Abstract: Ester-modified poly(alkylene carbonate) polyahls comprising the residues of at least one polyahl, polyalkyleneoxy moieties, poly(alkylene carbonate) moieties, the residues of at least one ester of a carboxylic acid, and a plurality of active hydrogen end group are disclosed. The ester-modified poly(alkylene carbonate) polyahl has a number average molecular weight higher than the number average molecular weight of any known poly(alkylene carbonate) polyahl comprising the same monomeric components. Also disclosed are isocyanate-functional prepolymers of these ester-modified poly(alkylene carbonate) polyahls formed by reactions of the ester-modified poly(alkylene carbonate) polyahls of this invention with excess organic polyisocyanates. Urethane/urea polymers formed by the reactions of the isocyanate-functional prepolymers with polyahls are also disclosed.

Abstract: A process produces microporous powders or shaped articles, in particular membranes in the form of flat films, tubular films or hollow fibers, which may be used for controlled release of an active compound, for dialysis, gas separation, ultrafiltration or microfiltration, from polyvinylidene fluoride and/or polyphenylene sulfide and/or polysulfone and/or polyacrylonitrile and/or ethylene/vinyl alcohol copolymer and/or ethylene/chlorotrifluoroethylene copolymer and/or polyethersulfone and/or polyether-imide and/or polymethyl methacrylate and/or polycarbonate and/or cellulose triacetate. The process utilizes phase separation by means of thermally induced triggering or triggering induced by a non-solvent of a solution of the polymer in a mixture containing .epsilon.-caprolactam as the essential dissolving constituent. The solution may be formed before the phase separation is triggered.

Abstract: To mold artificial leather provided with real leather like feeling or touch on the surface thereof, a leather wrinkle pattern is formed on the artificial leather in such a way that the ridge portions are glazed and the furrow portions are matted. For the purpose of molding the above-mentioned artificial leather, the inner surface of the metallic mold is contrary formed in such a way that the ridge portions are matted but the furrow portions are glazed.

Abstract: A superabsorbent, thermoplastic polymeric composition comprising:(A) from about 86 to about 98 percent by weight, based on the total weight of the composition, of a poly(oxyethylene) diol soft segment having a weight average molecular weight in the range of from about 5,000 to about 50,000; and(B) from about 2 to about 14 percent by weight, based on the total weight of the composition, of a hard segment which has a melting point above ambient temperature and below the temperature at which decomposition of either the composition or the soft segment takes place, is essentially insoluble in water, and phase separates from the soft segment, said hard segment being selected from the group consisting of polyurethanes, polyamides, polyesters, polyureas, and combinations thereof;wherein the soft and hard segments are covalently bound together by means of urethane, amide, ester, or secondary urea linkages or combinations thereof.

Abstract: The present invention relates to a novel chain extender for use in making moldings. The chain extender broadly comprises the reaction product of an aromatic diamine and a cyclic carboxylic acid anhydride.

Abstract: The present invention is directed to a process for the production of isocyanurate polyisocyanates containing aliphatically and/or cycloaliphatically bound isocyanate groups by trimerizing a portion of the isocyanate groups of organic diisocyanates containing aliphatically and/or cycloaliphatically bound isocyanate groups in the presence of a trimerization catalyst and terminating the trimerization reaction at the desired degree of trimerization by the addition of a catalyst poison, characterized in the quaternary ammonium fluorides are used as the catalyst.The present invention is also directed to the use of these isocyanurate polyisocyanates for the production of polyurethane lacquers.

Abstract: A shaped polyphosphazene article having a modified surface portion thereof and exhibiting a desired property and/or performance comprises a polyphosphazene polymer having at least 50 molar % or more of repeating units of the formula (I): ##STR1## wherein R.sup.1 and R.sup.2 in the first and second side chains --OR.sup.1 and --OR.sup.2 respectively represent, independently from each other, an aliphatic, cycloaliphatic or aromatic radical, and having at least a portion of a surface portion thereof in which at least 5 molar % of the first and second side chains are converted to one or more types of third side chains --OR.sup.3 wherein R.sup.3 represents an aliphatic, cycloaliphatic or aromatic radical and which are different from --OR.sup.1 and --OR.sup.2.

Abstract: Poly(alkylene carbonate) polyahl polymers containing two or more acid-terminal moieties are disclosed. Acid-terminal polyahls provided herein are useful as surfactants or as intermediates for the syntheses for other polymers.

Abstract: The invention relates to a resin for the production of cellulose based products, such as particle boards. The resin is a condensation product of formaldehyde, urea and phenol and optionally melamine with a molar ratio of 1.4-0.8 moles of urea, 0.006-0.04 moles of phenol and 0-0.04 moles of melamine per mole formaldehyde. The invention also relates to a method of producing such a resin. According to the method a separately prepared cross-linking agent containing a co-condensate of phenol, formaldehyde and urea or containing a co-condensate of phenol and formaldehyde together with urea, is added to a pre-condensate of formaldehyde, urea and optionally melamine, whereafter the mixture is condensed. As an alternative the cross-linking agent can be added to a finished condensate of formaldehyde, urea and optionally melamine.The invention also relates to a method of manufacturing glued cellulose based products.

Abstract: Phenolic resin compositions.Phenolic resin compositions containing an additive consisting of at least 20% by weight of an alkaline or alkaline-earth metaborate relative to the total weight of the additive.Applications to the manufacture of phenolic pre-preg mats which are stable in storage.

Abstract: A polyether polycarbonate block copolymer nonionic surface-active agent and method for making the same. The polyether polycarbonate surface active agent is comprised of a hydrophilic portion comprised of a polymer selected from the group consisting of a polyoxyalkylene polyether, a saccharide, a saccharide polyoxyalkylenate, a polycarbonate having a carbon dioxide content of from about 1 to 15 molar percent and mixtures thereof and a hydrophobic portion comprising alkylene and carbonate units arranged in alternating or random order to form a poly(alkylene carbonate) having a total carbon dioxide content of from about 25 to 50 molar percent and a total molecular weight of from about 300 to 10,000. The hydrophobic portion is bonded to the hydrophilic portion at each side of a reactive hydrogen. The surface active agent is prepared by polymerizing the hydrophilic portion with the hydrophobic portion in a weight ratio of about 10:90 to 90:10.

Abstract: Modified poly(alkylene carbonate) polyahls comprising the residue of at least one polyahl, at least one modifier, poly(alkyleneoxy) units, poly(alkylene carbonate) units, and a plurality of active hydrogen end groups are disclosed. The modified polyahls have an average molecular weight higher than any known polyahls containing at least the same weight percent modifier and the same poly(alkyleneoxy) and poly(alkylene carbonate) residues. Also disclosed are isocyanate-functional prepolymer compositions of these modified poly(alkylene carbonate) polyahls, which contain the residue of at least one modified poly(alkylene carbonate) polyahl of this invention and excess organic polyisocyanate units. Urethane/urea polymers formed by the reactions of the isocyanate-functional prepolymers with polyahls are also disclosed.

Abstract: A precipitation polymerization process for producing a macroporous cross-linked copolymeric lattice, capable of adsorbing hydrophilic and lipophilic fluids, in which process there is copolymerized at least one monounsaturated monomer and at least one polyunsaturated monomer in the presence of an organic liquid which is a solvent for the monomers but not for the copolymer, initiating the copolymerization of the monomers by means of a free radical generating catalytic compound, precipitating a copolymer in the solvent in the form of a powder, and forming a dry powder by removing the solvent from the precipitated copolymeric powder. One monomer is a hydrophilic compound and the other monomer is a lipophilic compound.

Abstract: A dimensionally heat-recoverable article has on one of its surfaces a heat-curable adhesive coating. The coating has a mixture of substantially solid particles of a first reactive component with separate substantially solid particles of at least a second reactive component, the first and second components being capable of reacting together to effect curing of the coating when the heat-recoverable article is heated to its recovery temperature. The particles have a size distribution in which not more than 40% by weight of the particles are less than 50 micrometers in size and at least 90% by weight of the particles are less than 300 micrometers in size.