Abstract: A thermally reactive water-soluble urethane prepolymer having a plurality of masked isocyanate groups capable of regenerating free isocyanate groups at an elevated temperature, said urethane prepolymer having the formula: ##STR1## wherein A is an organic bridging group having a valency from 3 to 5,X is the residue of an active hydrogen compound having 2 to 4 active hydrogen atoms with removal of said active hydrogen atoms,Y is a masking group for isocyanate group,Z is the residue of a compound having at least one active hydrogen atom and at least one ionizable group with removal of said active hydrogen atom,a is an integer from 2 to 4, andb and c are such that the sum of b+c equals 2 to 4 and the products of ab and ac are at least 2 and at least 1, respectively.

Abstract: A textile printing paste composition comprising an alkali metal salt of carboxymethylcellulose having an average degree of substitution of at least 2.2 per glucose unit, the aqueous solution of said salt in the concentration of 2% on the anhydrous basis having a viscosity of 10 to 10,000 cps as measured in a B-type rotational viscometer at 20 rpm at 25.degree. C. The composition can meet the basic performance characteristic requirements for use in textile printing.

Abstract: There is provided a method of producing an open-cell polyurethane foam comprising heating a mixture of an aqueous emulsion of a polyurethane-forming composition and a fluorocarbon compound of 1 to 3 carbon atoms having a boiling point of 5.degree. to 100.degree. C. The above emulsion may further contain an ionic surfactant.

Abstract: Mixture of a fuel oil and pulverized coal are stabilized by the addition of a small amount of a polyether-type adduct having a molecular weight of from 6,000 to 600,000 between a lower alkylene oxide and a poly(lower alkyleneimine) compound, or a derivative of said adduct.

Abstract: An aqueous emulsion of a thermally reactive polyurethane composition comprising a blocked polyisocyanate component having at least two masked isocyanate groups in the molecule uniformly dispersed in an aqueous medium, and a reactive anionic surface active agent of the formula:[R--X--CH.sub.2 CH.sub.2 O).sub.l CONH].sub.m A--NHCOSO.sub.3 Na).sub.nwherein R is a C.sub.7 -C.sub.26 alkyl, alkaryl or alkenyl group; X is --O--, --COO--, --S-- or --NR'-- wherein R' is a polyoxyalkylene group or a C.sub.1 -C.sub.22 alkyl group; l is 0 or an integer from 1 to 200; m and n each represents an integer from 1 to 4, the sum of m+n being not greater than 5; and A is the residue of a polyisocyanate compound with the removal of isocyanate groups.

Abstract: Polyisocyanurate foam is produced by reacting a polyisocyanate component with an anhydrous reaction product between a dibasic acid anhydride and a partially alcoholated polyether-polyol with an alkali metal hydroxide and/or alkaline earth metal hydroxide. The reaction product acts as a catalyst for trimerizing the polyisocyanate and also as a polyether-polyol component.

Abstract: Crude liquid polyether-polyols containing an alkaline catalyst are purified by the steps of:neutralizing said crude liquid polyether-polyol with a mineral acid having a dissociation constant of greater than 10.sup.-3 at 25.degree. C.distilling off water from said liquid, and filtering the same. The improvement resides in the step of adding a hydrate of a metal salt of said mineral acid to the liquid polyether-polyol at a stage before the distillation step for promoting the crystal growth of a salt formed from said alkaline catalyst by the neutralization.

Abstract: A fuel slurry comprising a mixture of a fuel oil and pulverized coal may be effectively stabilized with a small amount of adducts of alkylene oxide and an alcohol, an amine, a carboxylic acid or a phenol, or inorganic acid esters of said adducts; or cross-linked products of said adducts or said inorganic acid esters.

Abstract: The improved polyurethane hydrogel is produced by dispersing a reaction product obtained by the reaction of a polyisocyanate having at least two isocyanate groups with a polyether. The polyether comprises a plurality of alkylene oxides, 50 to 90% by weight of which is ethylene oxide, added at random to a polyalcohol having at least two terminal hydroxyl groups in an amount of an average molecular weight within the range of 1,000 to 4,000 per said hydroxyl terminal group of said polyalcohol. The improved polyurethane hydrogel can have a greater water content and is highly stable and highly elastic.

Abstract: A process for producing a flame resistant polyurethane foam by reacting a reaction mixture comprising a polyetherpolyol or a polyesterpolyol having an active hydrogen atom, a polyisocyanate, water and/or a volatile foaming agent, and a catalyst, in which a specific amine compound shown by the general formula as defined hereinafter in the specification is added to the reaction system, and also the flame resistant polyurethane foam produced by the process.

Abstract: A process for producing a flame resistant rigid polyurethane foam by reacting a reaction mixture comprising a polyetherpolyol and/or a polyesterpolyol having an active hydrogen atom, a polyisocyanate, water and/or a volatile foaming agent and an emulsifying agent, in which a specific amine compound shown by the general formula as defined hereinafter in the specification is added to the reaction system, the weight ratio of amine compound to polyetherpolyol and/or polyesterpolyol being from 70:30 to 30:70, and also the flame resistant rigid polyurethane foam produced by the process.

Abstract: An improved hydraulic cement composition having an almost constant air content, which is incorporated with an organic phosphoric acid ester of the formula ##STR1## Wherein R.sub.1 is a group of the formula: R.sub.4 --O--(CH.sub.2 CH.sub.2 O).sub.n -- wherein R.sub.4 is an alkyl having 4 to 18 carbon atoms, an alkenyl having 4 to 18 carbon atoms or an aryl substituted with an alkyl having 4 to 18 carbon atoms and n means an average addition molar number of ethylene oxide and is an integer of 0 to 15 in average, and R.sub.2 and R.sub.3 are the same or different and are each hydroxy or a group of the formula: R.sub.4 --O--(CH.sub.2 CH.sub.2 O).sub.n -- wherein R.sub.4 and n are as defined above, or a salt thereof with an inorganic or organic base, as an air entraining agent, optionally together with a dispersing agent and an accelerator.

Abstract: A hydrophilic and thermoreactive urethane composition having improved properties such as stability in solution, non-tackiness, water resistance and strength and useful in treating and finishing fibrous products prepared by forming a urethane prepolymer containing free isocyanate groups from (a) (1) a compound containing at least 2 active hydrogen atoms, containing an oxyethylene chain, and having a molecular weight of about 200 to 20,000, or (2) a compound containing at least 2 active hydrogen atoms, not containing an oxyethylene chain, and having a molecular weight of about 200 to 20,000 and a compound containing at least 2 active hydrogen atoms, containing an oxyethylene chain and having a molecular weight of about 200 to 200,000; and (b) an excess of a polyisocyanate; and if desired, (c) a chain extender containing at least 2 active hydrogen atoms; whereby the prepolymer has an oxyethylene chain content of 10 to 40% by weight, and then reacting the prepolymer or a solution thereof with not more than 3 time

Abstract: A process for decomposing a polyurethane foam comprising heating the polyurethane foam at a temperature of about 50.degree. to 180.degree. C in the presence of an alcoholate alone, an alcoholate and an alkali hydroxide; or a combination of an alcoholate, or the alcoholate and alkali hydroxide and a decomposition accelerator, where the alcoholate is produced by alcoholating a part of the hydroxyl groups of an alcohol, or a part of the hydroxyl groups of an adduct of the alcohol or amine and an alkylene oxide, with an alkali metal, and the decomposition accelerator is selected from the group consisting of amines such as straight chain aliphatic amines, branched chain aliphatic amines, alicyclic amines, heterocyclic amines, and aromatic amines; those compounds produced by cyanoethylating the above amines or by partly adding an alkylene oxide to the above amines; and amines and urea based compounds, or in the presence of the alcoholate, decomposition accelerator, and an alkali hydroxide.

Abstract: A method for preventing adhesion of rubber or rubber-like material to adjacent surfaces comprises treating a surface of rubber or rubber-like material with an aqueous solution of at least one water soluble aromatic compound having at least one --SO.sub.2 -- group. A surface active agent may be included coexistently in the aqueous solution.

Abstract: Wool fatty acid is effectively separated from wool alcohol or wool wax by treating a mixture of a multivalent metal soap of the fatty acid and the alcohol or wax with a heterogeneous system comprising a water phase and a water-immiscible solvent phase, and allowing the system to separate into respective phases.

Abstract: A heavy duty detergent powder and a process for producing the heavy duty detergent powder which comprises neutralizing a fatty acid having, optionally, dissolved therein at least one nonionic surface active agent with a powdered hydrous sodium carbonate at a temperature higher than the melting point of the fatty acid are disclosed.

Abstract: A process for producing a flame resistant rigid polyurethane foam by reacting a reaction mixture comprising a polyetherpolyol and/or a polyesterpolyol having an active hydrogen atom, a polyisocyanate, water and/or a volatile foaming agent and an emulsifying agent, in which a specific amine compound shown by the general formula as defined hereinafter in the specification is added to the reaction system, the weight ratio of amine compound to polyetherpolyol and/or polyesterpolyol being from 70:30 to 30:70, and also the flame resistant rigid polyurethane foam produced by the process.