Abstract: Glycidyl ethers prepared from the reaction of 3,3',5,5'-tetraalkyl-4,4'-dihydroxybiphenyl and halohydrin form upon curing resins having high heat distortion temperatures. The ethers have utility in the manufacture of powder coatings, adhesive compositions, laminates and molding compositions.

Abstract: Room temperature curable epoxy compositions and method are disclosed. The compositions comprise resinous epoxide; a mixed amine-ketimine curing agent comprising a cyclic polyamine having at least two epoxide-reactive, aliphatic amino functional groups, a portion of the amino functional groups in the mixed curing agent being in ketimine form the remainder being in the free amine form; and water in at least about the stoichiometric proportion for hydrolyzing the ketimine groups to the free amine form. The compositions may also comprise inorganic filler such as finely divided silica and sand. The ingredients of the composition are mixed to form a sprayable composition.

Abstract: An adhesively superior epoxy resin composition comprises a vicinal polyepoxide, a curing amount of an amine curing agent, and an effective amount of an additive comprising a polyoxyalkylenepolyamine-maleic anhydride condensation product having thioureide, ureide or thioformamide or formamide end groups.

Abstract: The adhesion properties of amine-cured epoxy resins are unexpectedly enhanced by addition of certain diamides of polyoxyalkylenepolyamine-urea condensates. The adhesively superior epoxy resin composition comprises a vicinal polyepoxide, a curing amount of an amine curing agent, and an effective amount of a diamide of a polyoxyalkylenepolyamine-urea condensate having a molecular weight of from 4000 to about 4500.

Abstract: A novel medical catheter, formed of a rubber component comprising substantially a homopolymer of epichlorohydrin and fillers comprising silica and/or silicates, possesses sufficient tensile strength and flexibility and meets the sanitary requirements.

Abstract: An epoxy resin having superior resistance to thermal shock comprises a vicinal polyepoxide, a curing amount of a certain bicyclic anhydride and an effective amount of an additive comprising a polyoxyalkylenepolyamine-maleic anhydride condensation product having thioureide, ureide or thioformamide or formamide end groups.

Abstract: Ether and acetal carboxylates useful as detergent builders to replace sodium tripolyphosphate (STP) in detergent formulations are known to the art. According to the present invention, new and novel polymeric acetal carboxylates are provided which are stable under laundry use conditions, but depolymerize in acid media, making the polymer fragments more readily biodegradable in waste streams.

Abstract: This invention relates to a process for the removal of troublesome secondary products, particularly small quantities of water, solvents, low molecular weight glycols, and pungent-smelling substances, from polyethers by means of a tubular coil evaporator.

Abstract: A mixture of polyamines obtained as a heavy residue from the distillation of a reaction product from the hydrogenation of branched aliphatic dinitriles is useful as curing agent for epoxy resins showing lowered water absorption and significantly higher lap shear strength.

Abstract: The resistance to thermal shock of anhydride cured epoxy resins is improved by the addition of a bis ureide of a polyoxyalkylene polyamine additive. The heat deflection properties of the epoxy resins are not appreciably compromised by the addition of the additive. The improved epoxy resin composition comprises a vicinal polyepoxide, an effective amount of a substituted bicyclic vicinal anhydride curing agent and an effective amount of a thermal shock resistance improving additive consisting essentially of a bis ureide of a polyoxyalkylene polyamine, said additive having an average molecular weight of at least 4,000.

Abstract: Epoxy resin compositions comprising a) a 1,2-epoxide compound containing two or more 1,2-epoxide groups per molecule, b) a cyanic acid ester having two or more cyanic ester groups per molecule, and c) an organic amine are provided.

Abstract: A method of cationic electrodeposition on an electroconductive substrate is disclosed. The method of the invention employs as the electrocoating vehicle an aqueous dispersion of a quaternary ammonium carbonate-containing resin. Electrodeposition of the resin is accomplished without generating harmful acid from the counter ion. The carbonate counter ion is continuously evolved from the electrodeposition bath at the anode as carbon dioxide.The quaternary ammonium carbonate-containing polymers are also useful as feed resins for controlling the pH of aqueous dispersions of acidified cationic resins used in electrodeposition. Upon electrodeposition, these resins generate acid which can build up to undesirable levels in the electrodeposition bath. The quaternary ammonium carbonate-containing polymers are relatively basic and when fed into the bath react with the acid to form the corresponding quaternary ammonium salt of the acid releasing carbon dioxide.

Abstract: Curable compositions are prepared comprising a polyepoxide compound, and as a curing agent, a cyanamide of a secondary amine. The curable compositions may be applied as a one package system and they are useful as laminating, surface coating resins, sintering powders, molding resins and adhesives.

Abstract: The use of cyclic carbonic acid esters of the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, are hydrogen or alkyl with 1 to 6 C-atoms, as a solvent for racemic or optically active poly-(.beta.-hydroxybutyric acid).The preferred embodiment uses hot (120 to 150.degree. C) ethylene carbonate or 1,2-propylene carbonate to extract poly-(.beta.-hydroxybutyric acid) from moist or dry fermentation masses. These solvents have the advantage that the extracted poly-(.beta.-hydroxybutyric acid) is precipitated in good yield from them on cooling. In addition they may be recycled without the need for a solvent regeneration step. These cyclic carbonic acid esters may also be used as the solvent in the processing of poly-(.beta.-hydroxybutyric acid) by e.g. wet spinning.

Abstract: The adhesive strength of amine-cured epoxy resins are improved by the addition of a bis ureide of a polyoxyalkylene polyamine additive. The improved epoxy resin composition comprises a vicinal polyepoxide, an effective amount of a polyamine curing agent, and an effective amount of an adhesive strengthening additive consisting essentially of a bis ureide of a polyoxyalkylene polyamine, said additive having an average molecular weight of at least 4,000.

Abstract: A polymerizable, curable resin composition suitable for molding materials, prepreg, powdery paint materials or the like, which comprises a polyepoxide, a uretdione and a tetraphenyl borate-amine complex. This composition has long pot life and good curability by virtue of latent catalytic characteristics of the complex.

Abstract: Small, round, bio-compatible microspheres capable of covalently bonding proteins and having a uniform diameter below about 3500 A are prepared by substantially instantaneously initiating polymerization of an aqueous emulsion containing no more than 35% total monomer including an acrylic monomer substituted with a covalently bondable group such a hydroxyl, amino or carboxyl and a minor amount of a cross-linking agent.

Abstract: Relatively high molecular weight, fiber-forming, crystalline copolymers of lactide and glycolide are prepared in a two-stage polymerization process. In the first stage there is prepared a random copolymer of a major proportion of an optically active lactide with a minor proportion of glycolide or d,l-lactide. In the second stage, a major amount of glycolide and a minor amount of lactide monomers are admixed with the copolymer of the first stage and the polymerization resumed until there is obtained a high molecular weight addition copolymer of lactide and glycolide containing from about 50 to 75 wt percent of units derived from glycolide. The polymer is fiber-forming and useful in the preparation of absorbable surgical sutures.

Abstract: A Novolak epoxy resin is prepared by adding an aqueous solution of alkali metal hydroxide to a solution of Novolak phenolic resin in epichlorohydrin, distilling off water during said addition in the form of an azeotrope with epichlorohydrin and recycling the latter, while maintaining the reaction medium at 60-80.degree. C and at a pH between 7 and 8 and a water content of from 0.5 to 2.5 wt.% in said medium.The thermosetting resin thus obtained can be used in applications requiring resins with low chlorine contents, low viscosity and high epoxy value.

Abstract: There is provided an electrocoating bath composition for depositing a coat of polymer material onto an anode. This bath composition comprises an essentially aqueous solution, emulsion or dispersion of the polymer and 0.01 by 2.0% by weight with reference to the bath composition of a compound of one of the general formulae:X -- R -- X' or R' -- X -- R -- X'whereinR and R' are each an organic radical,X is one of the following groups: -SH, -OH (phenolic or enolic), .dbd.NH, -- NH.H, andX' is a hydrogen atom or X,the groups X being in such electronic configuration with reference to the organic radical R or the organic radicals R and R' that there is always a presence of labile protons therein under operative conditions of the electrocoating bath, or of a salt of said compound, and the compound or its salt being in an at least partially disassociated state in the electrocoating bath composition and capable of proton association in close vicinity of the anode under conditions of operation.