Abstract: A continuous preparation method of an amino resin particulate having a maximum particle size of 40 .mu.m or less and an average particle size of from 5 to 15 .mu.m is described. The method comprises the steps of reacting amino compounds with aldehydes in the presence of an acid catalyst in an aqueous solution to form a solid product and classifying said solid product in the form of a slurry with a combination of at least two grinders and at least two classifiers.

Abstract: Amino resin solutions having an electrical conductivity of <100 .mu.S/cm for impregnating paper are obtainable byA) methylolation of melamine with aqueous formaldehyde in a molar ratio of from 1:2 to 1:5 in the presence of a tertiary organic amine at a pH of from 7 to 12,B) etherification with a molar excess, based on the methylol groups, of a C.sub.1 -C.sub.4 -alcohol in the presence of an unsubstituted or substituted dicarboxylic acid and/or polycarboxylic acid at a pH of from 3 to 6,C) neutralization of the reaction mixture with an inorganic base and removal of the volatile components by distillation, except for a water content of <10% by weight, based on the reaction mixture, andD) addition of a C.sub.1 -C.sub.4 -alcohol to give a solids content of from 40 to 90% by weight, based on the amino resin solution, and removal of insoluble components by filtration.

Abstract: A process for producing a condensed resin dispersion, which comprises subjecting an aldehyde and a compound condensable with the aldehyde, or their precondensate, to a condensation reaction in a dispersion medium consisting essentially of water and/or an organic solvent, to precipitate fine condensed resin particles which hardly settle in said dispersion medium, and then replacing the water and/or the organic solvent by an active hydrogen-containing compound having at least two active hydrogen-containing groups reactive with isocyanate groups.

Abstract: A polylactic acid fiber comprises a blend of poly-L-lactic acid and poly-D-lactic acid and is improved by spinning and then drawing.

Abstract: A process for the preparation of a urea-formaldehyde resin exhibiting reduced gel time and improved stability, wherein the resin contains not more than 10% melamine, which is added during the first stage of the reaction with the other reactants, and wherein the reaction is conducted at an acidic pH.

Abstract: The continuous preparation of melamine/formaldehyde precondensate solutions is carried out by a process in which melamine, formaldehyde and, if required, modifiers and/or additives are metered into a continuous mixer, and the homogeneous mixture is passed into a single-screw or twin-screw extruder, condensed at elevated temperatures, cooled and extruded.

Abstract: Amino-plastic resins soluble in water of which the nitrogenous derivative is chosen from the group comprising urea, 1,3-dimethyl-urea, ethyleneurea, 4,5-dihydroxy-ethyleneurea or their mixtures and the aldehyde derivative is a mixture of from 1 to 99% by weight of glyoxal and from 99 to 1% by weight of glyoxal monoacetal of formula (RO).sub.2 CH--CHO; R=C.sub.1 -C.sub.4 alk, their ethers and their applications in particular with cellulosed fibre treatment.

Abstract: Triazine compounds are disclosed which are useful for imparting UV screening properties to polymers of the formula: ##STR1## wherein R is an electron withdrawing group; R.sub.1 is H, ##STR2## where R.sub.3 is an alkyl group having from one to about six carbon atoms; and R.sub.2 is selected from H and CH.sub.3, also disclosed are polymer compositions having improved UV screening properties containing said triazine compounds.

Abstract: This invention relates to an aqueous solution of water soluble urea-formaldehyde precondensate having a formaldehyde-to-urea (F/U) molar ratio of between about 1.20:1.0 and 1.70:1.0 and to a method for making the precondensate solution by reacting urea and formaldehyde in the presence of acid catalyst in aqueous solution having a pH between about 3.5 and 4.25; then, in neutral to slightly basic solution.

Abstract: A process for curing aminoplast resins using a catalyst comprising a hexamethylenetetramine salt of a strong acid, resins produced according to the process, and the use of such resins in the manufacture of particle boards.

Abstract: A radiation sensitive compound and method for making same. The compound has the general formula: ##STR1## wherein, R.sup.1 and R.sup.2, which may be the same or different, each represents lower alkyl, aryl, X, CHX.sub.2, CH.sub.2 X, CX.sub.3 or NHR.sup.3 wherein R.sup.3 represents hydrogen, lower alkyl, aryl or ##STR2## and provided at least one of R.sup.1 and R.sup.2 is CX.sub.3, X is halogen, and A.sup.1 and A.sup.2 are each residues of A.sup.1 --H and A.sup.2 --H respectively wherein A.sup.1 --H and A.sup.2 --H which may be the same or different are each compounds containing at least one group having an active hydrogen atom. The method comprises reacting together an isocyanate of the formula ##STR3## with a compound of the formula A.sup.1 --H or A.sup.2 --H to obtain the desired compound wherein R.sup.1 or R.sup.4 represents lower alkyl, aryl, X, CHX.sub.2, CX.sub.3, NCO or NHR.sup.5 wherein R.sup.5 represents hydrogen, lower alkyl or aryl and at least one of R.sup.1 and R.sup.4 is CX.sub.3.

Abstract: Hydroxy functional acrylamido amino resins comprising hydroxy-hydrocarbyl groups. The resins are produced by reaction of alkoxymethyl amino resins with acrylamide to introduce acrylamidomethyl groups and then with a polyol to introduce hydroxy functionality. The hydroxy functional acrylamido amino resins may be epoxidized to form polyglycidamides which can then be formulated with epoxy reactants to provide curable epoxy systems.

Abstract: Curable epoxy systems comprising polyglycidamides and epoxy reactants. The polyglycidamides are hydroxy functional polyglycidamides derived from amino resins. The epoxy systems can be used as laminating, encapsulating and coating resins. When the epoxy reactant is an anhydride, cure under ambient conditions is obtained.

Abstract: This invention relates to a linear, low-molecular-weight polyester-based polyol having terminal primary hydroxyl groups, low viscosity, high solids content and having the structural formula: ##STR1## where n is 1 or 2 and at least 70% by weight is n=1, and m=2-10, said polyol being substantially free of cyclohexane dimethanol.

Abstract: This invention relates to certain linear, low-molecular-weight polyester-based polyols having at least two hydroxyl groups, low viscosity, high solids content and having the structural formula: ##STR1## wherein R is a moiety derived from a saturated aliphatic polyhydric alcohol; n is 1 or 2, and at least about 50% by weight, of n is n=1; p is 0 to 4 inclusive and m is 2 to 10 inclusive; said polyol being substantially free of any unreacted polyhydric alcohol.

Abstract: A tanning assistant useful in particular for tanning in combination with aluminum tanning agents is obtained by condensing melamine with glyoxal and/or glyoxylic acid and optionally with an aromatic compound which has a phenolic hydroxyl group or optionally with a condensable nitrogen compound.

Abstract: The transetherification reaction between hydroxyethyl acrylate and hexamethoxymethyl-melamine to produce oligomeric acryloyloxyethoxymethyl-melamines, which can be polymerized to form useful films and castings, can be increased in rate to produce the oligomer having less impurities and other undesirable properties by running the reaction in a hydrocarbon solvent, such as hexane, in the presence of iodine.

Abstract: Aminoplast compositions are cured using a sulfur and phosphorus containing catalyst.

Abstract: Sulfonic acids blocked by reaction with glycidamides. The blocked acids are used as catalysts for resin curing systems and provide viscosity stability and pot life without significant decrease in catalytic activity in comparison with the corresponding free sulfonic acids.

Abstract: A highly stable melamine-formaldehyde condensate solution for use as superplasticizer additives for cement or the like is produced by condensing melamine and formaldehyde in an aqueous medium, sulfonating the melamine-formaldehyde condensate, further condensing and stabilizing the aqueous sulfonated melamine-formaldehyde condensate solution.

Abstract: This invention is directed to adducts of a poly(active hydrogen) organic compound and a polyepoxide comprising the reaction product of a poly(active hydrogen) organic compound and a polyepoxide containing two or more epoxy groups per molecule, said poly(active hydrogen) organic compound being employed in an amount at least sufficient to effect substantially complete reaction of the epoxy groups of the polyepoxide. The adducts are useful in the formulation of high solids coating compositions, polyurethane elastomers, inks, sealants, adhesives and the like.

Abstract: Aqueous gel-forming compositions are prepared by reacting for 1-10 hours at 50.degree.-95.degree. C., melamine, formaldehyde and a sulfurous acid salt with the optional addition of a gel-modifying agent and/or a gelling agent which is added to the composition immediately prior to use.

Abstract: Cationic fixing agents based on the reaction products of(a) a monofunctional or polyfunctional amine having one or more primary and/or secondary and/or tertiary amino groups and(b) cyanamide, dicyandiamide, guanidine or bisguanidinegive improved results when the reaction takes place in the presence of a catalyst (K) selected from metals, metal salts and heterocyclic nitrogen-containing organic bases, particularly zinc chloride.

Abstract: A composition of matter contains as a principal component a material which acts as an ultraviolet light stabilizer. The ultraviolet light stabilizer is formed from the reaction of (a) a methylol or alkoxy alkyl-containing material, and (b) an alkyl substituted piperidine containing material which is represented by the following structural formula: ##STR1## R" is hydrogen or C.sub.1 to C.sub.6 alkyl, R.sub.10 is hydrogen or methyl,Y is a radical derived from a material selected from the group consisting of amino substituted triazines, ureas, glycolurils, phenols, and amides of the formula ##STR2## R' is hydrogen or C.sub.1 to C.sub.12 alkyl and R is an aliphatic, cycloaliphatic, or olefinic radical, or an acrylic polymer moiety having at least one group selected from hydroxyl, carboxyl, amido, and ureido, said reaction proceeding between a methylol or alkoxy alkyl group of (a) and the group selected from hydroxyl, carboxyl, amido and ureido of (b).

Abstract: A process for the manufacture of a solid urea-formaldehyde resin comprises steps (a) to (d). Step (a), the initial reaction step is carried out under specified conditions with an F:U ratio of at least 2.5 to 1. The F:U ratio is lowered by addition of urea in step (c) and water is evaporated without precipitation of the resin in step (d).

Abstract: Stable, water soluble, sulfonated melamine-formaldehyde and sulfonated melamine-urea-formaldehyde resin solutions are prepared in a four stage procedure, wherein (1) melamine or melamine and urea are condensed with formaldehyde in an aqueous medium at a relative low temperature and a pH of 10-13, followed by (2) the addition of a sulfonating agent, such as sodium metabisulfite, and continued reaction without pH adjustment, followed by (3) lowering the temperature of the reaction medium to 40.degree.-60.degree. C., adjusting the pH to 2.5-4 and continuing the reaction for about 5-150 minutes, and finally followed by (4) adjusting the pH to 6.5-9, heating the reaction medium to 70.degree.-100.degree. C. for 30-180 minutes, adjusting the final solids content to a predetermined value, such as 20%, and adjusting the pH to 8-11. The resulting aqueous solutions are suitable for use as superplasticizer additives to hydraulically settable cementitious materials.

Abstract: The formaldehyde emission in the thermoplastic processing of antioxidant containing oxymethylene copolymer molding compositions is reduced considerably if these molding compositions additionally contain on the surface or homogeneously mixed in a specifically defined formaldehyde binding material which contains in the molecule at least two 4,6-diamino-1,3,5-triazin-2-yl groups. In this way there are avoided deposits on the die and odor annoyance.

Abstract: N,N',N"-tris-(2-hydroxyethyl)-melamine, if required, as a mixture with N-mono- and N,N'-bis-(2-hydroxyethyl)-melamine, is prepared by reacting melamine with ethanolamine in the presence of an acidic catalyst by a method in which the reaction is carried out at from 120.degree. to 250.degree. C. using an excess of ethanolamine, and the molar ratio of free ethanolamine to the sum of free and converted melamine is not permitted to fall below 4:1 during the entire reaction time, and the stated (2-hydroxyethyl)-melamines are used as modifiers in the prepartion of aminoplast resins which are suitable for laminating surfaces.

Abstract: Thermally stable water soluble resins are prepared in a multistep process by reacting the waste solids from the mother liquor waste stream of a melamine manufacturing plant with an aldehyde and a sulfonating agent under controlled conditions of pH and temperature. The resin compositions are useful, for example, as superplasticizing agents for concrete mixtures, as mud drilling additives, and in the paper and textile industry. The process not only provides useful resin compositions, but also recovers solid wastes which are considered to be a major contributor to the pollution problems of melamine manufacturing plants.

Abstract: A wet spray booth treating agent, characterized by containing melamine-aldehyde acid colloid solution and a method for the treatment of a wet spray booth, characterized by the use of the aforementioned treating agent.

Abstract: An aliphatic isocyanate compound containing at least one N-methylene isocyanate group of the formula: ##STR1## formed as a reaction product of isocyanic acid and a compound containing at least one N-alkoxymethyl group of the formula: ##STR2## wherein R is C.sub.1 -C.sub.8 alkyl.

Abstract: High solids coating compositions which comprise the reaction product of an aliphatic diol having a chain length between hydroxyls of greater than C.sub.10 and a reactant selected from the class consisting of lactones, epoxides and mixtures thereof are disclosed. The reaction products along with a suitable curing agent may be used as the principal resinous binders in the coating composition or may be used as reactive diluents.

Abstract: A moulding composition which forms stable, durable mouldings which are color stable, have good water resistance and can be glass clear and fire-resistant, comprises a melamine-formaldehyde resole of mole ratio melamine:formaldehyde in the range 1:1.1 to 1:5.0, and from 20 to 80% by weight, based on the resole, of a glycol or glycol derivative. The composition may also contain one or more of water, polyvinyl alcohol, aluminium hydroxide and reinforcing fillers. The melamine in the resole may be partially replaced with urea. Cure of the resin composition, after shaping, takes place at a pH of at least 6.0, and is accelerated by boron oxide and also by microwave heating. Foamed products are especially useful.

Abstract: A method for the production of hydroxyalkylmelamine containing resins wherein melamine, formaldehyde and a hydroxyalkylmelamine are reacted under conditions such that a resin is produced which, when incorporated into a decorative laminate, enhances the post-forming thereof, the resin per se, paper sheets containing said resin, a method for the production of laminates and the laminates per se, are disclosed.

Abstract: A class of epoxy compounds, (i.e. polyglycidamides) are blended with polyamines and other epoxy reactive oligomers to provide crosslinkable coating systems. When the systems are cured they are tough and abrasion resistant, possess solvent, chemical and water resistance and UV stability.

Abstract: There is disclosed the reaction product of an N-(substituted oxymethyl)melamine and a 2-mercaptoarylthiazole and its use as an adhesion promoter to improve rubber to metal wire adhesion.

Abstract: A polymeric material comprising a solid dispersion of a porous three-dimensional polymer with a pore diameter of 0.002 to 10 .mu.m and a permeability coefficient of from 2.times.10.sup.-7 to 2.times.10.sup.31 2 cm.multidot.sec.sup.-1. This material is produced by reacting formaldehyde with at least one monomer capable of forming, with formaldehyde, a polymer of a three-dimensional structure. The reaction is carried out in the presence of a polymerization catalyst in an aqueous medium at a pH of from 0.1 to 4, while maintaining the polymer concentration within the range of from 20 to 65% by mass. Thereafter the solution with the polymer is maintained for a period sufficient to form a porous polymer in the form a solid dispersion.

Abstract: A solid urea-formaldehyde resin is provided, having a degree of condensation of 25% to 45%.A process for making the resin is also described and includes several steps. Urea and formaldehyde is first reacted with a molar ratio of U:F of 1:2.5 or more then concentrated. Further urea is added to reduce the ratio to the range 1:1.1 to 1:2 and further concentration is achieved without precipitation of solid resin by the use of a stabilization agent.

Abstract: A protective coating composition containing a polycaprolactone polyol and an aminoplast derivative is applied to a thermoplastic substrate to produce a thermoformable article having abrasion resistance, solvent resistance and weatherability.

Abstract: A coating resin composition consisting essentially of(A) a triazine-type resin obtained by co-condensing a triazine-type amino compound represented by the general formula ##STR1## wherein X is hydrogen, methyl, ethyl, propyl, phenyl or amino, formaldehyde and a polyol and as required, a monohydric alcohol, and(B) a polyisocyanate,the solids weight ratio of (A) to (B) being from 5:95 to 95:5.

Abstract: Disclosed herein is an ungelled, crosslinkable, hydroxyl-group containing resin having a molecular weight of less than 4500. The ungelled, hydroxyl-group containing resin is a reaction product of components comprising (A) a nonaromatic polyol having a molecular weight of less than 230, and (B) an aminoplast.Also disclosed is a curable composition containing such hydroxyl-group containing resin.

Abstract: In a microencapsulation process which causes hydrophobic core material containing an oil-soluble melamine-formaldehyde precondensate to emulsified in water or in a hydrophilic medium, and to form capsule wall film under conditions for promoting polycondensation, the process which is characterized in that said oil-soluble melamine-formaldehyde precondensate is 40 to 100% in a degree of formaldehyde substitution, 80 to 100% in alkylation degree, and 4 to 11 in hydrophobic degree.

Abstract: A textile finishing composition comprising (1) a diluent and (2) a durable press resin composition containing (a) an aminoplast resin and (b) an aldehyde. The textile finishing composition is combined with an acid catalyst and applied to textile materials to impart softness, improved wetting properties and durable press properties.The textile finishing composition is applied at lower than normal dry add-on levels to textile materials to provide textile materials having lower levels of formaldehyde.

Abstract: A method for the production of melamine/aldehyde filaments by reacting a crystalline melamine and a solid aldehyde generating compound in a single pass reactor and extruding the resultant molten mass through a spinnerette into a reaction chamber maintained under specific temperature conditions and in the presence of air is disclosed.

Abstract: A novel epoxy ester resin adapted for use in a thermosetting coating composition is provided, having number average molecular weight (M.sub.n) about 1000 to about 5000 and being the reaction product of diepoxide, for example bisphenol-A epichlorohydrin epoxy resin, with (i) diphenol, for example bisphenol-A, in chain extension reaction, (ii) dicarboxylic acid, for example the dimer acid reaction product of the dimerization of C-18 fatty acid, in chain extension reaction, and (iii) fatty acid, for example Soya fatty acid, in chain terminating esterification reaction, which chain extension reactions and esterification reaction occur at least in part substantially simultaneously and at a temperature reaching at least about 137.degree. C. (280.degree. F.). Preferably, catalyst is employed for said chain extension and esterification reactions.

Abstract: The wet fastness properties of direct or reactive dyeings on cellulosic substrates are improved by aftertreatment with an agent comprising(A) a linear or crosslinked polymer comprising repeating units containing at least two quaternary nitrogen atoms linked by bridging groups connected to the quaternary nitrogen atoms by alkylene or arylene groups; optionally(B) an N-methylol derivative of a urea, melamine, guanamine, triazinone, urone, carbamate or acid amide;and, as an essential component,(C) a catalyst for the cross-linking of N-methylol compounds of the type (B) above,and subsequently carrying out a heat-curing step.Certain of the quaternary polymers (A), containing melamine groups, are novel.

Abstract: A thermosetting coating composition containing an acid-curable amino resin and from 0,1 to 10 percent by weight of a blocked sulphonic acid, calculated on the weight of amino resin. The blocked acid used is an O-sulphonyl hydroxamic ester of the formula [RSO.sub.2 ONHCOO].sub.n A, wherein n represents an integer from 1 to 5 and R and A are organic groups.The new blocked acids are better soluble in the current solvents used in these coating compositions.The compositions may be used advantageously for coating a substrate by electrostatic spraying.

Abstract: A novel cationic aminoplastic water-dispersible resin based on melamine, formaldehyde and glyoxal salified by a mineral or organic protonic acid, or by a mixture of such acids, selected from the group comprising hydrochloric, nitric, orthophosphoric, acetic, formic acids; it contains molar ratios, for 1 mole of melamine, of 2 to 4 moles of formaldehyde, 0.1 to 3 moles of glyoxal and 0.5 to 1 mole of mineral or organic protonic acid, or the equivalent quantity of a mixture thereof.

Abstract: The present invention relates to new condensation products of(A) 1 mole of a highly etherified hexamethylol melamine and(B) 3 to 6 moles of a thiol of the formulaR.sub.f --X--SH, (1)Rf standing for perfluorinated alkyl with 4 to 14 C-atoms and X for divalent ethylene or isopropylene radicals, wherein the components (A) and (B) are reacted under increasing temperature up to at least 145.degree. C. within a period of at least 40 minutes.In form of their aqueous dispersions, the condensation products are suitable for oil- and water-repellent finishing of fibrous, preferably textile materials.

Abstract: Aftertreatment of dyeings on cotton or nylon with (A) a polybasic compound which is the product of reacting a primary or secondary amine with cyanamide, dicyandiamide, guanidine or biguanidine and, sequentially or simultaneously (B) a precondensate formed by reacting a compound of type (A) with an N-methylol derivative gives wet fastness properties superior to those given by either (A) or (B) used alone.