Abstract: Organosilicon compounds having organooxysilyl groups at ends and a polysulfide group at an intermediate of the molecule, which are linked through a divalent hydrocarbon group containing a monosulfide or polysulfide group are novel. These organosilicon compounds are effective as a rubber compounding agent.

Abstract: Provided is a room temperature curable organopolysiloxane composition, including (A) 100 parts by mass of a diorganopolysiloxane with both terminals blocked with silanol groups, or a diorganopolysiloxane with each terminal blocked, independently, with a trialkoxysilyl group or a dialkoxyorganosilyl group, or a mixture thereof, (B) 0.1 to 30 parts by mass of a silane compound and/or a partial hydrolysis-condensation product thereof containing an average of at least two hydrolysable groups bonded to silicon atoms within each molecule, and in which the remaining groups bonded to silicon atoms are methyl groups, ethyl groups, propyl groups, vinyl groups, or phenyl groups, and (C) 0.1 to 10 parts by mass of either one, or two or more organosilicon compounds containing amino groups, and also containing four or more hydrolysable groups. Also provided are a sealing material and an adhesive including the above composition.

Abstract: By reacting a mixture of a halogenoalkyl group-bearing organosilicon compound and sulfur with an aqueous solution or water dispersion of an ammonium or alkali metal sulfide or a hydrate thereof in the presence of a phase transfer catalyst, a sulfide chain-bearing organosilicon compound having the average compositional formula (2): (R1O)(3-p)(R2)pSi—R3—Sm—R3—Si(OR1)(3-p)(R2)p??(2) wherein m has an average value of 2?m?6 is obtained in high yields and at a low cost with minimized formation of a monosulfide-bearing organosilicon compound.

Abstract: By reacting a halogenoalkyl group-bearing organosilicon compound and optionally sulfur with an aqueous solution or water dispersion of an ammonium or alkali metal polysulfide or a hydrate thereof in the presence of a phase transfer catalyst, a sulfide chain-bearing organosilicon compound having the average compositional formula (2): (R1O)(3-p)(R2)pSi—R3—S—R3—Si(OR1)(3-p)(R2)p ??(2) wherein m has an average value of 2?m?6 is obtained in high yields and at a low cost with minimized formation of a monosulfide-bearing organosilicon compound.

Abstract: By premixing a sulfide chain-bearing organosilicon compound, a halogenoalkyl group-bearing organosilicon compound, and optionally, sulfur, adding anhydrous sodium sulfide Na2S to the premix, and allowing reaction to take place, a sulfide chain-bearing organosilicon compound having a shorter sulfide chain can be prepared in high yields and at a lost cost while minimizing formation of monosulfide-bearing organosilicon compound.

Abstract: Organosilicon compounds having organooxysilyl groups at ends and a polysulfide group at an intermediate of the molecule, which are linked through a divalent hydrocarbon group containing a monosulfide or polysulfide group are novel. These organosilicon compounds are effective as a rubber compounding agent.

Abstract: An image apparatus and method of the same use a circular marker having two semicircular portions of first and second color areas separated by a center line. An image of a real space including the marker is acquired and an area of the marker is detected from the image. Center coordinates of the marker, for arranging a virtual object in the real space, are calculated based on coordinates of tangents with the area of the marker in a horizontal direction and a vertical direction of the image. Angles of the marker, for arranging the virtual object in the real space, are calculated based on the area of the marker. Then, an image, which has the virtual object arranged in the real space by the position and angles indicated by the marker, is constructed based on the calculation results and shape data of the virtual object.

Abstract: An imaging apparatus and method of the same, able to combining an image of a virtual object in an image of a real space so that the virtual object is virtually located in the real space at a desired position and at desired angles and able to easily set the position, posture, etc. of the virtual object, using a circular marker having two semicircular portions of first and second color areas separated by a center line, acquiring an image of a real space including the marker, detecting the marker area, and analyzing the detected marker area So as to calculate the position, size, elevation of the image pickup relative to the marker, and azimuth rotation angle and rolling rotation angle of the marker and, according to the results of calculation and the shape data of the virtual object, calculating a composite image where a virtual object is arranged in a real space by a position, dimensions, and angles indicated by the marker.

Abstract: By reacting a sulfide chain-bearing organosilicon compound having the formula: (R1O)(3−p)(R2)pSi—R3Sm—R3—Si(OR1)(3−p)(R2)p wherein R1 and R2 each are a monovalent C1-4 hydrocarbon group, R3 is a divalent C1-10 hydrocarbon group, 2<m≦6, and p is 0, 1 or 2, an alkali or alkaline earth metal, a halogenoalkyl group-bearing organosilicon compound having the formula: (R1O)(3−p)(R2)pSi—R3—X wherein X is halogen, and optionally, sulfur, a sulfide chain-bearing organosilicon compound having the formula: (R1O)(3-p)(R2)pSi—R3—Sn—R3—Si(OR1)(3-p)(R2)p wherein 2≦n<6, and m>n, that is, having a shorter sulfide chain can be prepared in high yields and at a lost cost.

Abstract: Organosilicon compounds having an organooxysilyl group at one end and a monovalent hydrocarbon group at the other end of the molecule and containing a polysulfide group and organosilicon compounds having organooxysilyl groups at both ends of the molecule and containing a divalent hydrocarbon group flanked with polysulfide groups at a center thereof are useful as a compounding additive to inorganic-organic composite materials and a surface treating agent for fillers, Processes capable of effective preparation of these organosilicon compounds are also provided.

Abstract: Organosilicon compounds having organooxysilyl groups at ends and a polysulfide group at an intermediate of the molecule, which are linked through a divalent hydrocarbon group containing a monosulfide or polysulfide group are novel. These organosilicon compounds are effective as a rubber compounding agent.

Abstract: By premixing a sulfide chain-bearing organosilicon compound, a halogenoalkyl group-bearing organosilicon compound, and optionally, sulfur, adding anhydrous sodium sulfide Na2S to the premix, and allowing reaction to take place, a sulfide chain-bearing organosilicon compound having a shorter sulfide chain can be prepared in high yields and at a lost cost while minimizing formation of monosulfide-bearing organosilicon compound.

Abstract: By reacting a sulfide chain-bearing organosilicon compound having the formula:

Abstract: Organosilicon compounds having an organooxysilyl group at one end and a monovalent hydrocarbon group at the other end of the molecule and containing a polysulfide group and organosilicon compounds having organooxysilyl groups at both ends of the molecule and containing a divalent hydrocarbon group flanked with polysulfide groups at a center thereof are useful as a compounding additive to inorganic-organic composite materials and a surface treating agent for fillers, Processes capable of effective preparation of these organosilicon compounds are also provided.

Abstract: A curable resin composition contains (A) a curable resin and (B) a ketimine structure-bearing organosilicon compound obtained by reacting an amino-functional alkoxysilane with a monocarbonyl compound, the organosilicon compound having a monomer purity of 50-95% and an amino group blockage of at least 90%. The composition has good shelf stability and tight adhesion and is useful as an adhesive.

Abstract: A mixture of short-chain polysulfide silanes of the formula: (RO).sub.3 SiC.sub.3 H.sub.6 S.sub.n C.sub.3 H.sub.6 Si(OR).sub.3 wherein R is methyl or ethyl and n is a positive number having a distribution whose average falls in the range: 2.2.ltoreq.n.ltoreq.2.8 is prepared by reacting metal polysulfides, typically Na.sub.2 S.sub.n with a halogenopropyltrialkoxysilane of the formula: (RO).sub.3 SiC.sub.3 H.sub.6 X wherein X is halogen.

Abstract: Novel organosilicon compounds containing organooxysilyl and sulfenamide groups in the molecule are provided. They are useful as interfacial binders between inorganic materials and organic materials, adhesion modifiers for organic resins and rubber, primers, etc.

Abstract: A mixture of short-chain polysulfide silanes having the formula: (RO).sub.3 SiC.sub.3 H.sub.6 S.sub.n C.sub.3 H.sub.6 Si(OR).sub.3 wherein R is methyl or ethyl and n is a positive number having a distribution in the average range of 2.1.ltoreq.n.ltoreq.2.9, is prepared by reacting one mole of an anhydrous sulfide of the formula: M.sub.2 S or NS wherein M is an alkali metal or ammonium and N is an alkaline earth metal or zinc, with (n-1) mole of sulfur in an inert gas atmosphere and in a polar solvent, thereby forming polysulfide compounds, and reacting the polysulfide compounds with a halogenopropyltrialkoxysilane of the formula: (RO).sub.3 SiC.sub.3 H.sub.6 X wherein R is as defined above and X is a halogen atom. The method is simple to produce polysulfide silanes in high yields.

Abstract: Polysulfide silanes: (RO).sub.3 SiC.sub.3 H.sub.6 S.sub.x C.sub.3 H.sub.6 Si(OR).sub.3 are reacted with an anhydrous sulfur compound: M.sup.1.sub.2 S or M.sup.2 S and a halogenoalkoxysilane: XC.sub.3 H.sub.6 Si(OR).sub.3 to form polysulfide silanes: (RO).sub.3 SiC.sub.3 H.sub.6 S.sub.y C.sub.3 H.sub.6 Si(OR).sub.3 wherein R is methyl or ethyl, x is a positive number of 3 to 6 on the average, M.sup.1 is an alkali metal or ammonium, M.sup.2 is an alkaline earth metal or zinc, X is a halogen, and y is a positive number less than x on the average. Short chain polysulfide silanes can be prepared with the industrial advantages of safety, high yields and low cost.

Abstract: Novel organic silicon compounds of formula (1) are provided. ##STR1## R.sup.1 is a monovalent C.sub.1 -C.sub.4 hydrocarbon group, R.sup.2 is a divalent C.sub.2 -C.sub.3 hydrocarbon group, R.sup.3 is a monovalent C.sub.1 -C.sub.2 hydrocarbon group, m is an integer of 3-10, n is equal to 0, 1 or 2, p is equal to 0 or 1, and the sum of n+p is equal to 0, 1 or 2. Inorganic fillers are surface treated with the organic silicon compounds. Compositions comprising EPR and/or EPDM in admixture with the treated inorganic fillers are electrically insulating and have improved oil resistance and mechanical strength.