Abstract: Ophthalmic preparation for use as artificial tear containing hyaluronate as a viscosity thickener, preferably in the form of sodic salt and having a molecular weight of 500,000 to 4,000,000 daltons, at a concentration of 0.05 to 2% by weight, as well as the following minimum quantities of ionic species: 40 mmol/l sodium ion, 12 mmol/l potassium ion, 0.4 mmol/l calcium ion, 0.4 mmol/l magnesium ion, 50 mmol/l chloride ion, 7 mmol/l phosphate ion and, preferably, 0.7 mmol/l citrate ion. The formulation, which as an osmolarity of 140 to 280 mOsm/l, is useful for the treatment of keratoconjunctivitis sicca and may be administered whenever the use of artifical tears is advisable, e.g. for the treatment of eye irritations caused by environmental conditions or contact lenses.

Abstract: A resin composition containing (A) an amorphous polyolefin resin and (B) a block copolymer comprising a polymer block of an aromatic vinyl compound and an isobutylene polymer block, at an (A)/(B) weight ratio within a range of 95/5 to 50/50, has remarkably improved impact resistance, with no deterioration of the excellent properties essential to the amorphous polyolefin resin (A), such as transparency.

Abstract: A wood article is submitted to a vacuum in an autoclave to remove air that it contains. Then, a solution which contains a wood preservative, a water-soluble cross-linkable prepolymer and a polymerization initiator is introduced into the autoclave. Polymerization to form a polymeric network in the wood article is carried out in an atmosphere substantially free of oxygen, while the preservative is chemically fixed to the wood. The result is a wood article with a permanently reduced hardness and an increased moisture content at equilibrium.

Abstract: A carbocationic catalyst composition comprising an initiator of water, a tertiary alkyl or aralkyl halide, ester, ether, carboxylic acid, acid halide or a polymeric halide, a co-initiator of organometal alkoxide halides, organometal phenoxide halides and/or organometal carboxyl halides is used to produce polymers particularly polyisobutylene and isobutylene/para-methyl-styrene copolymers.

Abstract: A low viscosity adhesive composition which comprises:(a) an asymmetric radial block copolymer of a vinyl aromatic hydrocarbon and at least one conjugated diene having from 3 to 6 polymer arms, which:(i) contains from 33 to 85% by weight of polyvinyl aromatic hydrocarbon block/polydiene block copolymer arms and the balance polydiene homopolymer arms,(ii) has vinyl aromatic hydrocarbon blocks with block molecular weights of from 8000 to 30,000,(iii) has conjugated diene blocks in the copolymer arms with a molecular weight of at least 6000, and(iv) has a polyvinyl aromatic hydrocarbon content of from 10 to 40% by weight; and(b) from 20 to 400 parts per hundred parts of polymer of a tackifying resin.The invention also encompasses the polymers used in the adhesive.

Abstract: Copolymers are prepared from monoethylenically unsaturated monomers containing acid groups and N-vinyllactams and, if required, other monoethylenically unsaturated monomers by copolymerization of monomers in the presence of free radical polymerization initiators by a solution polymerization method in water at a pH of at least 6, by a process in which an alkali metal base or an alkaline earth metal base or a mixture thereof is used for establishing the pH of the aqueous reaction solution.

Abstract: The invention relates to a method of manufacturing monodisperse poly(meth)acrylates by the method of precipitation polymerization, comprising polymerizingi) a monomer mixture comprising at least 60 wt. % of monomer of formula I ##STR1## where R represents hydrogen or methyl; andR.sub.1 represents a C.sub.1-8 alkyl group, a C.sub.6-24 aryl group, a C.sub.1-8 alkyl substituted aryl group or an aralkyl group;ii) 0.1-10 wt. % based on the weight of the monomer mixture of a block copolymer having polystyrene components; andiii) 0.02-2 wt. % based on the weight of the monomer mixture of a percarbonic acid ester;in a halogen free solvent comprising 70 to 100 wt. % of cyclohexane.

Abstract: A mixed bisimide having the formula: ##STR1## wherein D, A and Z are as defined in the specification, produced by reacting a diamine with an ethylenically unsaturated dicarboxylic acid anhydride and a halogenated compound containing an anhydride group and aromatic or bicyclo groups to form a bisamic acid composition and then dehydrating such composition to ring close the end groups. The halogenated end groups (Z) of the mixed bisimide component render the bisimide reaction product of the ring closing reaction flame retardant.

Abstract: A procedure is described for the preparation of colorless hydrocarbon resins having a higher thermal stability than similar products in the known art. The procedure involves the treatment of polymeric mixtures deriving from the (co)polymerization by means of Friedel-Crafts catalysts of hydrocarbons or mixtures of ethylenically unsaturated hydrocarbons, with an organometallic compound of Magnesium and/or Lithium, the separation of the inorganic residues and the final removal of the volatile organic products.

Abstract: An aqueous emulsion of a resin which contains a fluorescent dye comprising:______________________________________ INGREDIENTS % BY WEIGHT ______________________________________ A water insoluble 25-50 tetra polymer Fluorescent Dye .1-10 Anionic Emulsifier .2-10 Water Balance ______________________________________with the tetra polymer comprising: ______________________________________ INGREDIENTS % BY WEIGHT ______________________________________ A. A water insoluble vinyl 52-65 monomer free of polar groups. B. Acrylonitrile 25-35 C. A vinyl monomer containing 1.5-4.5 sulfonate groups. D. A polar vinyl 5-15 monomer from the group con- sisting of: 1. Polar acrylate esters 2. Vinyl acetate 3.

Abstract: A copolymer is manufactured by allowing ethylene (A) and vinyl compounds (B) represented by the following general formula to undergo radical polymerization at a pressure of 1000-5000 kg/cm.sup.2 and a temperature of 100.degree.-400.degree. C., ##STR1## wherein R.sub.1 and R.sub.2 are each an independent hydrogen atom or a methyl group, R.sub.3 is a hydrogen atom or an alkyl group of 1-4 carbon atoms; a ratio of (B) to the sum of (A) and (B) is less than 1 mol %; a proportion of the amount of vinyl compounds (B), which are not successively bonded at all to the units (B) in the chain, but bonded to unlike units (A) on both sides thereof, to the total amount of (B) units in the copolymer is at least a 83%; and an MFR of the copolymer ranges from 0.1 to 200 g/10 min.Although the copolymer contains only a small amount of the vinyl compound (B) it nevertheless has excellent photo stabilizing effects.

Abstract: The present disclosure is directed to a catalyst comprising the reaction product of:(a) a silicon-containing compound having the structural formula R.sub.4--n SiX.sub.n --where R is C.sub.1 -C.sub.10 hydrocarbyl; X is halogen; and n is an integer of 1 to 4;(b) a magnesiumdialkyl having the structural formula R.sup.1 R.sup.2 Mg, where R.sup.1 and R.sup.2 are the same or different and are C.sub.2 -C.sub.10 alkyl;(c) an alcohol having the structural formula R.sup.3 OH, where R.sup.3 is C.sub.1 -C.sub.10 hydrocarbyl;(d) a halide-containing metal compound, said metal selected from the group consisting of titanium, zirconium and vanadium;(e) an aluminum alkoxide having the structural formual Al(OR.sup.5).sub.3, where R.sup.5 is C.sub.2 -C.sub.

Abstract: Aqueous formulations suitable as sealing compounds or adhesives for ceramic tiles essentially containA) from 3 to 30% by weight of plastics particles which consist ofa) from 0.1 to 4% by weight of one or more mercaptosilanes of the general formula I ##STR1## where n is from 1 to 8, R.sup.1 and R.sup.2 are hydrogen and/or C.sub.1 -C.sub.4 -alkyl, R.sup.3, R.sup.4 and R.sup.5 are C.sub.1 -C.sub.6 -alkyl and/or C.sub.1 -C.sub.6 -alkoxy, with the proviso that one or more of the radicals R.sup.3 to R.sup.5 is alkoxy, andb) ethylenically unsaturated monomers capable of undergoing free radical polymerization, as the residual amount,the polymer having a glass transition temperature of from -60 to +40.degree. C.,B) from 40 to 90% by weight of an inorganic filler,C) an effective amount of an emulsifier,D) from 0 to 15% by weight external plasticizer andE) from 5 to 40% by weight of water.

Abstract: A class of benzocyclobutene/bisimide copolymers having superior toughness are disclosed. The copolymers are derived from bisbenzocyclobutene monomers by one of structures ##STR1## in which R is selected from unsubstituted and non-electrophilic substituted phenylene, naphthalenediyl and ##STR2## X is selected from oxygen, sulfur, nitrogen, --CH.sub.2 -- and --C(CH.sub.3).sub.2 --; and X' is selected from O, S, N and --CH.sub.2 --. Also disclosed is a method for preparing a bisbenzocyclobutene/bisimide copolymer having a Tg greater than 200.degree. C. and a Mode I fracture toughness greater than 2 MPa.m.sup.1/2.

Abstract: A coating composition for a cast-coated paper which principally comprises a pigment and an adhesive and in which the adhesive is composed of (A) a rubber latex having an average particle size of 0.1 to 0.3 micron and (B) a rubber latex or an acrylic emulsion having an average particle size of 0.5 to 1.5 micron and the sum of the solid content of the components (A) and (B) is in the range of 9 to 30 parts by weight per 100 parts by weight of the pigment is herein provided. The coating composition may further contain casein as a binder. In addition, inorganic compounds selected from NaCl, Na.sub.2 SO.sub.4, ZnO and MgO and organic acid salts selected from formates or acetates of Ca, Zn, Mg may be added to the coating composition as coagulants. The use of the aforesaid coating composition makes it possible to produce cast-coated paper having excellent permeability, gloss and surface strength at a high speed.

Abstract: A process for the preparation of perfluoropolymer by the random interpolymerization of tetrafluoroethylene, perfluoro (alkyl vinyl) ether and bromo curesite reactant, and the improvement wherein the interpolymerization reactants further comprise compounds of the formula RI.sub.n, in which R is a hydrocarbon or halocarbon radical and n is 1 or 2.

Abstract: Plastisols of 80 to 5% by weight plasticizer and 20 to 95% by weight particulate polymer containing(a) from 5 to 60% by weight acrylonitrile, methacrylonitrile or mixture thereof(b) from 15 to 95% by weight styrene, .alpha.-methyl styrene or mixture thereof(c) from 0 to 10% by weight of a carboxylic acid copolymerizable with the monomers (a) and (b),(d) from 0 to 30% by weight and, in the absence of component (c), from 10 to 30% by weight of an alkylester of acrylic acid, methacrylic acid or mixtures thereofoptionally a diluent and other constituents, the percentages by weight of plasticizer and polymer being based on the sum of plasticizer and polymer and a process for making such plastisols.

Abstract: The invention relates to a process for preparing anion exchangers based on crosslinked, water-insoluble organic polymers containing aromatic nuclei, in which, in the first step, N-hydroxymethylphthalimide is produced by reaction of phthalimide with aqueous formaldehyde solution in swelling agents in the presence of bases; if desired, this N-hydroxymethylphthalimide is converted in a 2nd step to the bis)phthalimidomethyl)ether or an ester of N-hydroxymethylphthalimide; said polymers are aminomethylated wtih N-hydroxy-methylphthalimide, bis)phthalimidomethyl) ether or an ester of N-hydroxymethylphthalimide in the presence of Friedel-Craft catalysts and swelling agents and the amidomethylated polymers are finally saponified to form the aminomethylated polymers, wherein, in the first reaction step, the base used for producing N-hy-droxymethylphthalimide is sodium hydroxide solution and this sodium hydroxide solution is added in such an amount and at such a rate that the reaction of phthalimide with formaldehyde t

Abstract: Ambient curing coating compositions are made from aqueous dispersions of copolymers of acetoacetoxyethyl acrylate or methacrylate, glycidyl arcylate or methacrylate, and ethylenically unsaturated polymerizable acid and a different monomer copolymerizable therewith.

Abstract: A method for the production of new derivatives of watersoluble cellulose ethers by the reaction of 100 parts by weight of a water-soluble cellulose ether with 3 to 30 parts by weight of C.sub.8-18 alkyl(ene) succinic acid anhydride, in the absence of water and under neutral or acid conditions at elevated temperature, until, in analytically detectable terms, 1 to 8% by weight, based on the cellulose ether, of alk(en)yl succinic acid has reacted with the cellulose molecule; the products of the method; and their use as thickners for aqueous surfactant solutions, dye dispersions, and for hydraulically setting building materials or their use as protective colloids or emulsifiers in the suspension polymerization of water-insoluble monomers in aqueous phase.