Abstract: To chemically bind either impure or purified enzymes to polyurethane to produce insolubilized bound enzymes which are still enzymically active and which may be more stable than the original enzyme, and which can be reused without appreciable activity loss and whose physical characteristics can be varied depending on the application for which they are intended.

Abstract: To chemically bind either impure or purified enzymes to polyurethane to produce insolubilized bound enzymes which are still enzymically active and which may be more stable than the original enzyme, and which can be reused without appreciable activity loss and whose physical characteristics can be varied depending on the application for which they are intended.

Abstract: This invention relates to hydrophilic, odorant-containing foam compositions having improved release ability of the odorant abetted by incorporating the odorant into a non-volatile, water insoluble oil or wax medium which is added to an aqueous reactant prior to reacting the aqueous reactant with a hydrophilic, isocyanate-terminated prepolymer to form a polyurethane foam.

Abstract: The invention disclosed is for novel polyols and a method of making said polyols which comprises interconnecting polyols with epihalohydrin in the presence of substantially an equimolar amount of base based on the epihalohydrin thereby forming an extended polyol with terminal hydroxyl groups and at least one hydroxyl group attached directly to the backbone chain internally. These resultant polyols can be used to make polyurethane foams having high resiliency.

Abstract: This invention relates to new, hydrophilic, fabric softener foam compositions having improved release ability of the fabric softener abetted by the addition of a hydrophilic polyether polyol release agent to the aqueous reactant containing the fabric softener prior to reacting the aqueous reactant with a hydrophilic, isocyanate-terminated prepolymer to form the foam.

Abstract: The invention disclosed is for novel polyols and a method of making said polyols which comprises interconnecting polyols with epihalohydrin in the presence of substantially an equimolar amount of base based on the epihalohydrin thereby forming an extended polyol with terminal hydroxyl groups and at least one hydroxyl group attached directly to the backbone chain internally. These resultant polyols can be used to make polyurethane foams having high resiliency.

Abstract: A fire-retardant protective coating is produced by dissolving a water-soluble polyisocyanate prepolymer in either an aqueous slurry or solution of fire-retardant materials and/or intumescent materials. After mixing, the gel produced can be applied as a coating which is useful for protecting or holding together surfaces vulnerable to fire, heat, air or minor abrasion. After the water evaporates, the cross-linked polyurethane coating has a large solids content of the fire-retardant and/or intumescent materials uniformly dispersed throughout. Preferred prepolymers are liquid with a molecular weight greater than about 2,000 and are made of a random copolymer of ethylene oxide and other alkylene oxides with isocyanate capping.

Abstract: A plant growth media in the form of a gel which is useful for growing plants in the form of seeds, seedlings, cuttings, nursery stock, etc., is obtained by dissolving a water-soluble polyisocyanate capped prepolymer containing said growing plant in an aqueous medium optionally containing various plant growth additives such as fertilizer, agricultural modified minerals and the like. The media can be formed in a variety of shapes.

Abstract: This invention relates to urethane forming compositions and a method of forming polyurethanes having low residual potentially carcinogenic aromatic amines by adding scavengers from the group comprising cyclohexyl monoisothiocyanate and hindered aliphatic monoisocyanates of the general formula: ##STR1## wherein R.sub.1 - R.sub.7 are H, alkyl, cycloalkyl, aryl, alkaryl, aralkyl or mixtures thereof and x is 1 to 7.

Abstract: The invention disclosed relates to hydrophilic polyurethane foam which exhibits improved tensile and tear properties and reduced shrinkage upon drying as a result of incorporation of substantially hydrophilic reinforcing fibers formed from homopolymers and copolymers of polyvinyl alcohol. The reinforced foams also exhibit reduced swelling upon contact with water.

Abstract: Disclosed herein are hydrophilip polyether urethane foams having reduced resiliency and prepared by reacting a polyoxyalkylene urethane prepolymer containing at least 40 mole percent of oxyethylene units; water; and at least about 50 parts, based on the weight of the prepolymer, of a synthetic polymer latex.

Abstract: Disclosed herein is a fabric softener-containing article comprising a fabric softener impregnated into an open-celled reticulated urethane foam; said impregnated foam being compressed to form a sheet or wafer. The fabric softener also acts as a solid binder which maintains the reticulated urethane foam in compressed form. The compressed sheet-like compositions are especially advantageous in that they are only 1/5 to 1/15 the size of comparable materials containing equivalent loadings of fabric softener. During the laundry wash cycle the water-dispersible fabric softener is released allowing the foam to slowly rebound to substantially its original uncompressed shape.

Abstract: The invention disclosed is for new improved hydrophilic crosslinked polyurethane foams prepared by reacting a blend of a monomeric polyol and polyoxyalkylene glycol (the --OH groups of said blend being capped with a polyisocyanate) with large amounts of an aqueous reactant. The resultant foams may be characterized with a broad spectrum of improved properties including hydrolytic stability and tensile strength.

Abstract: Disclosed herein is a polyurethane foam having good wet strength. The foam is prepared by reacting a urethane prepolymer with large amounts of water containing a poly(amino)urea and optionally other ingredients, e.g. surfactants. The poly(amino)urea is characterized as being the water soluble reaction product of a polyamine with a urethane prepolymer, said reaction product being further reacted with a crosslinking agent, e.g. epichlorohydrin.

Abstract: A hydrophilic polyurethane foam for use in a catamenial device such as a tampon is disclosed which can be compressed to less than about 50 percent of its original dry volume, stored in such condition for an extended period of time, and later rapidly re-expanded to at least its dry volume. Prior to compression, the foam is impregnated with a solid inorganic release agent, which is located within the cells of the foam and maintains the separation of the cell walls. Adherence of contiguous cell walls is prevented and the rapid re-expansion of the foam upon contact with moisture or water is thereby facilitated.

Abstract: A process for breaking an oil-in-water or a water-in-oil emulsion comprising treating the emulsion with a demulsifier prepared by; (a) forming a water soluble polyurea by reacting a polyisocyanate and a polyamine in a non-protonic liquid carbonyl solvent; and (b) forming the demulsifier by reacting the water soluble polymer with an alkylating agent.

Abstract: This invention relates to a solid curable composition formed by adding finely divided urea in amounts ranging from 10 to 70 weight percent of the composition to liquid polyene/polythiol curable systems wherein the combined polyene and polythiol contain at least 20 percent by weight of oxyethylene units. The thus formed solid compositions are readily cured by radiation, e.g., high energy ionizing radiation or U. V. radiation in the presence of a photocuring rate accelerator.

Abstract: A process for breaking an oil-in-water or a water-in-oil emulsion comprising treating the emulsion with a demulsifier prepared by; (a) forming a water soluble polyurea by reacting a polyisocyanate and a polyamine in a non-protonic liquid carbonyl solvent; and (b) forming the demulsifier by reacting the water soluble polymer with an alkylating agent.

Abstract: The invention disclosed is a method for preparing new improved polyureas from polyisocyanates and polyamines. The product polyureas are characteristically tough, abrasion resistant resins having broad spectrum utility.