Abstract: A copolymer prepared from a bis-(N-alkyphthalimide), a dianhydride and a diamine, and a process of preparing the copolymer by reacting a bis-(n-alkyphthalimide) with an alkali to form a tetracid, dehydrating the tetracid to a dianhydride and reacting the dianhydride with a diamine under copolymer forming conditions.

Abstract: The subject invention pertains to a novel class of fire- and heat-resistant bisimide resins prepared by thermal polymerization of maleimido or citraconimido substituted 1-[(dialkoxyphosphonyl)methyl]-2-4 and -2,6-diaminobenzenes. Typical polymer precursors have the chemical structure: ##STR1## wherein R is alkyl, substituted alkyl or aryl, and R.sup.1 is hydrogen or lower alkyl.The polymer precursors are prepared by reacting 1-[(diorganooxyphosphony)methyl]-2-4- and -2,6-diaminobenzenes with maleic anhydride or citraconic anhydride in a mole ratio 1:2. Chain extension of the monomers is achieved by reacting the mono-N-maleimido derivatives of 1-[(diorganooxyphosphonyl)methyl]-2,4 and -2,6-diaminobenzenes with aryl tetracarboxylic dianhydrides, such as benzophenone tetracarboxylic dianhydride, or aryl diisocyanates, such as methylenebis(4-phenylisocyanate), in a mole ratio 2:1.

Abstract: An antimicrobial latex composition is disclosed. The antimicrobial latex composition comprises (1) at least one cationic latex component selected from a cationic natural rubber latex and a cationic synthetic polymer latex and (2) a cationic antimicrobial agent incorporated in said cationic latex (1). The resulting composition is antimicrobial latex compositions suitable for use in the manufacture of medical devices and appliances, sanitary products, equipment and furnishings for use in food manufacture and processing, and so forth, in particular antimicrobial latex compositions retaining good stability over a long period of storage.

Abstract: Method for recovering an aromatic polyether as a solid product from a solution thereof in an organic solvent by precipitating with a fluorohydrocarbon which may also contain chlorine or bromine and which boils at -30.degree. C. to +100.degree. C.

Abstract: In a multilayer printed circuit board comprising an insulating substrate and a plurality of circuit elements provided thereon in layers, each of which is composed of a circuit pattern and an insulating resin layer provided over the circuit pattern, the circuit patterns arranged adjacently to each other being portionwise connected electrically through via at least one hole, the improvement in which said insulating resin layer comprises a photoset resin of an aromatic polyamide having at least 10 molar % of a constitutional unit of the formula (Ia): ##STR1## wherein each of R.sup.1 and R.sup.2 independently is a hydrogen atom or a residue of a reactive organic compound, Ar.sup.1 is a divalent aromatic residue, and Ar.sup.2 is a divalent aromatic residue possessing a photosensitive group.

Abstract: A two part impression material suitable for use as a dental impression material comprises a first part containing a product of the reaction of an alpha, beta-ethylenically unsaturated dicarboxylic acid anhydride, such as maleic anhydride, and a liquid polydiene resin, e.g. polybutadiene, and a second part containing a setting agent for the reaction product which setting agent is an alkoxylated fatty mono-amine or an alkoxylated fatty polyamine having from 2 to 30, preferably 5 to 15 moles of alkoxylate per mole of the fatty amine. The alkoxylate groups of the setting agent being one or more groups selected from the group comprising ethoxylate, propoxylate and butoxylate groups. A method of taking a dental impression using the reaction product of the first and second parts of the two part dental impression material is also disclosed.

Abstract: The subject invention pertains to a novel class of fire- and heat-resistant bisimide resins prepared by thermal polymerization of maleimido or citraconimido substituted 1-[(dialkoxyphosphonyl)methyl]-2-4 and -2,6-diaminobenzenes. Typical polymer precursors have the chemical structure: ##STR1## wherein R is alkyl, substituted alkyl or aryl, and R.sup.1 is hydrogen or lower alkyl.The polymer precursors are prepared by reacting 1-[(diorganooxyphosphonyl)methyl]-2-4- and -2,6-diaminobenzenes with maleic anhydride or citraconic anhydride in a mole ratio 1:2. Chain extension of the monomers is achieved by reacting the mono-N-maleimido derivatives of 1-[(diorganooxyphosphonyl)methyl]-2,4 and -2,6-diaminobenzenes with aryl tetracarboxylic dianhydrides, such as benzophenone tetracarboxylic dianhydride, or aryl diisocyanates, such as methylenebis(4-phenylisocyanate), in a mole ratio 2:1.

Abstract: High molecular weight siloxane polyamic acids and polyimides are prepared by the reaction of dianhydrides with diamines in a polar aprotic solvent, all of the reagents and solvent being highly purified and substantially anhydrous. The polyamic acids may be coated on substrates and baked to form polyimide dielectric layers. When so used, they are free from certain disadvantages of lower molecular weight polymers, especially undercutting and scum formation during photolithography and etching procedures.

Abstract: Easily dyeable polyester fiber consisting of a copolyester having 80 to 98 mole % of ethylene terephthalate units, and having a degree of crystallinity (X.sub.c) and a birefringence (.DELTA.n) satisfying the following relationship (1), and a peak temperature (T.sub.max) at which the dynamic loss tangent (tan .delta.) measured at a frequency of 110 Hz becomes maximum and a maximum tan .delta. value (tan .delta.).sub.max within the following ranges (2) and (3):X.sub.c (%)<-710.times..DELTA.n+110 (1)90.degree. C.<T.sub.max .ltoreq.107.degree. C. (2)0.135<(tan .delta.).sub.max .ltoreq.0.300 (3)The fiber is prepared by extruding the copolyester having 80 to 98 mole % of ethylene terephthalate through a spinneret and taking up the extruded filaments at a take-up speed of not less than 5,000 m/min.

Abstract: This invention relates to the production of polymer-coated, finely divided polyisocyanates by mixing(A) solid, finely divided polyisocyanates (preferably dimeric diisocyanates or urea diisocyanates) with(B) polyisocyanates differing in composition from those mentioned under (A) (preferably (cyclo) aliphatic polyisocyanates, such as biuretized diisocyanates or trimers or NCO-prepolymers),in quantities of from 0.05 to 50 parts by weight, and preferably in quantities of from 0.2 to 25 parts by weight, of (B) per 100 parts by weight of (A). The solid polyisocyanate particles surface-modified by covering with polyisocyanates (B) and then reacted with(D) isocyanate-reactive compounds containing reactive hydrogen atoms or with compounds free from active hydrogen atoms which form polymers with isocyanates in sub-equivalent to substantially equivalent quantities (preferably 0.5 to 1.

Abstract: A process is disclosed for converting .alpha.,.omega.-bis(2,6-dimethylphenol)poly(2,6-dimethyl-1,4-phenylene oxide) ("PPO--2OH" for brevity), and the corresponding thiophenol-poly(phenylene sulfide) ("PPS--2SH"), by the oxidative copolymerization of 2,6-dimethylphenol (DMP) with 2,2'-di)4-hydroxy-3,5-dimethylphenyl propane ("TMBPA"), or, of 2,6-dimethylthiophenol (DMTP) with 2,2-di(4-thiol-3,5-dimethylthiophenyl propane ("TMBTPA") respectively. Specifically, a mixture of water-methanol or chlorobenzene-methanol is used as the medium in which the reaction of DMP with TMBPA is carried out. By using a particular range of ratios of DMP to TMBPA and different solvent mixtures, the molecular weight of the PPO--2OH is tailored to be in the range from about 1000 to about 5000.

Abstract: Disclosed is a process for producing di-amino-polyalkenyl ethers by reacting (a) one or more acyclic or heterocyclic amino compounds with (b) one or more polyalkenyl ether glycols or polyalkenyl amino ether alcohols, in the presence of a hydrogenation catalyst, at elevated temperatures and pressures.

Abstract: Optical lenses, particularly spectacle, contact and intra-ocular lenses manufactured from glass or plastic. The lenses are provided with a hydrophilic coating which is immobilized upon the lens to provide permanent lubricity and uniform wetting characteristics.

Abstract: Novel heat resistant polycarbonates are provided which are the polymerized reaction products of:(i) a carbonate precursor; and(ii) at least one dihydric phenol selected from dihydric phenols represented by the general formulae ##STR1## wherein: each R.sup.1 is independently selected from halogen radicals, monovalent hydrocarbon radicals, and monovalent hydrocarbonoxy radicals;each R.sup.2 is independently selected from halogen radicals, monovalent hydrocarbon radicals, and monovalent hydrocarbonoxy radicals;R.sup.4 and R.sup.5 are independently selected from monovalent hydrocarbon radicals;R.sup.3 is selected from hydrogen and monovalent hydrocarbon radicals, with the proviso that if R.sup.3 is a hydrogen radical than at least one of the monovalent hydrocarbon radicals represented by R.sup.4 and R.sup.5 contains at least two carbon atoms;R.sup.7 is selected from hydrogen and monovalent hydrocarbon radicals;R.sup.

Abstract: A non-catalytic process converts oligomers of polyarylene polyethers (PAPE) having a mol wt Mn in the range from 1000 to about 10,000 to difunctionalized oligomers so as, in the first instance, to provide a reactive double bond (for example, a vinylbenzyl group) at each end of the PAPE; and, in the second instance to provide a triple bond (benzylethynyl group) at each end of the PAPE. The solubility of intermediate bisphenolates of (i) a dihydric phenol, and of (ii) the PAPE oligomer in particular solvents which allow (a) water of reaction to be removed without being degraded, and (b) essentially complete end-capping of the oligomer chains with vinyl chain ends, are the keys to the novel process. The PAPE most preferably has a repeating unit which is the residuum of two dihydric phenols or thiophenols ("DHP") linked through a C.dbd.O, --S--S--, or --SO.sub.2 - group, or a Si or C atom, and/or ether O, or thioether S atoms.

Abstract: A silicone modified polyetherimide which contains a polyetherimide and a flow-modifying amount of a polyorganosiloxane. Modification of polyetherimides in accordance with this invention results in lower torsional forces and increased throughput rates in extrusion and injection molding operations.

Abstract: Polyetheroxy-substituted polyphosphazenes having reduced mono and polyetheroxy alkanol, alkali metal and halide contaminants that are suitable for use in making solid electrolytes are made by dissolving the impure polyphosphazene in an inert solvent (e.g. tetrahydrofuran) and mixing this solution with a cycloalkane (e.g. cyclohexane) to precipitate the polyetheroxy-substituted polyphosphazene with reduced etheroxy alkanol content. This can be dissolved in water and contacted with an anion exchange material to remove residual halide anions. The purified polyetheroxy-substituted polyphosphazene is then recovered by distilling off the water.

Abstract: The methyl chloride or dimethyl sulfate quaternary ammonium salt of 1-acryloyl-4-methyl piperazine and polymers thereof.

Abstract: A delivery system for implantation of fine particles in surgical procedures made of a collagen tube filled with the fine particles, the tube being made of a cast collagen film having holes in it larger than the size of the particles to allow cell migration. The system is particularly useful for alveolar ridge augmentation.

Abstract: The methyl chloride or dimethyl sulfate quaternary ammonium salt of 1-methacryloyl-4-methyl piperazine.