Abstract: The invention relates to a new process for the preparation of precipitated silica which has a very good dispersibility and very satisfactory reinforcing properties. It also relates to new precipitated silicas which are in the form of powder, of substantially spherical beads or of granules, these silicas being characterized by the fact that they have a CTAB specific surface of between 100 and 240 m.sup.2 /g, a DOP oil uptake lower than 300 ml/100 g, a pore distribution such that the pore volume consisting of the pores whose diameter is between 175 and 275 .ANG. represents less than 50% of the pore volume consisting of the pores of diameters which are smaller than or equal to 400 .ANG., a median diameter, after disintegration with ultrasound, smaller than 5 .mu.m and an aluminium content of at least 0.35% by weight. The invention also relates to the use of the said silicas as reinforcing fillers for elastomers.

Abstract: A composition of matter comprising:(a) about 60 to about 99 parts by weight of a curable epoxypolyorganosiloxane;(b) about 1 to about 40 parts by weight of a crosslinkable silicone hydride resin having no epoxy functionality; and(c) about 0.1 to about 5 parts by weight of an curing agent, which, upon exposure to actinic radiation is capable of curing components (a) and (b);wherein the total amount of components (a) and (b) is 100 parts by weight and wherein said composition demonstrates surface release properties when coated and cured onto a substrate is provided. The composition is particularly useful in articles of manufacture where release properties are desired.

Abstract: The subject of the present invention is a composition comprising:at least one masked or unmasked polyisocyanate in the form of an aqueous emulsion whose mean size is between 0.1 and 10 micrometres and preferably smaller than 2 and larger than 0.2 micrometres,at least one polyhydroxylated polymer, advantageously a polyol, in the form of a second aqueous dispersion whose mean size is between 10 and 200 nanometres.This composition is defined in that the quantity of polyol in the mixture is chosen so as to meet one of the following two constraints:the polyol content, expressed in mass percent, is at least equal to 35-0.75R, advantageously at least equal to 40-0.75R, preferably to 45-0.75R;the polyol content, expressed in mass percent, does not exceed 45-2R, advantageously does not exceed 40-2R, preferably 35-2Rwith R equal to the ratio of the mean size (d.sub.50) of the emulsion to that of the polyol dispersion.Application to organic synthesis.

Abstract: A composition comprising:(a) a naturally occurring or synthetic latex; and(b) a thickening agent comprising one or more polysaccharides;wherein said thickening agent is present in an amount of between about 0.01 to about 15 parts per 100 parts of polymer in said naturally occurring or synthetic latex and wherein said polysaccharide does not solely comprise a starch or cellulose derivative.

Abstract: The invention relates to a new process for the preparation of precipitated silica which has a good dispersibility and very satisfactory reinforcing properties. It also relates to new precipitated silicas which are in the form of powder, of substantially spherical beads or of granules, these silicas being characterized by the fact that they have a CTAB specific surface of between 90 and 250 m.sup.2 /g, a DOP oil uptake lower than 300 ml/100 g, a pore distribution such that the pore volume consisting of the pores whose diameter is between 175 and 275 .ANG. represents less than 50% of the pore volume consisting of the pores of diameters smaller than or equal to 400 .ANG., a zinc content of between 1 and 5% by weight and by the fact that the number N of molecules of stearic acid consumed per nm.sup.2 of silica surface, when stearic acid is reacted with the said silica in xylene for 2 hours at 120.degree. C., is at least 1.

Abstract: A baking mix for preparing an edible baked good including a leavening acid comprising the product produced by heating monocalcium phosphate at an elevated temperature for a suitable period of time so that the weight of the resulting leavening acid composition is between 83 to 93 percent of the weight prior to heating is provided.

Abstract: This invention relates to the deinking process for office wastepaper for utilization in a neutral medium. Particularly the invention relates to a deinking process for office wastepaper comprising the steps of: (a) converting wastepaper to pulp; (b) contacting the pulp with a deinking agent comprising of: i) an enzyme active at a pH of from about 4 to about 9 and ii) a nonionic surfactant selected from the group consisting of higher aliphatic alcohol alkoxylates, aliphatic acid alkoxylates, higher aromatic alcohol alkoxylates, fatty acid amides of alkanolamines, fatty acid amide alkoxylates, propylene glycol alkoxylates, block or random copolymers of ethylene and propylene oxide, higher alcohol polyethylene polypropylene block or random adducts and mixtures thereof; in an aqueous medium having a pH of from about 4 to about 9; and (c) removing ink from the pulp by flotation, water washing or a combination of flotation and water washing.

Abstract: This invention relates to the deinking process for office wastepaper for utilization in a neutral medium. Particularly the invention relates to a deinking process for office wastepaper comprising the steps of: (a) converting wastepaper to pulp; (b) contacting the pulp with a deinking agent comprising of: i) an enzyme active at a pH of from about 4 to about 9 and ii) a nonionic surfactant selected from the group consisting of higher aliphatic alcohol alkoxylates, aliphatic acid alkoxylates, higher aromatic alcohol alkoxylates, fatty acid amides of alkanolamines, fatty acid amide alkoxylates, propylene glycol alkoxylates, block or random copolymers of ethylene and propylene oxide, higher alcohol polyethylene polypropylene block or random adducts and mixtures thereof; in an aqueous medium having a pH of from about 4 to about 9; and (c) removing ink from the pulp by flotation, water washing or a combination of flotation and water washing.

Abstract: The invention relates to a new process for the preparation of precipitated silica which has an excellent dispersibility and very satisfactory reinforcing properties. It also relates to new precipitated silicas which are in the form of powder, of substantially spherical beads or of granules, these silicas being characterized by the fact that they have a CTAB specific surface of between 140 and 200 m.sup.2 /g, a BET specific surface of between 140 and 200 m.sup.2 /g, a DOP oil uptake lower than 300 ml/100 g, a median diameter, after disintegration with ultrasound, smaller than 3 .mu.m, an ultrasonic disintegration factor higher than 10 ml and an aluminium content of at least 0.35% by weight. The invention also relates to the use of the said silicas as reinforcing fillers for elastomers.

Abstract: A solid composition of matter comprising one or more polysaccharides which has a coarse particle size is provided. The composition demonstrates absorbent properties and is useful in absorbent articles of manufacture. Also provided is a method for preparing the compositions.

Abstract: The present invention relates to linear, cyclic or branched polyorganosiloxanes having, per molecule, at least three siloxy units, including at least one functional unit of formula: ##EQU1## where R.sup.1 represents a C.sub.1 to C.sub.4 alkyl or phenyl radical and X contains a secondary or tertiary cyclic amine functional group bonded to the silicon via an Si--A--C bond where A is a residue comprising a cyclic acetal group. X more specifically represents a monovalent group of formula: ##STR1## The present invention also relates to the use of such polyorganosiloxanes in polymers for improving in particular their photostabilization.

Abstract: The invention relates to a process for the preparation of polyorganosiloxanes by hydrolysis of organohalosilanes of formula (I) R.sub.a R.sup.1.sub.b SiX.sub.c, wherein R and R.sup.1 identical or different, are an hydrogen atom or a linear or branched C.sub.1 -C.sub.6 alkyl, aryl, alkylaryl or aralkyl group; X is a halogen atom; and a+b+c=4 and 0<c<4; said process comprising the steps of carrying out three or more successive hydrolysis steps (1), (2), (3), in which the reaction medium is capable of exerting an increasing hydrolysing force on the organohalosilanes (I), wherein step (1) is a hydrolysis under pressure in the presence of an aqueous solution S.sub.1 of saturated hydrogen halide, at the pressure and temperature of the reaction medium; and, optionally, carrying out one or more coalescence step (4).

Abstract: Novel aqueous thickener or thixotropic polymers are prepared by the copolymerization of (A) about 15-60 weight percent of a C.sub.3 -C.sub.8 alpha, beta-ethylenically unsaturated carboxylic acid monomer, preferably acrylic or methacrylic acid or a mixture thereof with itaconic or fumaric acid, (B) about 15-80 weight percent of a nonionic copolymerizable C.sub.2 -C.sub.12 alpha, beta-ethylenically unsaturated monomer, preferably a monovinyl ester such as ethyl acrylate or a mixture thereof with styrene, acrylonitrile, vinyl chloride or vinyl acetate, and (C) about 1-30 weight percent of a new and novel nonionic ethylenically unsaturated nonionic biphillic monomer such as tristyrylpoly(ethyleneoxy).sub.x methyl acrylate, to provide a stable aqueous colloidal dispersion at an acid pH lower than about 5.0 but becoming an effective thickener for aqueous systems upon adjustment to a pH of about 5.5-10.5 or higher. These polymers adjusted to a pH of about 5.

Abstract: Nonionic and cationic derivatized guar gum which demonstrates greater than 75% light transmission at a wavelength of from about 500-600 nanometers when dispersed in water in the amount of 0.5 parts per 100 parts water and the process for producing such guar gum is disclosed. The compositions are particularly useful for producing products having utility in personal care and industrial cleaning products.

Abstract: Imadazoline-based amphoacetates of higher purity, containing essentially negligible amounts of unalkylated amido amines, lower amounts of glycolic acid salts and monochloroacetate salts, superior to currently available conventional amphoacetates, are provided. This is demonstrated by their improved surface-active properties. Lower inherent irritation properties may be expected due to improved purity. The higher purity amphoacetates can be obtained via processes utilizing precise pH control during the reaction of imidazoline, or its open-chain derivatives, with alkylating agents, e.g. sodium monochloroacetate. The pH can be controlled by adding the base slowly or automatically in response to a pH metering device to maintain a constant pH, or by a series of staged additions which are calculated to maintain pH within a stated range. The reaction may also be carried out by conducting the initial hydrolysis of the imidazoline ring structure, followed by alkylation.

Abstract: The subject of the present invention is a composition comprising at least one masked or unmasked polyisocyanate in the form of an aqueous emulsion and at least one polyhydroxylated polymer, advantageously a polyol, in the form of a second aqueous dispersion. This composition is further defined in that the polyol content, expressed in mass per cent, is at least equal to 35-0.75 R and the polyol content, expressed in mass per cent, does not exceed 45-2 R with R equal to the ratio of the mean size (d.sub.50) of the emulsion to that of the polyol dispersion.

Abstract: The present invention relates to compounds composed essentially of a linear, cyclic or branched polyorganosiloxane having, per molecule, at least 3 siloxy units, including at least one siloxy functional unit of formula: ##STR1## where R.sup.1 represents a C.sub.1 to C.sub.4 alkyl or phenyl radical, X contains an N,N'-di- and/or trisubstituted phenylenediamine functional group, bonded to the silicon via an Si--(hydrocarbon linking unit)--N and/or Si--(hydrocarbon linking unit)--C bond, and a is a number chosen from 0, 1 and 2. The present invention also relates to the use of such compounds as antiozonants for rubbers and in particular for rubber compositions for tires.

Abstract: A detergent composition useful for cleaning and/or conditioning human hair or skin or cleaning dishes or clothing which contains NaCl or NH.sub.4 Cl and further contains a nonionically and cationically derivatized polygalactomannan, the molecular substitution of the nonionic substituent being between about 0.4 and about 1.2 and the degree of substitution of the cationic substituent being between about 0.20 to about 1.0, said detergent composition having a viscosity of greater than about 500 centipoises and said composition having greater than 75% light transmission at a wavelength of from about 500-600 nanometers is provided. Also disclosed is the use of an amphoteric and nonionic substituted derivatized polygalactomannan for such uses.

Abstract: A composition comprising a mixture of xanthan gum, a surfactant and a chelating salt, wherein said surfactant is present in an amount of from about 0.1% to about 3.0% by weight of the total weight of the composition, and wherein said chelating salt is present in an amount of from about 0.1% to about 3.0% by weight of the total weight of the composition is provided.