Abstract: This invention relates to thermoplastic moulding compositions of vinyl chloride polymers, certain graft polymers, certain resin-like copolymer additives and certain rubber-like copolymers for the production of films having improved resistance to ageing.

Abstract: The invention relates to soft polymer alloys based on graft polymers and crosslinked, particulate acrylate copolymers which are suitable for the production of flexible moulding compositions having increased resistance to ageing and better resistance to solvents.

Abstract: Thermoplastic moulding compositions consisting of from 1 to 99% by weight of at least one cellulose ester or cellulose mixed ester, from 99 to 1% by weight of an aliphatic polyester or polyether containing carbonate groups and, optionally, standard auxiliaries and additives.

Abstract: The present invention is concerned with a new class of compounds prepared by reacting cyclic aminals of the formula ##STR1## with polyisocyanates of the formula R.sub.5 (NCO).sub.m+n to yield ##STR2## and with this process for obtaining said compounds, as well as the use of such compounds in polyurethane chemistry. If such compounds are free of isocyanates (n=0) they are useful as latent cross-linkers or hardeners activatable by heat or moisture. If such compounds carry free isocyanate groups (n=1 or 2) there are useful as synthetic resin precursors. In the above formulaem represents an integer of from 1 to 3, andn represents 0, 1 or 2, and the sum of m+n is 2 or 3,R.sub.1 represents an aliphatic hydrocarbon group which is optionally cyano-substituted and which has from 1 to 6 carbon atoms, a cycloaliphatic hydrocarbon group having from 5-10 carbon atoms or an araliphatic hydrocarbon group having from 7-10 carbon atoms;R.sub.

Abstract: The present invention relates to a process for the production of metal effect lacquerings having improved weather-resistance by the multilayered lacquering of various substrates, using a clear layer as top coat and a lacquer containing metal pigments to form the outer layer of the multilayered lacquering which is covered by the layer of clear lacquer, characterized in that the clear lacquer used is one the main binder of which is a two-component system consisting of:(a) a polyol component consisting essentially of polyester polyols having a low aromatic component content and optionally also polyacrylate polyols; and(b) a polyisocyanate component having biuret and/or isocyanurate groups, as well as aliphatically-bound isocyanate groups which may be blocked with isocyanate blocking agents. The present invention also relates to the substrates coated with these lacquers.

Abstract: The present invention is concerned with an improved process for the production of partially trimerized hexamethylene diisocyanate which yields isocyanurate isocyanates which have low viscosity and low monomer contents by the use of a quaternary ammonium hydroxide catalyst which is hydroxyalkyl substituted at its N atom.

Abstract: The present invention provides a two-component composition for use to form a solvent-free fixing material suitable for use in dentistry, which fixing material is liquid at room temperature and has a viscosity in the range of from 5,000 to 100,000 cP, said compositions having: a first component comprising at least one organic polyisocyanate with aliphatically and/or cycloaliphatically bonded isocyanate groups; and a second component comprising (a) at least one polyhydroxy compound having a molecular weight in the range of from 200 to 20,000, being substantially free of ether groups, and having at least 2 aliphatically bonded OH groups and (b) from 1 to 60% by weight, relative to the total mixture, of monohydric and/or polyhydric alcohols with a molecular weight below 200 and/or from 0 to 40% by weight, relative to the total mixture, of oligomeric polyesters containing at least 2 OH groups or ester-diols, with an average molecular weight of from 100 to 500, the first and second components of the mixture being p

Abstract: The present invention relates to a process for the production of coatings by coating substrates of any type with a coating composition of which the binder consists essentially of a mixture of:(a) a polyisocyanate component and(b) at least one organic polyhydroxyl compound, distinguished by the fact that the polyisocyanate component(a) is a reaction product obtained from:(i) a polyisocyanate mixture which, in addition to from about 20 to 80%, by weight, of 2,4'-diisocyanato diphenyl methane, contains a total of from about 80 to 20%, by weight, of 2,2'-diisocyanato diphenyl methane, 4,4'-diisocyanato diphenyl methane and, optionally, higher nuclear polyisocyanates of the diphenyl methane series and(ii) a polyhydroxy polyether containing at least one tertiary amine nitrogen atom and having an average molecular weight of from about 500 to 10,000 or a polyhydroxy polyether mixture containing at least one such polyhydroxy polyether and having an average molecular weight of from about 500 to 10,000.

Abstract: This invention discloses mixtures for use as binders for solvent-free lacquers which are liquid at room temperature, can be prepared in the presence of moisture and have good light stability and resistance to weather.The mixtures contain:(a) at least one organic polyisocyanate which contains aliphatically bound isocyanate groups;(b) at least one polyhydroxyl compound with a molecular weight of 200 to 2000 which is free from ether groups; and(c) 0-40 percent by weight, based on the total mixture of monohydric and/or polyhydric alcohols with a molecular weight below 200;the components of the mixture being used in such quantities that the NCO/OH ratio is between 0.8:1 and 1.2:1.

Abstract: The present invention relates to a new organic heterocyclic isocyanate which is the reaction product of an organic diisocyanate and an amino or hydroxy nitrile. The invention also relates to a process of producing such isocyanates by reacting an excess of the diisocyanate with the nitrile under conditions under which the nitrile will not decompose and then maintaining the reaction mixture at an elevated temperature until the isocyanate nitrile adduct cyclizes. The reaction may be carried out in the presence of a catalyst for isocyanate addition reactions. Additionally, the invention relates to a process for the production of polyurethane by the reaction of the heterocyclic isocyanates with compounds carrying at least two isocyanate reactive hydrogen atoms per molecule.

Abstract: The present invention relates to a new organic heterocyclic isocyanate which is the reaction product of an organic diisocyanate and an amino or hydroxy nitrile. The invention also relates to a process of producing such isocyanates by reacting an excess of the diisocyanate with the nitrile under conditions under which the nitrile will not decompose and then maintaining the reaction mixture at an elevated temperature until the isocyanate nitrile adduct cyclizes. The reaction may be carried out in the presence of a catalyst for isocyanate addition reactions. Additionally, the invention relates to a process for the production of polyurethane by the reaction of the heterocyclic isocyanates with compounds carrying at least two isocyanate reactive hydrogen atoms per molecule.

Abstract: The method is based on the fact that the particular components are conveyed through separate pipes into a mixing chamber. By measuring the transit time in at least one of the pipes the flowrate can be measured. The flow in the other pipes which is in a fixed ratio to the first flow is then adjusted automatically. For measuring the transit time a heat pulse is injected in at least one of the pipes and the transit time of the heat impulse is measured. The so-measured transit time is converted into an inversely proportional voltage and the flowrate in the other pipes is adjusted proportionally to this voltage. An apparatus is provided for practicing the method. The apparatus comprises flow measuring elements which are electrical connected to control devices which operate flow control devices in the pipes leading to the mixing chamber.

Abstract: The instant invention provides a method for determining the streaming velocity of a streaming liquid by injecting a thermopulse into the liquid and measuring its transit time. The pulse is detected by its ascending flank at downstream points and by its ascending or descending flank at its point of injection. For short transit times, provision is made to eliminate the heat up time of the heating wire imparting the pulse from the transit time measurement. The liquid may stream continuously or discontinuously, and if the later, provision is made to delay measurement on initiation of flow until the flow pattern has stabilized. The time is determined by counting pulses from a pulse generator during the period the pulse is traveling between the point of injection and a detection point or between two detection points.

Abstract: The present invention relates to a new organic heterocyclic isocyanate which is the reaction product of an organic diisocyanate and an amino or hydroxy nitrile. The invention also relates to a process of producing such isocyanates by reacting an excess of the diisocyanate with the nitrile under conditions under which the nitrile will not decompose and then maintaining the reaction mixture at an elevated temperature until the isocyanate nitrile adduct cyclizes. The reaction may be carried out in the presence of a catalyst for isocyanate addition reactions. Additionally, the invention relates to a process for the production of polyurethane by the reaction of the heterocyclic isocyanates with compounds carrying at least two isocyanate reactive hydrogen atoms per molecule.

Abstract: The present invention relates to a process for the production of polyisocyanate polyaddition products by reacting organic polyisocyanates with compounds which give off organic diamines under the hydrolytic influence of water and also with water, optionally in the presence of sub-equivalent quantities, based on the NCO-groups present in the reaction mixture, of organic compounds containing isocyanate-reactive hydrogen atoms, wherein polycyclic condensation products of formaldehyde with aliphatic or cycloaliphatic diprimary 1,2-diamines are used as the compounds which give off organic diamines under the hydrolytic influence of water. The present invention also relates to the mixtures preferably used for carrying out this process, containing:(a) at least one organic polyisocyanate; and(b) a moisture-activatable hardener for component (a); distinguished by the fact that condensation products of formaldehyde with aliphatic or cycloaliphatic diprimary 1,2-diamines are used as hardener (b).

Abstract: A process for the production of a crosslinkable low-molecular weight acrylic resin containing hydroxyl-groups and having a low-molecular consistency factor by the radical bulk copolymerization of(A) 0 to 30 parts by weight of a hydroxyalkyl ester of acrylic acid or methacrylic acid or mixtures thereof;(B) 0 to 60 parts by wt. of styrene or a substituted styrene or methyl methacrylate or mixtures thereof;(C) 10 to 90 parts by weight of an acrylic acid ester or of a methacrylic acid ester with 2 to 12 carbon atoms in the alcohol radical or mixtures thereof;(D) 0 to 30 parts by weight of an .alpha.,.beta.

Abstract: The present invention is concerned with a process for producing biuret polyisocyanates and the polyisocyanates so produced. These isocyanates are produced by the reaction of at least about a four fold molar excess of a diisocyanate having aliphatically bound isocyanate groups with amino alcohols having a particular structure at a temperature between about 90 and 200.degree. C. The amino alcohols contain at least three carbon atoms, have their hydroxyl and amino groups separated by at least two carbon atoms, and may contain urea, urethane, ether or amino bonds. The present invention is also concerned with a process for producing two component and one component moisture curing lacquers using the biuret polyisocyanates of the present invention and the lacquers so produced.

Abstract: This invention relates to new liquid cycloaliphatic triisocyanates and to their use as isocyanate components for the production of polyurethane resins by the known isocyanate polyaddition process.

Abstract: The instant invention is directed to new liquid bicycloaliphatic triisocyanates and to the use thereof as the isocyanate component in the production of polyurethane plastics by the known isocyanate-polyaddition process. The new triisocyanates are particularly suitable for use as the isocyanate component in low-solvent, light-stable two-component polyurethane lacquers.