Abstract: Polyester resins, comprising the polymerized residues of dibasic acids and diols, dibasic anhydrides and diols, and the lower alkyl esters of dibasic acids and diols, are soluble up to 40% by weight of solids in 1,3-dioxacyclopentane, and blends of 1,3-dioxacyclopentane with other relatively nontoxic solvents.

Abstract: The present invention relates to a polyimide resin composition and products, especially storage stable polyimide pre-pregs, manufactured therefrom with improved processing properties comprising (A) the reaction product of a polyimide, an alkenylphenol or an alkenylphenol ether, and tribromophenyl-maleimide, (B) an ionic or free-radical polymerization catalyst and (C) phenothiazine derivatives.

Abstract: Provided is a silicone resin composition, which is curable at a temperature of not more than 270.degree. C., consisting essentially of a silicone ladder polymer expressed in the following general formula (I): ##STR1## where R.sup.1 to R.sup.4 represent hydrogen atoms or lower alkyl groups respectively, R.sup.5 and R.sup.6 represent aryl groups, alkyl groups or alkenyl groups with alkenyl groups occupying at least 2% of 2n groups R.sup.5 and R.sup.6, and n represents an integer of 5 to 1600, an organic solvent, and/or 0.2 to 20.0 percent by weight of a catalyst with respect to the silicone ladder polymer. This composition is cured at a temperature of not more than 270.degree. C., to form a thin film having excellent solvent resistance and heat resistance.

Abstract: A repositionable pressure-sensitive adhesive comprising from about 70% to about 99% solid, polymeric, acrylate, inherently tacky, infusible, solvent-insoluble, solvent-dispersible, elastomeric microspheres comprising at least one alkyl acrylate or alkyl methacrylate ester; and at least one polar monomer, and correspondingly, from about 30% to about 1% of a binder copolymer comprising an elastomeric polymeric backbone having pendant therefrom high Tg polymeric moieties.

Abstract: The thermoplastic molding compositions contain as essential componentsA) from 96 to 99.9% by weight of at least one polyamide,B) from 0.1 to 4% by weight of one or more dialkyl ketones of the general formula I ##STR1## where R and R' are each alkyl of from 10 to 30 carbon atoms, and also, based on the sum total of A) and B),C) from 0 to 40% by weight of an impact modifying rubber,D) from 0 to 60% by weight of fibrous or particulate fillers or a mixture thereof, andE) from 0 to 120% by weight of a modified polyphenylene ether.

Abstract: A resin composition for primer use is described, which contains a copolymer of (I) a radical-polymerizable olefin resin and (c) a monomer copolymerizable with said olefin resin (I) and containing an alkyl (meth)acrylate and/or a fluorine-containing unsaturated monomer as essential ingredients, said radical-polymerizable olefin resin (I) being a product of the reaction of (a) an olefin resin having at least one functional group per molecule with (b) a radical-polymerizable monomer having a functional group reactive to the functional group contained in said olefin resin (a).A primer composition is also described.

Abstract: A polyimide resin is prepared by polymerizing (A) a tetracarboxylic acid dianhydride component consisting essentially of 10 to 50 mol % of 2,2-bis(3,4-benzene-dicarboxylic anhydride)perfluoropropane and 90 to 50 mol % of pyromellitic dianhydride or similar acid dianhydride and (B) a diamine component consisting essentially of 10 to 80 mol % of a silicon diamine and 90 to 20 mol % of an ether diamine. The polyimide resin is dissolved in an organic solvent and blended with finely divided silica to form a composition which is useful for protecting semiconductor elements.

Abstract: There is provided a novel substantially anhydrous UV curable composition comprising a monomer and a solvent wherein the monomer is a multi-functional, non-oxygen inhibited polyacrylate and the solvent is a low volatility solvent containing at least 2 oxygenated functions which is substantially incorporated into the polymer during the curing step. There is also provided a method of curing such compositions which avoids the conventional drying step required heretofore.

Abstract: The present invention relates to pressure-sensitive adhesive compositions comprising tackified elastomeric copolymers or block copolymers, e.g., based upon styrene/isoprene, having a novel condensed phase structure wherein polymer branches occur along the polymer backbone, either at a predetermined location or at random locations. The invention also provides sheet materials coated with the adhesive compositions. The polymers of the present invention are made by a method which comprises the step of reacting under polymerization conditions, hydrocarbyl lithium initiator, at least one anionically polymerizable compound, and an organometallic-substituted styrene condensing agent. The reactants may be added simultaneously to produce a copolymer with polymer branch segments randomly located along the polymer backbone or sequentially to produce a copolymer with branches located at the same predetermined location along the polymer backbone.

Abstract: A melamine-formaldehyde detackifer having less than 0.15% free formaldehyde comprises a melamine-formaldehyde polymer detackifier to which has been added a formaldehyde scavenging agent comprising an effective amount of urea, and an enhancer selected from glyoxal and acetylacetone. The use of the low free formaldehyde detackifier is also described.

Abstract: The present invention relates to hydrogen silsesquioxane resin (H-resin) fractions derived from an extraction process using one or more fluids at, near or above their critical state. These fractions can comprise narrow molecular weight fractions with a dispersity less than about 3.0 or fractions useful for applying coatings on substrates. The invention also relates to a method of using these fractions for forming ceramic coatings on substrates.

Abstract: An oligomeric aromatic pigment dispersant is the reaction product of a diisocyanate and a diol or diamine. The oligomeric dispersant is comprised of at least 25 weight percent of a compound of the formula: ##STR1## wherein n is an integer of from 3 to 15, AR is a residual aromatic connecting group, DI is a residual organic connecting group, CAP is a capping moiety, and X is a residual connecting group selected from the group consisting of: ##STR2## The oligomeric aromatic dispersant has at least 3 aromatic "heads" and 2 aliphatic or rosin "tails".

Abstract: Disclosed is a ladder silicone oligomer composition which comprises [A] 100 weight parts of a ladder silicone oligomer containing 1 to 10 weight % of hydroxyl groups and 1 to 10 weight % of ethoxy groups, [B] 1 to 200 weight parts of at least one silicon-containing compound selected from (a) silicone oligomers and polymers having a number average molecular weight of 500 to 100,000, which are obtained by reacting a compound of the following formula (I): ##STR1## wherein R.sub.1 is lower alkyl or phenyl, and R.sub.2 is lower alkyl, with a compound of the following formula (II): ##STR2## wherein R.sub.3 is lower alkyl, or phenyl, and R.sub.4 is lower alkyl, the molar ratio of the compound (I) to the compound (II) being from 1/0.3 to 1/9, and (b) ethyl silicates having a silica content of 28.8 to 45 weight % and hydrolysis products thereof, and [C] an organic solvent. The ladder silicone oligomer composition is useful as a coating material and an adhesive.

Abstract: Copolyimides derived from the reaction product of 3,3'-6 F diamine or 4,4'-6 F diamine, at least one other diamine, and pyromellitic dianhydride can be rendered solvent soluble while at the same time exhibiting an improvement in both mechanical and electrical properties by the inclusion of at least one other dianhydride having a diaryl nucleus in the reaction media. Suitable such dianhydrides include bis (3,4 dicarboxy phenyl) ether dianhydride, 3,3'4,4' benzophenone tetracarboxylic dianhydride, 3,3',4,4' diphenyl tetracarboxylic acid dianhydride and 2,2 bis(3,4 dicarboxyphenyl) hexafluoropropane dianhydride (6F-DA). Such polyimides are soluble in common organic solvents such as methyl ethyl ketone or N-methyl pyrrolidone, and exhibit excellent film forming properties with improved mechanical and electrical properties as compared to the corresponding homopolyimides. They possess excellent heat stability (Tg's in excess of about 350.degree. C.

Abstract: There is provided a novel substantially anhydrous UV curable composition comprising a monomer and a solvent wherein the monomer is a multi-functional non-oxygen inhibited polyacrylate and the solvent is a low volatility solvent containing at least 2 oxygenated functions which is substantially incorporated into the polymer during the curing step. There is also provided a method of curing such compositions which avoids the conventional drying step required heretofore.

Abstract: Efflorescence phenomena on mineral substrates are prevented by coating the surface of the mineral substrates with aqueous polyacrylate dispersions and drying the coating, if necessary at elevated temperatures, by a process in which a mixture of(A) a dispersion of a copolymer of(a) (meth)acrylates of alkanols which are of 3 to 20 carbon atoms and have a tertiary CH group,(b) styrene, .alpha.-methylstyrene, methyl methacrylate, tert-butyl (meth)acrylate and/or (meth)acrylonitrile and(c) mono- and/or dicarboxylic acids of 3 to 5 carbon atoms and/or or their amides which may be substituted at the N atom by alkyl, and(B) an aromatic ketoneis used for the coating, and the coating is exposed to ultraviolet light.

Abstract: A primer composition which is particularly effective to strongly bond fluorosilicone rubbers to metal, plastics, fibers, and the like, comprising(A) 100 parts by weight of a polyorganosiloxane represented by formula (I): ##EQU1## wherein R.sup.1 represents a substituted or unsubstituted monovalent hydrocarbon group, 10 to 50 mol % of the hydrocarbon groups of R.sup.1 being perfluoroalkyl and 0.01 to 1.0 mol % of the hydrocarbon groups of R.sup.1 being vinyl, and a is a number of from 1.98 to 2.01, and which has a viscosity as measured at 25.degree. C. of 1,000,000 cSt or more;(B) 5 to 100 parts by weight of a silica filler;(C) 0.5 to 50 parts by weight of a compound represented by formula (II): ##STR1## wherein X represents an organosilicon-containing group or a hydrocarbon-containing group, R represents methyl or hydrogen, and n is an integer of 1 or larger; and(D) an organic solvent.

Abstract: Very thin polymer/MOC film, on the order of 500A to 1000A thick, is prepared by dissolving both the polymer and the MOC sequentially in the same solvent to obtain an emulsion consisting of a discontinuous phase of finite globules of the MOC solution dispersed in a continuous phase of the polymer solution, then partially evaporating the solvent from a layer of the emulsion, and finally subjecting the resultant polymer/MOC layer, while the solvent continues to evaporate, to a controlled treatment permitting attainment of a desired arrangement of the MOC phase in and throughout the film, depending on the specific film properties sought to be achieved, while the polymer crystallizes. The treatment may be a drawing operation or, if the metal component of the MOC is magnetic, the application of a magnetic field either parallel or perpendicular to the plane of the layer.

Abstract: Linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon are provided melt stability by the inclusion therein of barium acetylacetonate or titanium acetylacetonate.

Abstract: Moisture-hardening joint sealing compositions based on polyurethane prepolymers, swellable polymer powders, plasticizers and other auxiliaries have increased stability in storage when they contain C.sub.8 -C.sub.20 olefins as stabilizers.

Abstract: A coating composition for the protection of metallic and non-metallic substrates against corrosion, comprising a film-forming polymer; at least one particulate metallic pigment in an amount ranging from about 30% to about 60% by weight based on the total weight of the composition; an agent for control of electrical conductive characteristics having an oil absorption value of less than 20 (determined by ASTM standard D 281-84), the volumetric ratio of the control agent to the metallic pigment ranging from 0.7:1 to 1.25:1; an agent for control of rheological characteristics; and at least one solvent compatible with the polymer.

Abstract: High polymer content compositions, containing the neutralized salt of a carboxyl-containing polymer suspended in an organic medium, are made by neutralizing the carboxyl-containing polymer in the presence of a neutralizing agent and an equal quantity of already neutralized polymer in an organic medium. These compositions are useful as thickeners and emulsifiers for aqueous solutions.

Abstract: A pressure-adherent silicone elastomer composition comprising a homogeneous mixture of a silicone pressure sensitive adhesive composition, a crosslinkable silicone elastomer composition, and, optionally, a viscosity reducing agent. Specifically, the silicone pressure sensitive adhesive composition is a condensation product, having a plasticity of less than 200 mils, of a benzene-soluble resinous copolymer containing silicon-bonded hydroxyl radicals and consisting essentially of triorganosiloxy units of the formula R.sub.3 SiO.sub.1/2 and tetrafunctionalsiloxy units of the formula SiO.sub.4/2 in a ratio of about 0.6 to 0.9 triorganosiloxy units for each tetrafunctionalsiloxy unit present in the copolymer and a polydiorganosiloxane having a viscosity from 100 centipoise to 50,000 centipoise at 25.degree. C.

Abstract: Substantially fully imidized polyimidesiloxanes which are based on 6FDA and optionally also a mixture of a biphenyl tetracarboxylic dianhydride and a benzophenone tetracarboxylic dianhydride, are soluble in diglyme which gives them particular utility in the micro-electronics industry. The polymers are prepared from the mixture of dianhydrides, a difunctional siloxane monomer and an organic diamine. Diamines can be used to provide an asymmetrical structure in the polyimidesiloxane polymer chain. The polyimidesiloxane can be prepared with functional groups which render them directly curable. The polyimidesiloxanes can also be prepared with functional groups which when reacted with an unsaturated compound renders the polymers curable. The product of the invention can be used in the form of solutions in the micro-electronic industry. The polymers can also be used in wire and cable coating and to prepare films, fibers, and molded and extruded articles.

Abstract: The present invention relates to a grafted cellulose ester prepared by reacting a cellulose ester containing residual hydroxyl groups with an acrylic based compound and m-isopropenyl-.alpha.,.alpha.'-dimethylbenzyl isocyanate. The grafted cellulose ester is a urethane-containing product having pendant (meth)acrylate and .alpha.-methylstyrene moieties. The grafted cellulose ester is readily self-polymerizable in the presence of a photoinitiator upon exposure to ultraviolet radiation. It does not require the presence of vinyl monomers to become crosslinked. The grafted cellulose ester is useful as a protective/decorative coating for wood, metal, plastics, and other substrates.

Abstract: An essentially isocyanate-free polyurethane, polyurea, polyethylenic oligomer is disclosed which is unusually strong and elastic and which possesses improved solvent solubility. This oligomer is the reaction product of: (1) organic diisocyanate; (2) a stoichiometric deficiency of difunctional materials reactive therewith and consisting essentially of: (A) diol component selected from polycarbonate diol and polyoxyalkylene glycol, this diol component having a molecular weight of from 200 to 2000; (B) dihydric bisphenol-based alkylene oxide adduct containing from 2-6 alkylene groups per molecule; and (C) a diprimary diamine component selected from alkylene diamine and polyoxyalkylene diamine, this diamine component having a molecular weight of from about 60 to 800. Components (A) and (B) are present in a mole ratio of, from 1:1.5 to 1:5 and component (C) is present to supply from 5 to 30 equivalent percent of the total equivalents of component (2).

Abstract: (1) Curable bisimide resins comprise a mixture of(a) 5 to 95% of at least one bisimide of the general formula I ##STR1## in which B represents a divalent radical containing a carbon-carbon double bond and A is a divalent radical containing at least two carbon atoms and(b) 95 to 5% of a polyhydantoin polymer of formula II ##STR2## wherein R.sub.1 represents an aromatic hydrocarbon radical, R.sub.2 represents hydrogen or an alkyl group having 1 to 6 carbon atoms, R.sub.3 represents an aromatic hydrocarbon radical, an alkyl radical having 4 to 10 carbon atoms optionally interrupted by one or more oxygen or sulphur atoms, and X is an integer of from 20 to 5000.

Abstract: A coating composition comprising(A) a film-forming polymer having functional group(s) capable of reacting with the crosslinking agent (D) hereinafter referred to and cationic or anionic functional group(s),(B) a volatile organic liquid diluent in which the polymer (A) is dissolved,(C) crosslinked polymer microparticles bearing anionic or cationic functional group(s) whose electric charge is opposite to that of the film-forming polymer, which are insoluble in the combination of the film-forming polymer (A) and the diluent (B) and are maintained in a stabilized state of dispersion therein, and(D) a crosslinking agent dissolved in the diluent (B).

Abstract: Organopolysiloxane compositions comprising a polyhydroxylated polysiloxane and a polyacyloxysilane, whether in single- or two-component form, rapidly cure into elastomeric state (and are thus useful, e.g., as sealing materials) in the presence of a 2-carboxycarboxamide cure autoaccelerator.

Abstract: Cohesive bonding between silicone rubber compositions and plastics is achieved using primer compositions comprising a solution of at least one member of a specified class of organotitanate esters in an organic liquid. Cohesive bonding of silicone rubber compositions to both plastic and metals is achieved by including at least one member from either of two specified classes of organosilicon compounds in the primer composition together with the organotitanate ester.

Abstract: The adhesion of organopolysiloxane compositions curable by a platinum catalyzed hydrosilation reaction to various substrates, particularly plastics, is improved by the presence in said compositions of (1) an organosilicon compound containing an ethylenically unsaturated group and at least one alkoxy group and (2) at least one member from a specified class of compounds of aluminum or zirconium.

Abstract: A thermoplastic composition is provided which comprises an aromatic polysulfone with an effective amount of an alpha-hydroxyketone such as benzoin to prevent discoloration on thermal processing.

Abstract: A thermoplastic composition is provided which comprises a polyimide with an effective amount of an alpha-hydroxyketone such as benzoin to prevent discoloration on thermal processing.

Abstract: An aqueous dispersion of a vinyl copolymer resin is prepared by polymerizing 1 to 15 parts by weight of a polyoxyethylene-containing hydrophilic polymerizable vinyl monomer of which polyoxyethylene moiety has an average molecular weight of 2,000 to 10,000, 99 to 85 parts by weight of at least one specific polymerizable vinyl monomer and 0 to 5 parts by weight of alpha, beta-unsaturated carboxylic acids, salts thereof or anhydrides thereof in an organic solvent, and dispersing the resulting vinyl copolymer resin solution in water.

Abstract: Combustion-resistant heat-curable compositions comprising:(a) an aminoorganopolysiloxane polymer containing an average of at least one hydrogen atom bonded to nitrogen in at least two of the silicon-bonded primary or secondary aminoorgano groups;(b) the reaction product of an organic polyisocyanate and a compound containing at least one alcoholic, phenolic, silanic or oximyl hydroxyl group or thiol group as a curing agent; and(c) a combustion inhibiting amount of an additive selected from the group consisting of:(i) a chromium compound;(ii) an iridium compound;(iii) a molybdenum compound;(iv) a rhodium compound;(v) a mixture of (I) platinum or a platinum compound and (II) a compound selected from the group consisting of a barium compound, a bismuth compound, a boron compound, a calcium compound, a chromium compound, a cobalt compound, a gallium compound, an iridium compound, a magnesium compound, a manganese compound, a molybdenum compound, a nickel compound, a palladium compound, a rhodium compound, a thoriu

Abstract: Elastomer/filler interface agents for filled vulcanizable matrices, e.g., natural or synthetic rubber, comprise the amido reaction products of tetraethylene pentamine ("TEPA") with amide-forming organosulfur compounds.

Abstract: A fluoroolefin copolymer having an inherent viscosity of from 0.05 to 2.0 dl/g and composed of(I) 10 to 70 mole % of monomeric units derived from a fluoroolefin represented by the general formula ##STR1## wherein X is H, Cl, F, CF.sub.3, OCF.sub.3 or OC.sub.3 F.sub.7, (II) 5 to 60 mole % of monomeric units derived from a vinyl carboxylate represented by the general formula ##STR2## wherein R.sub.1 represents an aliphatic, aromatic or alicyclic hydrocarbon group having 1 to 17 carbon atoms,(III) 5 to 70 mole % of monomeric units derived from a vinyl ether having an alkyl group with 1 to 8 carbon atoms, and(IV) 0 to 30 mole % of monomeric units derived from a hydroxyl-containing vinyl ether represented by the general formula ##STR3## wherein R.sub.2 represents an alkylene group having 1 to 6 carbon atoms.

Abstract: Stabilized polyvinyl chloride molding compositions contain, per 100 parts by weight of polymer, 0.02 to 5 parts by weight compounds of Formula I, ##STR1## in which R represents an alkyl group with 1 to 19 carbon atoms, a cycloalkyl group with 5 or 6 carbon atoms, a phenyl group, an alkylphenyl group with 7 to 11 carbon atoms or an MOOC--CH.sub.2 group, n represents the numbers 0 and 1, and M represents sodium or potassium.Heat stabilizers which are metal soaps, aromatic metal carboxylates, metal phenolates and organotin compounds as well as crystalline sodium aluminosilicate are also incorporated.

Abstract: A process for increasing the viscosity of a hydrocarbon liquid having a viscosity of at least about 10 cP which includes the steps of:(a) forming a first solution of an organic hydrocarbon liquid and a hydrolyzed Ziegler-Natta ester containing copolymer of an alpha-olefin and a vinyl alkylenecarboxylic acid having an acid content of from about 0.01 to 10 mole percent and a molecular weight of about 100,000 to about 10,000,000, wherein said copolymer of said alpha-olefin and said vinyl alkylenecarboxylic acid has the formula: ##STR1## wherein Z is a mixture of H and an alkyl group having about 1 to about 25 carbon atoms, wherein H comprises about 55 to about 99 mole % of Z, R.sub.1 is an alkyl group having about 1 to about 25 carbon atoms, R.sub.2 is an alkylene group having about 1 to about 17 carbon atoms, x is about 99.99 to about 95.0 mole %, more preferably about 99.95 to about 97.0 and most preferably about 99.90 to about 98.

Abstract: A graft-modified ultrahigh-molecular-weight polyethylene obtained by grafting (A) an ultrahigh-molecular-weight polyethylene having an inherent viscosity [.eta.], determined at 135.degree. C. in decalin, of at least 5 dl/g with (C) an unsaturated carboxylic acid graft-copolymerizable therewith or its graft-copolymerizable derivative, under melt-kneading condition in the presence of (B) an aliphatic compound having a melting point, determined by the DSC method, of at least 10.degree. C. and a boiling point of at least 130.degree. C., an amount of the component (C) grafted in said graft-modified ultrahigh-molecular-weight polyethylene being 0.01 to 10% by weight, and said graft-modified ultrahigh-molecular-weight polyethylene being substantially free of an insoluble gel product and having a tensile strength of at least 1.0 GPa; and a process for producing the same.

Abstract: Disclosed is a method of forming a slurry for casting into ceramic green sheets. Starting from selected quantities of a solvent, plasticizer, polymeric binder material, frit and aluminum oxide, a low viscosity pre-mix is formed by combining predetermined portions of the solvent and binder material and all of the plasticizer. The remaining portions of the solvent and binder material are combined into a post-mix. Next, the pre-mix and frit are milled in a ball mill. Then the aluminum oxide is added to the ball mill in steps using predetermined portions and milled for predetermined periods of time to achieve the desired degree of aluminum oxide deagglomeration and particle packing density. Finally, the post-mix is added to the ball mill and milled to obtain the final slurry.

Abstract: An ink composition for use in ink jet printing to print images on a substrate, the composition being formulated to include, as the resin component, a styrene-acrylic acid copolymer having a molar ratio of styrene to acrylic acid ranging from about 1 to about 4, a soluble dye, a solvent system including a lower alkanol and a lower aliphatic ketone, and, optionally, an evaporation retardant. The composition of the invention has a pH in the range of 1 to about 7 and contains less than about 5% water for use in printing on a variety of substrates.

Abstract: A method is presented for using scented oils to provide odor to a container of a product having a constituent incompatible with the scented oils. An aqueous emulsion which comprises from about 4% to about 70% of a water-emulsifiable or water-soluble polymer, from about 5% to about 80% of scented oils, and from about 6% to about 80% of water is prepared. The aqueous emulsion is dried whereby the scented oils are entrapped within the matrix of the polymer. The polymer matrix is included in the container with the product whereby the scented oils are protected by the polymer matrix from degradation by the incompatible constituent and diffuse from the polymer matrix over a period of time.

Abstract: A silicone-type coating resin solution and a process for preparing the solution. This solution comprises 30 to 60 parts by weight of a hydrolytic condensation polymer of tetramethoxysilane or tetraethoxysilane (PDAS) having a weight average molecular weight of 1,000 to 6,000 and 70 to 40 parts by weight of a polysilsesquioxane prepolymer (PLOS) having a weight average molecular weight of 2,500 to 7,000 and in which each of 5 to 50 mole % of the organic groups attached directly to the silicon atoms is a phenyl group and the remaining organic groups are methyl, ethyl, or vinyl groups, these polymer components being dissolved in an organic solvent having a boiling point of not less than 110.degree. C. under a pressure of 760 mmHg. This solution is prepared by dissolving PDAS and PLOS in an organic solvent having a high boiling point and treating the resultant solution under a reduced pressure of not more than 5 mmHg.

Abstract: A non-leaching coating composition useful in preventing fouling of marine structures submerged in water which composition is prepared as a single component composition by comingling a polyol reactive organic polyisocyanate, a hydroxy functional acylic polymer, and an organotin polymer in the presence of a reactivity suppressant solvent medium comprising a mixture of low molecular weight ketones and hydroxy-functional ether or low molecular weight aliphatic alcohol compounds.

Abstract: The present invention relates to a process for the viscosification of an organic liquid which comprises the steps of forming a first solution of an anionic polymer dissolved in the organic liquid; forming a second solution of a cationic polymer dissolved in the organic liquid; and mixing the first and the second solutions together to form an interpolymer complex of the anionic and cationic polymer in the organic liquid, wherein the organic liquid containing the interpolymer complex has improved viscosification properties. This solution possesses higher viscosity than the mean of the separate viscosities of the starting solutions at relatively low solids content. Moreover, these interpolymer complexes, in hydrocarbon solutions, can be formulated to exhibit shear thickening at increased shear rates. This property is useful in such technological applications as antimisting of the solvent.

Abstract: A process for the preparation of high molecular weight polyphenylene ethers from alkyl-substituted monohydric phenols by an oxidative coupling reaction with oxygen in the presence of a catalyst complex of a copper salt and an organic amine, subsequent stopping of the reaction and removal of the metal component of the catalyst by addition of chelating and/or salt-forming agents, wherein the polymer solution is treated with a compound having the general structure: ##STR1## where R.sup.2 and R.sup.3 can be identical or different and each is OH, NH.sub.2, NHR.sup.5, where R.sup.5 is alkyl or cycloalkyl, or SH, and where R.sup.1 and R.sup.4 are identical or different, being hydrogen, alkyl, cycloalkyl, aryl, carbonyl, carboxyl, carboxyalkyl or nitrile, and can be linked to form a ring, advantageously in an amount of from 0.1 to 100 mmoles and advantageously in from 1 to 20% strength aqueous solutions.

Abstract: A migration-free size for glass fibers which includes a silane coupler, lubricant and film former and is characterized by the absence of a carrier, either aqueous or organic. To provide required shelf-life, a volatile agent such as acetone is added in limited amount to block coupler-film former reaction pending use of the size.

Abstract: A polyamide acid composition for preparing a polyimide which can extend the pot life of the composition comprising a solution of a polyamide acid in an organic solvent, the polyamide acid being a precursor of the polyimide, a dehydrating agent, a catalyst and a pot life extending agent which can lower a rate of conversion of the polyamide acid to the polyimide, and the process for preparing the polyimide from said polyamide acid composition. According to the present invention the pot life can be extremely extended to give the composition an enough flowability for a long time without reducing the excellent properties such as a heat resistance and an electric insulation of the obtained polyimide.

Abstract: The malodor in polymers based on thiodiethanol and elastomers produced therefrom is reduced by the incorporation of various metal salts of Group IB, IIB or VIII of the Periodic Table therein.