amount of up to 5% by weight, based on the weight of component (b).
摘要:
The present invention is directed to a process for strengthening geological formations in underground mining or other operations introducing into the formation which is to be strengthened mixtures of a polyisocyanate component (a) and a polyol component (b) which react together to form polyurethanes, characterized in that the polyol component (b) is based on mixtures of (i) organic polyhydroxyl compounds having hydroxyl numbers of about 100 to 600 and (ii) dihydric alcohols having a molecular weight of 62 to about 150, component (ii) being present in an amount of about 0.01 to 20% by weight, based on the total quantity of component (b).
摘要:
The present invention relates to a process for strengthening geological formations in underground mining or underground construction work by the introduction of reaction mixtures which react to form polyurethane plastics into the formations which are required to be strengthened, wherein the reaction mixtures are based on(a) a polyisocyanate component,(b) a polyol component and(c) at least one auxiliary agent or additive, characterized in that component (c) contains a cyclic polydimethylsiloxane in the molecular weight range of 222 to 740 and in a quantity of about 0.01 to 5.0% by weight, based on the total weight of components (a) and (b).
摘要:
Mixtures leading to hard polyurethane foamed materials, which mixtures are preferably present in a pressure vessel, containa) prepolymers containing isocyanate groups, obtainable by the reaction of polyisocyanates containing isocyanurate groups and optionally urethane groups with compounds having at least two hydrogen atoms which are reactive to isocyanates and having a molecular weight of 62 to 10,000, wherein the content of monomeric polyisocyanate in the prepolymer is less than 2 weight %,b) auxiliary process materials and additives known in the art, andc) foaming agents having a boiling point less than 0.degree. C./760 mm Hg.
摘要:
The present invention relates to a process for the production of derived timber products by applying a storage-stable binder to materials containing lignocellulose and heating this mixture under pressure. These storage-stable binders comprise a polyisocyanate and an amine catalysts. The invention also relates to these storage-stable binders.
摘要:
The present invention relates to a process for the production of polyurethane plastics by reacting compounds containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight in the range of from 400 to 10,000, polyisocyanates and, optionally, chain extenders having a molecular weight of from 32 to 400, foam stabilizers, water and/or organic blowing agents in the presence of catalysts containing tertiary nitrogen. These catalysts are characterized in that mixtures of (a) one or more cross-linking catalysts corresponding to the following general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 which may be the same or different, represent C.sub.1 -C.sub.5 -alkyl radicals, preferably CH.sub.3 -- or C.sub.2 H.sub.5 radicals,R' and R" represent hydrogen or the same or different C.sub.1 -C.sub.3 -alkyl radicals, preferably CH.sub.3 -- or C.sub.2 H.sub.5 -- radicals, andn represents an integer of from 1 to 10, preferably from 4 to 8,(b) blowing catalysts corresponding to the following general formula: ##STR2## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, are as defined above andX represents oxygen or ##STR3## where R'" represents a C.sub.1 -C.sub.5 alkyl radical, preferably a CH.sub.3 -- or C.sub.2 H.sub.5 -- radical,p represents an integer of from 2 to 4 andr represents an integer of from 1 to 3, andm and o which may be the same or different, represent numbers ranging from 1 to 10, preferably from 1 to 3 in value.
摘要:
The invention relates to a process for the preparation of N,N-bis-(2-hydroxyalkyl)-aminomethane phosphonic acid dimethyl esters corresponding to the following general formula: ##STR1## wherein each R, may be the same or different and represents hydrogen or, preferably, a lower, linear or branched alkyl radical or halogen-substituted alkyl radical containing from 1 to 6 carbon atoms.
摘要:
The present invention is directed to a process for the production of compression-molded materials by the compression molding lignocellulose-containing materials mixed and/or impregnated with polyisocyanates as binder in the presence of catalysts, the improvement wherein the catalysts used are latent, heat-activatable catalysts based on ammonium salts of the type which can be obtained by reacting(i) monofunctional or polyfunctional, primary, secondary and/or tertiary amines with(ii) alkyl esters of acids of phosphorus.or secondary and/or tertiary amines (i) withacidic alkylester of acids of phosporous (ii) under neutralization in substantially equivalent quantities.
摘要:
The instant invention relates to a process for the production of flame-resistant, hard foams which contain urethane groups from polyisocyanates, active-hydrogen containing compounds, water and/or organic blowing agents, and flame-retarding agents, the improvement wherein the flame-retarding agent used is a mixture of (a) an addition compound of (1) a mono-alcohol, a polyalcohol, or mixtures thereof, and (2) a lactam, and (b) a phosphorous containing acid or acid ester.