Abstract: There are provided aqueous emulsions useful for rendering porous substrates water repellent comprisinga) a hydrolyzable silane and/or siloxane, b) an organopolysiloxane resin consisting of R.sub.3 SiO.sub.0.5 siloxane units and SiO.sub.2 siloxane units, or R.sub.3 SiO.sub.0.5 units, R.sub.2 SiO units, and SiO.sub.2 siloxane units,c) a filler having a surface area of at least 40 m.sup.2 /g,d) an emulsifying agent, ande) water.Such compositions are especially useful on masonry exposed to wind-driven rain.

Abstract: A sealant or mastic composition comprises a dispersion of a finely divided particulate solid in a silicone resin formulation which contains a dispersant containing at least one group of the formula--(O--A--CO).sub.n --.The dispersant may be derived from a hydroxycarboxylic acid and preferably has a --COOH end group. The dispersant modifies the shear properties of the sealant.

Abstract: A silicone composition capable of being cured by both a moisture-curing mechanism and an ultraviolet (UV) curing mechanism is provided. The silicone composition comprises:1 a reactive organosiloxane prepared by a condensation reaction of a silicone (1) represented by the general formula ##STR1## where R.sup.1 and R.sup.2 are each an organo group, and a is a number corresponding to a kinematic viscosity of 25-50,000 cSt, measured at 25.degree. C., with a vinyl ether silane compound represented by the general formula: ##STR2## where m and n are each an integer of 1 to 5, R.sup.3 and R.sup.4 are each an alkyl group having 1 to 3 carbon atoms or allyl, and b is 0 or 1;2 0-70 parts by weight of a silicone oil having trimethylsilyl group as an end group;3 a catalytic amount of a photopolymerization catalyst; and4 a catalytic amount of a silicone moisture-curing catalyst.

Abstract: The present invention relates to a method for the continuous preparation of heat-vulcanizing silicone rubber compounds. The method comprises continuous feeding of (A) 100 weight parts polydiorganosiloxane gum, (B) 5 to 100 weight parts reinforcing filler, and (C) up to 30 weight parts processing aid to a co-rotating twin-screw continuous compounding extruder. The components (A), (B), and (C) are continuously mixed in the extruder at a temperature in a range of about 200.degree. C. to 300.degree. C. The mixed components are then discharged, forming an extrudate. The extrudate is fed continuously to a counter-rotating twin-screw continuous compounding extruder, wherein the extrudate is continuously heat-treated at a temperature in a range of 150.degree. C. to 300.degree. C., forming the silicone rubber compound, which is then discharged from the counter-rotating twin-screw continuous compounding extruder.

Abstract: A photocurable and moisture-curable silione composition comprising a reactive organosilane which has acryldialkoxysilyl or acryldiallyloxysilyl groups at both ends, a silicone oil, a photosensitizer and a moisture-curing catalyst.

Abstract: A silica-free, abrasion resistant and ultraviolet radiation resistant coating is disclosed comprising an organic UV absorbing compound such as hydroxybenzophenone in an inorganic oxide matrix formed by the hydrolysis and condensation of an organo alkoxysilane and a silicon other metal alkoxide.

Abstract: An addition-curable type organopolysiloxane composition having a volume resistivity of 10.sup.7 .OMEGA.cm or below, comprising (A) an organopolysiloxane having at least two alkenyl group in its molecule and a viscosity at 25.degree. C. of from 100 to 200,000 cSt, (B) an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms in its molecule, (C) a platinum group metal catalyst, (D) an organosilicon compound which has at least one silicon-bonded hydrogen atom in its molecule and in which at least one member selected from the group consisting of epoxy group-containing organic groups and alkoxy groups is attached to a silicon atom, and (E) an electrically conductive filler. This composition can be cured by an ultra high frequency heating system to form an adhesive cured product. It is therefore possible to obtain cured products with stable physical properties under constantly fixed conditions irrespective of the heat capacity of adherends.

Abstract: A process for insulating high voltage conducting media by insulating such media with a silicone rubber composition capable of being converted to a rubbery elastomer superior in high voltage electrical insulating characteristics is provided. The composition comprises the following components (a) to (e) and not containing a platinum catalayst:(a) 100 parts by weight of an organopolysiloxane gum;(b) 10-100 parts by weight of a finely divided silica filler;(c) 15-300 parts by weight of aluminum hydroxide;(d) 1-20 parts by weight of a OH terminated organosilane or organosiloxane oligomer; and(e) 0.05-6 parts by weight of an organic peroxide.

Abstract: The triorganosiloxydiphenylsilanols of the present invention are novel silicone compounds that are useful as plasticizers for silicone rubbers. The present invention also relates to a method for preparing these compounds in high yield and purity and a method for preparing filled curable organosiloxane compositions using the present compounds as plasticizers.

Abstract: Improved thermoplastic compositions characterized by high tensile elongation values are described. They comprise polyphenylene ether resin, a hydrogenated elastomeric block copolymer having an A-B-A' structure, with specific molecular weight values for the copolymer blocks and a phenylsiloxane fluid of particular composition. Electrical conductor articles which include polymerized thermoplastic compositions as mentioned above represent another embodiment of this invention.

Abstract: Hot-melt silicone pressure sensitive adhesive compositions containing alkylmethylsiloxane waxes and methods of using the compositions are disclosed. The hot-melt silicone pressure sensitive adhesive compositions include a mixture of (i) a silicate resin, (ii) a silicone fluid, and (iii) an alkylmethylsiloxane wax having a melting point of between 30.degree. C. and 70.degree. C. The alkylmethylsiloxane wax decreases dynamic viscosity of the adhesive compositions at temperatures ranging from about 50.degree. C. to about 200.degree. C.

Abstract: Silane polymer coating compositions which have excellent bonding properties for metallic surfaces and which make such surfaces highly resistant to corrosion. The compositions are formed by anhydrously reacting an epoxy trialkoxy silane with a primary amino trialkoxy silane in a stoichiometric molar ratio which provides one epoxy group for reaction with each primary amino hydrogen site to form the silane polymer coating composition. The composition is applied to the metal surface, and is hydrolyzed and dehydrated in situ to crosslink thereon and bond to the surface to form the corrosion-resistant coating.

Abstract: A silicone rubber composition comprising(A) 100 parts by weight of a polyorganosiloxane having, per molecule, at least two structural units represented by the following formula:(R.sup.1).sub.a (R.sup.2).sub.b SiO.sub.(4-(a+b))/2 (I)(B) a polyorganohydrogensiloxane comprising structural units shown by the following formula:(R.sup.3).sub.c H.sub.d SiO(4-(c+d))/2 (II)and having at least three silicon-bonded hydrogen atoms per molecule, the amount of component (B) being such that the number of silicon-bonded hydrogen atoms in component (B) is from 0.5 to 4.0 per R.sup.1 group in the structural units shown by formula (I) of component (A),(C) from 0.1 to 10 parts by weight of a compound selected from the group consisting of an organosilicon compound having, per molecule, at least one silicon-bonded hydrogen atoms and at least one group represented by the following formula: ##STR1## and an acrylic- or methacrylic-functional silane coupling agent, (D) from 0.

Abstract: Improved thermoplastic compositions characterized by high tensile elongation values are described. They comprise polyphenylene ether resin, a hydrogenated elastomeric block copolymer having an A-B-A' structure, with specific molecular weight values for the copolymer blocks and a phenylsiloxane fluid of particular composition. Electrical conductor articles which include polymerized thermoplastic compositions as mentioned above represent another embodiment of this invention.

Abstract: Organosiloxane compositions curable by a platinum-catalyzed hydrosilation reaction contain as the adhesion promoter a silane comprising an silicon-bonded alkenyl radical containing at least five carbon atoms and at least one alkoxy group. The silane or a hydrolysis-condensation product thereof is optionally used in combination with a catalyst that promotes reaction of the silane with groups present on the surface of the substrate to which bonding is desired.

Abstract: Aromatic carbonate polymers are flame retarded by an effective amount of a metal oxide of aluminum, magnesium, lithium, lanthanum, bismuth or yttrium. Colloidal aluminum oxide on silica is particularly effective.

Abstract: Silane polymer coating compositions which have excellent bonding properties for metallic surfaces and which make such surfaces highly resistant to corrosion. The compositions are formed by anhydrously reacting an epoxy trialkoxy silane with a primary amino trialkoxy silane in a stoichiometric molar ratio which provides one epoxy group for reacton with each primary amino hydrogen site to form the silane polymer coating composition. The composition is applied to the metal surface, and is hydrolyzed and dehydrated in situ to crosslink thereon and bond to the surface to form the corrosion-resistant coating.

Abstract: A curable organopolysiloxane composition comprising (A) an organopolysiloxane having at least two alkenyl groups and a viscosity of 100 to 200,000 cs, (B) a specific organopolysiloxane having an alkoxysilyl group, (C) an organohydrogen polysiloxane having at least two hydrogen atoms attached to silicon atoms, and (D) an addition reaction catalyst is improved in adhesion. It cures to substrates of metals, glass, rubber and plastics to form a firm bond even in low temperature or brief high temperature curing conditions.

Abstract: A method of making a hot-melt silicone pressure sensitive adhesive-coated substrate comprises (a) heating a hot-melt silicone pressure sensitive adhesive composition which includes a mixture of (i) a silicone resin, (ii) a silicone fluid, and (iii) from about 0.5 to about 10 weight percent, based on the total weight of the silicone resin and the silicone fluid, of a non-flammable hydrocarbon having a weight-average molecular weight of from about 300 to about 1500 as measured by gel permeation chromatography calibrated with narrow distribution polydimethylsiloxane standards (b) coating the heated adhesive composition onto a substrate, and (c) cooling the coated adhesive composition until it is in a generally non-flowing state.

Abstract: The silicone rubber composition of the present invention is characterized by using a diorganopolysiloxane having an average degree of polymerization of 3,000 to 30,000 in combination with a low-molecular weight of phenyl-group-containing organopolysiloxane having the following formula: ##STR1## wherein R.sup.1 represents a phenyl group, R.sup.2 and R.sup.3 each represent a monovalent hydrocarbon group having 1 to 10 carbon atoms, and n is 1 or 2.The composition can form a vulcanized molded item having excellent properties such as excellent storage stability, heat resistance, and fire resistance without causing blooming.

Abstract: A polyarylene sulfide resin composition comprising a compound obtained by mixing 60-99 parts by weight of a polyarylene sulfide resin (A), 40-1 parts by weight of a polyorganosiloxane rubber (B), 0.01-10 parts by weight of an organosilane compound having at least one epoxy group and at least one alkoxy group bonded directly to a silicon atom (C) and 0-300% by weight of a reinforcing filler (D) based on the total weight of the components (A), (B) and (C) where the total amount of the components (A) and (B) is 100 parts by weight. The polyarylene sulfide resin composition is excellent in impact resistance, heat resistance, mechanical strength, moldability and the like.

Abstract: Process for producing novel water-base coating compositions and for applying such compositions to metal surfaces to render them corrosion-resistant, comprising reacting an epoxy trialkoxy silane with a primary aminotrialkoxy silane in a molar ratio providing one epoxy group for reaction with each primary amino hydrogen to form a hydrolyzable siloxane precursor coating composition which is solubilized, such as by the presence of a volatile organic weak acid and hydrolyzing said precursor compound in situ on a metallic surface to form a silanol precursor compound which is bonded to a metallic surface and is simultaneously cross-linked with itself and/or with external crosslinking agents under dehydration conditions to form a corrosion-resistant conversion coating or bonding coating having exceptional durability.

Abstract: An aqueous silicone compound-containing coating composition comprises an addition polymer dispersion and at least one silicone compound, the silicone compound forming part of the disperse phase of a dispersion of multi-polymer particles.The silicone compound may be monomeric, oligomeric or polymeric and it may either be added in existing form or be prepared in situ. The provision of reactive groups on either or both of silicone compound as addition polymer gives cross-linking capacity.An unusally wide variety of silicones can be used in the compositions including some not normally associated with coating compositions.

Abstract: A coating composition is disclosed comprising an organosilane polymer, a polyester or a copolymer thereof, an amino resin crosslinking agent, and a silsesquioxane compound. Such a composition is especially useful for providing a flexible finish on non-metallic parts of automobiles and trucks. This finish has the advantage of superior etch resistance and outstanding weatherability and durability characteristics.

Abstract: Improved flame retardance and smoke/heat reduction has been imparted to polyphenylene ethers by blending the polyphenylene ethers with organopolysiloxane fluids having a critical mole % range of chemically combined phenylsiloxane units.

Abstract: Novel polyorganosiloxane cross-linkers for incorporation into conventional room temperature vulcanizable (RTV) sealant formulations, and the RTV sealants into which these cross-linkers are compounded, are disclosed.

Abstract: A sealant composition especially useful for porous materials such as wood, concrete and mansonry is provided comprising: (a) a silanol-terminated polysiloxane having a molecular weight greater than about 2000; (b) a multifunctional silane having functional groups which condense with silanol groups in the presence of atmospheric moisture at room temperature to form a cross-linked polymer; and (c) a nonaqueous volatile solvent which is non-reactive with components (a) and (b).The sealant composition renders said materials waterproof by coating and filling in the pores of said material with cured silicone rubber product.In a preferred embodiment the composition also contains a metal-containing curing catalyst and a volatile or subliming chelating agent in an amount sufficient to prevent cure of the composition in the storage container prior to or during use.The composition may also comprise adhesion agents, surfactants and pigments.

Abstract: Hot-melt silicone pressure sensitive adhesive compositions, methods of using the compositions, articles made using the compositions, and methods of making articles using the compositions. The hot-melt silicone pressure sensitive adhesive compositions include a mixture of (i) a silicone resin, (ii) a polyolimethylsiloxane fluid, and (iii) from about 0.5 to about 20 weight percent, based on the total weight of the silicone resin and the polydimethylsiloxane fluid, of a polyphenylmethylsiloxane fluid having a viscosity at 25.degree. C. of from about 5 to about 60,000 centistokes so that the adhesive will be in a generally flowing state at temperatures above about 100.degree. C., as well as being capable of transdermal drug delivery.

Abstract: Hot-melt silicone pressure sensitive adhesive composition, methods of using the composition, article made using the composition, and methods of making articles using the composition. The hot-melt silicone pressure sensitive adhesive composition includes a mixture of (i) a silicone resin, (ii) a silicone fluid, and (iii) from about 0.5 to about 10 weight percent, based on the total weight of the silicone resin and the silicone fluid, of a non-flammable hydrocarbon having a weight-average molecular weight of from about 300 to about 1500 as measured by gel permeation chromatography calibrated with narrow distribution polydimethylsiloxane standards.

Abstract: A process for preparing a polyester having an inherent viscosity of at least 0.5 comprising(A) preparing an admixture of a molten polyester having an inherent viscosity of less than 0.5, a titanium alkoxide and a 13X zeolite, and(B) subjecting the admixture to a time and temperature sufficient to increase the inherent viscosity of the polyester to at least 0.5.

Abstract: This invention discloses an adhesive organopolysiloxane compositions which cure in the presence of addition reaction catalysts and adhere firmly to various materials when they harden comprising;(1) 100 parts by weight of an organopolysiloxane containing at least alkenyl groups bonded to silicon atoms in 1 molecule,(2) an organohydrogenpolysiloxane containing at least 3 hydrogen atoms bonded to silicon atoms in 1 molecule, in sufficient quantity to donate 0.5-10 hydrogen atoms bonded to silicon atoms to 1 alkenyl group in said 1st constituent,(3) 0.1-20 parts by weight of an organosilicone compound containing at least 1 hydrogen atom bonded to silicon atoms, at least 1 fluoroalkyl group or fluoroalkylether group bonded to silicon atoms via carbon atoms and at least 1 epoxy group and/or trialkoxysilyl group bonded to silicon atoms via carbon atoms in 1 molecule, and(4) platinum or a platinum compound in suitable quantity to act as a catalyst.

Abstract: Good quality films can be formed on a substrate by coating a substrate with a solution comprising a liquid silicate solvent containing a dissolved photocurable arylsiloxane oligomer or polymer. Phenyl silocane/silicate compositions can be used to form photocurable films on substrates for use as dielectric films, protective coatings, and the like.

Abstract: The hardness of coatings comprising a photocurable arylsiloxane oligomer or polymer and a liquid organosilicate can be dramatically improved by first curing the coating with ultraviolet light followed by heating.

Abstract: A flame retardant polymer composition which is substantially free of halogen compounds and of organometallic salts comprises (A) an organic polymer, at least 40% by weight of which is a copolymer of ethylene with one or more comonomers selected from the group consisting of alkyl acrylates, alkyl methacrylates, acrylic acid, methacrylic acid and vinyl acetate, (B) a silicone fluid or gum and (C) an inorganic filler which is a compound of a metal of Group II A of the Periodic Table of Elements but which is neither a hydroxide nor a substantially hydrated compound. Suitable inorganic fillers are magnesium oxide, magnesium carbonate and calcium carbonate, the latter being the most preferred. The compositions are particularly suitable for use in wire and cable applications.

Abstract: Disclosed is a casting resin based on acrylic acid esters having a high content of finely dispersed fillers and containing a mixture of organosilicon compounds having functional groups and metallic acid esters of metals of Groups IVB and VB of the Periodic Table of the Elements. The functional group of the organosilicon compound is ethylenically unsaturated and bound to the silicon atom either directly or through alkylene groups. The addition of this mixture to the casing resins produces a desirable reduction of the viscosity of these resins, which are used, for example, for the manufacture of sanitary articles.The filler content is at least 20% and can be as high as 95% with the proviso that when the filler content is in excess of 80 wt. -%, the filler contains 10 to 30 wt. -%, based on the total weight of filler, of fines having a particle size less than 0.1 mm and the remainder of the filler being coarse up to 4 mm.

Abstract: A curable silicone composition comprising:(A) an organopolysiloxane having at least two silicon-bonded aliphatic unsaturated hydrocarbon radicals in its molecule;(B) an organohydrogenpolysiloxane having at least three silicon-bonded hydrogen atoms in its molecule;(C) a platinum family metal catalyst; and(D) a nonionic surface active agent having a hydrophobic silicone portion and at least one hydrophilic polyol portion in its molecule. The curable silicone composition gives cured products having good hydrophilic properties and dimensional stability, and are especially suitable for use as a dental impression material.

Abstract: A synthetic resin composition, having a high toughness and a wear resistance, comprises a synthetic resin with solubility parameter .delta.9.5 cal1/2 cm.sup.31 3/2 or higher and a modifier with solubility parameter .delta.8.5 cal.sup.1/2 cm.sup.-3/2 or lower and dispersed therein, characterized in that a silicon containing copolyester, being a block copolymer consisting of 1.about.90% by weight of siloxane segment represented by the undermentioned general formula (A) and 99.about.1% by weight of polyester segment represented by the undermentioned general formula (B), the degree of polymerization of siloxane segment being 1.about.2,000, and that of polyester segment 1.about.1,000, is added to be mixed therewith as a dispersibility improver: ##STR1## (In this formula, m denotes a number of 1.about.2,000.) ##STR2## (In this formula, R.sub.1 designates one or two or more members selected from among aromatic divalent radicals having 6.about.12 carbon atoms or aliphatic divalent radicals having 4.about.

Abstract: Flame retardant halogen-free aromatic polycarbonate copolymer blends are provided of certain triarylsilicon materials, such as hexaphenyldisiloxane with an aromatic polycarbonate copolymer which includes polyester carbonates having condensed silphenylenecarbonyl units. The aromatic polycarbonate blends can be injection molded at thicknesses of 1/16" to provide thermoplastics capable of satisfying the V-O requirements of the UL-94 test.

Abstract: Processes for treating polymeric surfaces to produce smooth, durable, slippery coatings which are able to withstand the rigors of sterilization and, long term exposure to human blood and other bodily fluids without substantial loss of their slipperiness. An article or device suitable as a wound drainage device coated in accordance with the process described is also disclosed.

Abstract: Diorganopolysiloxanes containing itaconate functional groups include at least one recurring structural unit of the formula (1): ##EQU1## in which a is 1 or 2; the symbol Z is one of the radicals --CH.sub.2 CH(COOR')CH.sub.2 COOR' and --C(CH.sub.3)(COOR')CH.sub.2 COOR'; the symbols R, which may be identical or different, are each a C.sub.1 -C.sub.20 alkyl, vinyl, phenyl or 3,3,3-trifluoropropyl radical, and, in the case where a=2, one of the radicals R may be a hydroxyl group; and the symbols R', which may be identical or different, are each a C.sub.1 -C.sub.12 monovalent hydrocarbon radical or a C.sub.2 -C.sub.12 monovalent alkoxyalkyl radical, and are useful, e.g., as PVC lubricants and hydraulic fluids; they are facilely prepared by hydrolysis/polycondensation or by hydrosilylation.

Abstract: A coating composition is disclosed which includes(A) 15 to 65% by weight (calculated as SiO.sub.2) of colloidal silica,a partially hydrolyzed and partially co-condensed product of the following component (B) and component (C):(B) 10 to 80% by weight (calculated as R.sup.1 Si(OH).sub.3) of a trialkoxysilane of the formula: R.sup.1 Si(OR.sup.2).sub.3 wherein the group R.sup.1 is methyl or vinyl and the group R.sup.2 is alkyl having 1 to 4 carbon atoms,(C) 1 to 50% by weight (calculated as R.sup.3.sub.n Si(OH).sub.4-n) of an acetoxysilane of the formula: R.sup.3.sub.n Si(OCOCH.sub.3).sub.4-n wherein the group R.sup.3 is alkyl having 1 to 3 carbon atoms, vinyl, phenyl, or mercaptoalkyl having 1 to 3 carbon atoms, and n is an integer of 0 to 2, provided that the total amount of the component (B) wherein the group R.sup.1 is methyl and the component (C) wherein the group R.sup.

Abstract: Fluorosilicone heat cured rubber compositions are prepared using a chain modifier mixture comprising vinyl terminated polysiloxanes and silanol terminated siloxanes which allow vinyl-on-chain-ends functionality to easily crosslink unhindered by perfluoroalkyl groups.

Abstract: Curable fluororubber compositions comprising an organic fluororubber, an organopolysiloxane gum and an epoxy-containing organoalkoxysilane or partial hydrolyzate thereof, a reinforcing filler and an organoperoxide are characterized by excellent roll workability during roll milling and can be cured to yield a fluororubber which undergoes little deterioration in its mechanical properties at low temperatures.

Abstract: Processes for treating polymeric surfaces to produce smooth, durable, slippery coatings which are able to withstand the rigors of sterilization and, long term exposure to human blood and other bodily fluids without substantial loss of their slipperiness.

Abstract: A latent curable electronic coating composition is described which comprises:a. a linear dimethylvinyl chainstopped polydimethylsiloxane fluid having a viscosity of about 500 to 5000 centipoise at 25.degree. C.;b. an organohydrogenpolysiloxane;c. an amount of a platinum catalyst sufficient to cause the co-reaction of (a) and (b);d. a combination of inhibiting agents comprised of (i) an ethylenically unsaturated isocyanurate and (ii) a dialkyl acetylenedicarboxylate; ande. a silanol-containing dimethyl siloxane hydrolyzate having a silanol content from about 0.5% to about 1.5% and a viscosity from about 4 to about 40 centipoise at 25.degree. C.

Abstract: A process is described for the production of an oriented, heat-set polyester film including an admixture of polydiorganosiloxane in the amount of 0.001 to 2% by weight, as well as further additives, such as inert inorganic and/or organic particles. The thermoplastic material is melted in an extruder and extruded through an appropriate die to give a cast film, is then quenched, reheated, stretch oriented, and heat set. The characteristic criteria is the addition of the polydiorganosiloxane to the polydiorganosiloxane-free polyester in the form of a masterbatch.

Abstract: A stabilized surface-segregatable, melt-extrudable thermoplastic composition suitable for processing by melt extrusion to form a fiber or film having a differential, increasing concentration of a siloxane-containing primary additive from the center of the fiber or film to the surface thereof, which differential, increasing concentration imparts hydrophilicity to the surface of the fiber or film, which composition includes at least one thermoplastic polymer, at least one siloxane-containing primary additive, and at least one siloxane-containing stabilizing additive. During formation of the fiber or film, the primary additive rapidly segregates in a controllable manner toward the newly-formed surface of the fiber or film, thereby resulting in a controllable differential concentration of the primary additive, which concentration increases with increasing distance from the center of the fiber or film to its surface. The weight ratio of the polymer to the additive is in the range of from about 1 to about 1,000.

Abstract: An encapsulating composition for electronic devices comprises a curable material such as an epoxy resin and an ion scavenger compound selected from certain calixarene or oxycalixarene compounds in which at least half of the phenolic groups have been substituted by specific groups and certain silacrown compounds. Exemplary ion scavenger compounds include ##STR1## the tetraethyl acetate of 7, 13, 19, 25-tetra-tertbutyl-27, 28, 29, 30-tetrahydroxy-2,3-dihomo-3-oxacalix-4-arene and 1,1-dimethasila-17-crown-6.

Abstract: A process for improving properties of a synthetic resin powder which comprises: subjecting a latex of a graft-copolymer whose back bone is a rubber to coagulation, and adding a silicone oil to the graft-copolymer in an amount of 0.01 to 10 parts by weight based on 100 parts by weight of said graft-copolymer. According to the present invention, the bulk specific gravity of a synthetic resin powder can be made large, the flowability and blocking resistance can be remarkably improved in comparison with known methods. Accordingly, the blocking during storage can be prevented, a line for transport is not packed with the resin powder, it is possible to automatically weigh the resin powder, and it is applicable to the tendency to grow larger in transport.

Abstract: A coating composition comprising:(a) 100 parts by weight (in terms of organoalkoxysilane) of at least one compound selected from the group consisting of (a') an organoalkoxysilane represented by the general formula (I):RSi(OR.sup.1).sub.3 (I)wherein R is an organic group having 1-8 carbon atoms and R.sup.1 is an alkyl group having 1-5 carbon atoms or an acyl group having 1-4 carbon atoms, (a") a hydrolyzate of (a') and (a'") a partial condensate of (a'),(b) 5-50 parts by weight (as solids) of colloidal alumina, and(c.sub.1) 2-200 parts by weight of at least one organopolysiloxane having at least one reactive functional group in the polymer molecule and/or(c.sub.2) 3-6,000 parts by weight of at least one silyl group-containing vinyl polymer having, at the terminal(s) or side chain(s) of the polymer molecule, at least one silyl group having a silicon atom having bonded thereto a hydrolyzable group, and(d) an organic solvent.