Abstract: The present invention relates to a geotextile/polyurethane composite prepared from one or more geotextiles and a blocked isocyanate composition and also to a process for preparing such composites. The inventive geotextile/polyurethane composites may find use as liners for canals and ditches for irrigation and wastewater, roof membranes, secondary containment, etc.

Abstract: This invention relates to polyurethane(urea) encapsulated fertilizer particles which exhibit slow-release properties and to a process for their production. In one embodiment, the process comprises a) applying a polyisocyanate component to fertilizer particles to form isocyanate coated fertilizer particles, b) mixing an inert inorganic filler with said isocyanate coated fertilizer, c) adding an isocyanate-reactive component to the mixture of step b) and d) allowing the reactive components to react to form filler containing polyurethane(urea) encapsulated fertilizer particles containing from about 1 to about 15 percent by weight of filled polyurethane(urea), said percent by weight based on the total weight of the encapsulated fertilizer, with the proviso that the weight ratio of polyurethane(urea) to filler is from about 80:20 to about 30:70.

Abstract: The present invention relates to a geotextile/polymer composite prepared from one or more geotextiles and an aqueous polymer dispersion and also to a process for preparing such composites. The inventive composites may find use as liners for canals and ditches for irrigation and wastewater, roof membranes, secondary containment, etc.

Abstract: The present invention relates to geotextile/polyurethane/polyurea and/or geotextile/polyurea composites prepared by soaking geotextiles with one-component heterogeneous liquid polyurethane compositions and subsequently curing by heat or solvent addition to form a geotextile/polyurethane composite. The inventive composites may find use as liners for canals and ditches for irrigation and wastewater, roof membranes, secondary containment, etc.

Abstract: The present invention relates to a polyisocyanate adduct mixture which at a 100% solids concentration has an isocyanate content of about 4 to 19 weight percent and is liquid at room temperature. The adduct mixture is prepared from a biuret-containing polyisocyanate and a monohydroxy alcohol which contains 11 to 36 carbon atoms. The adduct mixture possesses good storage stability in common polyisocyanate solvents and good compatibility with apolar solvents. The present invention also relates to the use of the liquid polyisocyante adduct mixture in the process of curing alkyd or acrylic resins and to compositions containing the adduct mixture and alkyd or acrylic resins.

Abstract: The present invention relates to a process for the preparation of stable, colloidal, aqueous dispersions of cross-linked urea-urethanes which comprises reacting(a) an aqueously dispersed, substantially linear, isocyanate-terminated prepolymer having a molecular weight of up to about 25,000 and containing(i) about 0 to 120 milliequivalents of ionic groups per 100 grams of prepolymer, and(ii) about 0.35 to 10% by weight, based on the weight of the prepolymer, of lateral and/or terminal, hydrophilic ethylene oxide units wherein components (i) and (ii) are present in an amount sufficient to provide a stable dispersion of the prepolymer in the aqueous medium, with(b) polyfunctional amine chain extenders having an average functionality between about 2.2 and 6.0.The present invention additionally relates to the aqueous dispersions produced by the above process and to the films, coatings or adhesives produced from these dispersions.

Abstract: The present invention is directed to light stable polyisocyanate adduct mixtures with an average functionality greater than 2.0 and an isocyanate content of between about 4 and 19 percent by weight based on solids, which has good compatibility with apolar solvents and good storage stability in a solution of polyisocyanate solvents. The polyisocyanate adduct mixtures are based on the reaction product of a polyisocyanate, preferably a biuret-containing polyisocyanate, with a first monohydroxy compound containing a saturated hydrocarbon chain of at least 8 carbon atoms and a second monohydroxy compound containing at least one polarity inducing group. Alternatively, both the saturated hydrocarbon chain and the polarity inducing group may be present in the same monohydroxy compound.The present invention is additionally directed to the use of the polyisocyanate adduct mixtures in the process of curing alkyd or acrylic resins and to compositions containing the adduct mixture and alkyd or acrylic resins.

Abstract: The instant invention is directed to aqueous dispersions or solutions of polyurethane ionomer characterized by(a) hydrophilic polyalkylene oxide polyether chains in the polyurethane having an ethylene oxide unit content of from 1.2 to 50% by weight based on the polyurethane solid content,(b) a content of from 5 to 250 milliequivalents of ionic groups incorporated in the polyurethane per 100 grams of polyurethane solids content, and(c) from 0.5 to 100% by weight of water soluble electrolytes dissolved in water, based on the polyurethane solids content.

Abstract: Glass fibers for reinforcing thermoplastic resins are sized with an aqueous dispersion comprising a polyurethane-ionomer as a film-forming agent and a bonding agent comprising an epoxy-containing alkoxysilane. Advantageously the polyurethane is a very small particle ionomer and the bonding agent is selected from the group consisting of(a) an epoxyalkyl alkoxysilane+an aminoalkyl alkoxysilane,(b) an epoxyalkyl alkoxysilane+a low-molecular weight aliphatic primary or secondary mono-amine,(c) an aminoalkyl alkoxysilane+a low-molecular weight monoepoxide, and(d) an epoxyalkyl alkoxysilane.

Abstract: The instant invention is directed to a process for the production of inorganic-organic synthetic materials having high strength, elasticity, dimensional stability under heat, and flame resistance, consisting of a polymer-polysilicic acid gel composite material in the form of a solid/solid xerosol, said process comprising mixing(a) an organic polyisocyanate,(b) an aqueous basic solution and/or an aqueous basic suspension having an inorganic solid content of from 20-80% by weight preferably from 30-70% by weight,(c) a flowable inorganic compound and optionally(d) catalysts and other additives and allowing the resulting mixture to react, characterized in that mixing is carried out by first combining components (a) and (b), optionally with the addition of all or part of component (d), to form a stable primary dispersion and thereafter adding component (c), optionally the addition of all or part of component (d), to form a final dispersion.

Abstract: The instant invention is directed to novel polyurethane cationic electrolyte-stable dispersions characterized by lateral or terminal polyalkylene oxide polyether chains containing from 2 to 10%, by weight, of ethylene oxide units, based on the total weight of the polyurethane; a content of ##STR1## groups of from 16 to 100 milliequivalents per 100 g of polyurethane; an average particle size of from 50 to 300 m.mu.; and a solids content of from 10 to 45%.

Abstract: The instant invention is directed to a process for the production of inorganic-organic synthetic materials having high strength, elasticity, dimensional stability under heat, and flame resistance, consisting of a polymer-polysilicic acid gel composite material in the form of a solid/solid xerosol, said process comprising mixing(a) an organic polyisocyanate,(b) an aqueous basic solution and/or an aqueous basic suspension having an inorganic solid content of from 20 to 80% by weight, preferably from 30 to 70% by weight,(c) an organic compound containing at least one isocyanate reactive hydrogen atom and at least one non-ionic-hydrophilic group and(d) optionally catalysts and other additivesand leaving the resulting mixture to react, characterized in that components (a) and (b), optionally with the addition of part or all of component (d) are first mixed together to form a stable primary dispersion and thereafter component (c), optionally with the addition of all or part of component (d), is added to form the fi

Abstract: This disclosure teaches a method of forming mineral mates by using an emulsion of water glass and isocyanates as the binder. This binder composition may be readily dispersed with air and has superior adhesion to mineral fibers.

Abstract: This invention relates to new aromatic uretdione-diisocyanate-disulphonic acids, to a process for the preparation thereof and to the use thereof as components for the production of polyurethane resins. More particularly, the instant invention relates new aromatic uretdione-diisocyanate-disulphonic acids of the general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 each represent a hydrogen, chlorine or bromine atom or a methyl, ethyl or C.sub.1 -C.sub.4 alkoxy group;x represents --O--, >C.dbd.O, >SO.sub.2, ##STR2## or --CH.dbd.CH-- wherein R.sub.7 and R.sub.8 each represent a hydrogen atom, a methyl or ethyl group or, when taken together with the carbon atom to which they are attached represent a cyclohexyl group; andn represents 0 or 1.These novel compounds are prepared by reacting a diisocyanate of general formula: ##STR3## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, n and x are as defined above with SO.sub.3 at temperatures of from -30.degree.

Abstract: This invention relates to the production of composites of organic polyisocyanate plastics and metals. The metals are pretreated with certain adhesion promoters in order to increase adhesion between the metal and the plastic. The pretreated metal sheet or foil is brought into contact with the reaction mixture during the chemical reaction while the plastic is being formed.

Abstract: The instant invention is directed to a process for the production of inorganic-organic resins, by reaction of an organic polyisocyanate with aqueous basic solutions having an inorganic solid content of from 20 to 80% by weight in the presence of catalysts and optionally other additives, characterized in that the organic polyisocyanate and the aqueous basic solution are used in a proportion by weight of between 80:20 and 10:90 parts by weight and that organic ammonium compounds are used as catalysts.

Abstract: Aromatic polyisocyanates containing sulphonic acid or sulphonate groups which are substantially free from crystalline product and a method for making them are provided wherein a mixture of aromatic polyisocyanates having an isocyanato content of from about 10% to about 42% by weight is sulphonated, the improvement which comprises mixing and reacting liquid aromatic polyisocyanates having a viscosity of from about 8 cP to about 49 cP at 25.degree. C. and containing at least 40% by weight of phosgenation products of an aniline-phosgenation condensate and at least about 20% by weight of 2,6-tolylene diisocyanate, 2,4'-diphenylmethane diisocyanate, 2,2'-diphenylmethane diisocyanate or a mixture thereof, based on the weight of said liquid aromatic polyisocyanates with a sulphonating agent in an amount equivalent to from about 0.1% to about 40% by weight sulphur trioxide, based on the weight of said liquid aromatic polyisocyanates.

Abstract: An inorganic-organic plastic having improved strength, elasticity, dimensional stability with increase in temperature and flame resistace and adapted for use in filling cracks and cavities and for making materials useful in the building industry is prepared by (1) premixing (c) an organic compound having at least two reactive hydrogen and at least one non-ionic hydrophilic group with (b) an aqueous silicate and then mixing the resulting mixture with (a) an organic polyisocyanate or (2) mixing (a), (b) and (c) simultaneously and reacting the mixture thus obtained to form a colloidal xerosol.

Abstract: The instant invention is directed to a novel process for the production of inorganic/organic plastic materials and the resultant products. The process generally comprises reacting an aqueous alkali metal silicate solution with a liquid organic polyisocyanate having a viscosity at 25.degree. C of at least about 400 cP. Preferably, the process is utilized to produce high quality, lightweight foams having excellent physical properties.

Abstract: The instant invention relates to hydrophobic inorganic-organic lightweight foams produced from aqueous suspensions of finely divided water-insoluble inorganic materials and polyisocyanates. More particularly, the invention relates to a process for the production of highly filled, hydrophobic, lightweight polyurea foams comprising reacting(a) liquid, water insoluble polyisocyanates free from ionic groups, having viscosities of more than 200 cP at 25.degree. C. and having isocyanate functionalities of greater than 2.1, with(b) an aqueous suspension of inorganic filler, said suspension having a solids content of from 30 to 80 percent by weight and having a pH value of above 8, at least 50 percent by weight of the suspended fillers having a particle size of less than 50 microns,(c) in the presence of the foam stabilizer of the polyether/polysiloxane type and in the presence of a tertiary amine catalyst,The weight ratio of components (b) to component (a) being better 1:2 and 6:1.