Abstract: A flexible hydrophilic MDI based polyurethane foam is produced by mixing together an aqueous phase which can optionally contain reinforcing fibers and surfactants and a resin phase comprising a prepolymer derived from a poly (oxy C.sub.2-4 alkylene) diol, an MDI containing isocyanate product having a functionality greater than 2.0 made of a mixture of MDI and isocyanate containing derivatives of MDI, and a polymeric poly (oxy C.sub.2-4 alkylene) polyol cross-linking agent having 3 or 4 hydroxyl equivalents per mole and a molecular weight of at least 500. The preferred polyol is Poly G176-120. The polymeric polyol cross-linking agent is present so the hydroxy equivalents constitute 5 to 35 mole % of the total hydroxy equivalents in the diol and the polymeric polyol while the ratio of the isocyanate equivalents to the total hydroxyl equivalents is in the range of 2.5 to 3.5.

Abstract: A solvent-free resin mixture which is curable by thermosetting, in particular for use as a highly heat-resistant impregnating, varnishing and casting resin for the insulation of electrical conductors and windings in electrical machinery and equipment, contains at least one reactive liquid epoxide compound, at least one reactive liquid polyisocyanate and at least one latent hardener for these components; the mixture also contains triallyl cyanurate as a crosslinking agent.

Abstract: A new and useful method for extracting propolis from substantially clean raw material to obtain a dry propolis powder. Depending upon the method employed, either a water soluble propolis powder or an organic soluble propolis powder may be obtained. A unique method for purifying the propolis extract is also disclosed. Both the methods for extracting propolis-containing raw material and the water soluble dry propolis powder are claimed. The propolis powder exhibits, among other things, bactericidal viricidal, analgesic, anaesthetic and regenerative properties.

Abstract: A process for the preparation of homogeneous and cellular polyurethane plastics by the reaction of(a) organic polyisocyanates;(b) compounds containing at least 2 Zerewitinoff-active hydrogen atoms and having molecular weights of from 400 to 10,000;(c) chain extenders, and, optionally, additional(d) short-chained compounds containing at least 2 Zerewitinoff-active hydrogen atoms and having a molar mass of from 32 to 400, as well as, optionally,(e) catalysts, blowing agents and other known additives,is described, which is characterized in that 1,4-3,6-dianhydro-hexites, preferably 1,4-3,6-dianhydro-D-sorbitol and/or 1,4-3,6-dianhydro-D-mannitol, optionally mixed with lower molecular weight compounds, preferably with polyols having a molecular weight of from 62 to 400, particularly preferably butane diol-1,4 are used as the chain extenders. The new chain extenders produce high quality elastomers and foams.

Abstract: The cure time of polyurethane prepolymer curable with water to form polyurethane hydrogel is prolonged by the addition to the water of certain micelle-forming adducts which substantially extend the cure time.

Abstract: Oligomeric formal diols are prepared by coupling segments of copolyether glycols with formaldehyde. The formal diols are useful in preparing polyurethanes.

Abstract: Low temperature flexible polyurethane elastomers are prepared by reacting organic polyisocyanates with polyester polyols which have glass transition temperatures of -10.degree. to -80.degree. C. and incorporating therein alkoxylated esters of fatty acids and/or alkoxylated terpene alcohols.

Abstract: An encapsulant material suitable for use in space applications a polyurethane having according to the ESTEC specification a total mass loss of not greater than 1% and condensible volatiles content of not greater than 0.1% combined with a vibration performance characterised by a Q of from 4 to 15 and a peak frequency of 200 to 400 Hz when vibrated at 1g.

Abstract: A single component enamel composition comprising a polyester component containing more than one hydroxy group in the molecule and a hardener component, said hardener comprising at least one diisocyanate capped with .epsilon.-caprolactam and/or at least one polyisocyanate containing isocyanaturate groups capped with .epsilon.-caprolactam.

Abstract: Highly stable emulsions of biocides in liquid fertilizer compositions are disclosed which offer unexpected stability thus permitting application of both biocides and liquid fertilizers simultaneously. The improved emulsion stability can be obtained by utilizing higher polyoxyalkylene glycol ethoxylate esters or combinations thereof with certain anionic emulsifiers. Stable aqueous emulsions are also disclosed.

Abstract: There is provided a polymeric bacteriocidal composition comprising a thermoplastic, partially cross-linked polyurethane having --NH--(C.dbd.O)--O-- urethane linkages and/or urea linkages --NH--(C.dbd.O)--NH-- and iodine complexed with a sufficient number of these linkages to provide bacteriocidal properties to said composition. The polyurethane has an average molecular weight between 35,000 and 50,000, an ultimate elongation of 200 to 800% and a Shore A scale hardness of 60 to 95. The composition is shaped into a conventional medical appliance form, e.g. a catheter.

Abstract: A polymethylene polyphenyl polyisocyanate composition comprising polymethylene polyphenyl polyisocyanates, a part of the isocyanate groups contained therein being substituted by a carbamate group, or said polymethylene polyphenyl polyisocyanates having the substituted carbamate group and polymethylene polyphenyl polyisocyanate not having carbamate group. The total amount of the carbamate groups contained in the composition is up to 10 percent by mole based on the total amount of isocyanate groups contained in the composition. The composition is useful for the preparation of rigid polyurethane which has many industrial applications. A process for the preparation of the composition is also disclosed.

Abstract: A radiation-hardenable binder comprising a reaction product ester containing hydroxyl groups and hydroxyalkyl acrylates, which comprises:(A) 1 NCO gram equivalent of a polyisocyanate containing from 2 to 3 isocyanate groups per molecule; (B) from 0.4 to 1.2 OH gram equivalents of an ethylenically-unsaturated partial ester having an OH number of from 80 to 150 of an alkoxylated trimethylol propane having a degree of alkoxylation of 3 to 4.5 and acrylic acid or methacrylic acid or a mixture thereof; and (C) from 0 to 0.6 OH gram equivalents of a hydroxy alkyl acrylate or hydroxy alkyl methacrylate or a mixture thereof containing from 2 to 6 carbon atoms in the alkyl group, wherein the sum total of the OH-gram equivalents of B and C is between 1 and 1.2.Aqueous dispersions containing the binder are used for impregnating, coating, reinforcing or priming textile materials, wood, plastics, non-wovens or leather.

Abstract: Amino catalyst mixtures containing from 10 to 95 percent by weight of 2-diisopropylamino ethanol and from 5 to 90 percent by weight of an amine or mixture of amines selected from the group described herein has been found to be a replacement for N-ethylmorpholine in the production of polyurethane foams.

Abstract: Inert esters of rosin and a primary polyhydric alcohol, such as rosin-pentaerythritol esters, are modified by reacting commercially available rosin esters which contain residual hydroxyl groups with a lower aliphatic carboxylic acid or anhydride, for example, acetic anhydride or propionic anhydride, to substantially completely esterify the residual hydroxyl groups. The resulting inert, completely esterified rosin esters, when formulated with non-polar natural rubber or SBR in adhesive systems, results in a time-stable tack value not available with conventional rosin esters.

Abstract: Improved flame retardance is imparted to high molecular weight aromatic polycarbonate resins by selecting appropriate fluorinated diphenols and incorporating them in homopolymers or copolymers. The fluorinated diphenols have at least one fluorinated alkyl or fluorinated aryl group upon the methylene carbon atom positioned between the two phenol ring structures. The polycarbonates having improved flame retardance are made from fluorinated diphenols and halogen-containing carbonate precursors. Copolycarbonates having improved flame retardance are derived from the fluorinated diphenols and non-fluorinated diphenols. The flame retardant polycarbonates may be used in films and molded articles where improved resistance to flame is desirable.

Abstract: A polyacetal suitable for moldings which are excellent in lubricity, wear and antistatic properties, which has at least one terminal of its linear polymer molecule capped with an alkylene oxide adduct of an alcohol or a carboxylic acid, which adduct is of the formula ##STR1## wherein R.sub.o is a hydrogen atom, alkyl group, substituted alkyl group, aryl group, or substituted aryl group, R.sub.o 's may be the same or different, R.sub.1 is an alkyl group, substituted alkyl group, aryl group, or substituted aryl group, R.sub.2 is a hydrogen atom, alkyl group, substituted alkyl group, aryl group, or substituted aryl group, m is from 2 to 6, and n is from 1 to 1,000; the number average molecular weight of said polyacetal being in the range from 10,000 to 500,000 excluding the terminal group.

Abstract: The alkali metal salts of fatty acids (soaps) remaining in fatty acid ester products after interesterification and other processing steps are decomposed by dissolving the fatty acid ester product in a suitable solvent, adding water, saturating the mixture with carbon dioxide, removing the water phase containing excess carbon dioxide and bicarbonate of the alkali metal, converting the bicarbonate into carbonate, and using the carbonate in refining, interesterification and other reactions in the processing of fatty acid esters.

Abstract: A urethane-modified ester of rosin and a primary polyhydric alcohol has negligible hydroxyl content and is particularly useful as a polar tackifier in an adhesive composition made with a polar elastomer. The modified ester is prepared by reacting a rosin ester, for example, a rosin-pentaerythritol ester which contains some residual hydroxyl groups with a suitable isocyanate or diisocyanate.

Abstract: An MDI based polyurethane foam having cellulose foam properties is produced by mixing together an aqueous phase which can optionally contain reinforcing fibers and surfactants and a resin phase comprising a prepolymer derived from a poly(oxy C.sub.2-4 alkylene)diol, an MDI containing isocyanate product having a functionality greater than 2.0 made of a mixture of MDI and isocyanate containing derivatives of MDI, and a monomeric polyol cross-linking agent having 3 or 4 hydroxyl equivalents per mole. The preferred polyol is trimethylolpropane and the preferred diol is Carbowax 1000. The diol and the polyol, such as trimethylolpropane, are present in a mole ratio in the range of 4:1 to 8:1 while the ratio of the isocyanate equivalents to the total hydroxyl equivalents is in the range of 3:1 to 4:1. The isocyanate containing product comprises more than 50% by weight of the prepolymer and Isonate 143L is the preferred isocyanate product. The foam has a minimal swell when wet and it does not curl upon drying.