Abstract: Ungelled, aqueous dispersions of silane-terminated partially crosslinked polyurethane polymers are described which are the reaction product of A) an isocyanate-containing prepolymer formed from: (i) a molar excess of organic polyisocyanate sufficient to promote substantially equal access to isocyanate groups; (ii) active hydrogen-containing material; (iii) sterically hindered amines; (iv) emulsifying monomer; B) chain-extending monomer; C) an organic compound having a pKb of at most about 7; and D) a silane coupling agent represented by the general formula ASi(OR.sup.2).sub.3 and present in an amount sufficient to partially crosslink the polyurethane resin but insufficient to gel the dispersion, provide advantages over previously known polyurethanes used as surface coatings. The hindered amine allows surface coatings incorporating the polyurethanes to be easily removed by aqueous compositions having pH between about 2 and 5. Methods of making the prepolymers, polymers, and dispersions are also presented.

Abstract: A method for continuously producing a room temperature vulcanizable composition is disclosed. A base mixture of a silanol stopped fluorosilicone polymer, a silica filler and iron oxide are processed in an extruder at an elevated temperature between about 50 and 200.degree. C. Thereafter, a tin based catalyst, an acetoxy cross-linking agent and an optional adhesion promoter are added to the extruder near the exit port. The resulting material has improved storage stability.

Abstract: Silicone rubber coatings resistant to fouling by aquatic organisms are based on a hydroxy-functional polydiorganosiloxane and a crosslinking agent therefor. The hydroxy-functional polydiorganosiloxane may be packaged separately from the crosslinking agent, or a stable package comprising a hydroxy-functional polydiorganosiloxane terminated by excess crosslinking agent may be packaged separately from further hydroxy-functional polydiorganosiloxane. In either case the two packages can be combined to give the optimum ratio of crosslinking agent to silicon-bonded hydroxyl groups to ensure cure and give optimum resistance to fouling, whilst overcoming the problem of premature gelation during storage.

Abstract: A condensation-curing type curable composition which comprises a diorganopolysiloxane or polyoxyalkylene blocked by hydrolyzable silyl group at both terminal ends of its molecular chain as a base polymer, in which a carbonyl group-containing organic compound and an amino group-containing organic compound are compounded. This composition is capable of forming water through dehydration condensation between carbonyl and amino groups, simultaneously with curing of the composition by moisture in air. The formation of water offers marked improvements in fast-curing property and also in depth curing property.

Abstract: Room temperature curable organopolysiloxane compositions (and the hardened products of such compositions) which comprise (A) a diorganopolysiloxane with hydroxyl groups at both ends, (B) a quaternary functional silane with four groups to be hydrolyzed and/or partially hydrolyzed products thereof, (C) a curing catalyst, (D) a filler, (E) a tertiary functional silane with three groups to be hydrolyzed and/or partially hydrolyzed products thereof and (F) an amine functional silane and/or an addition products with an acrylic acid ester or with a methacrylic acid ester show good adhesiveness towards surface-activated objects which has superior water-resistance.

Abstract: A solvent-free, cold-setting ternary organosiloxane composition is disclosed, which contains (A) liquid organopolysiloxane, (B) a cross-linking agent, and (C) a curing catalyst, said organopolysiloxane (A) being constituted by organosilicon group of X--Si (wherein X represents a hydrogen atom or a monovalent hydrocarbyl group) and functional side chain of OR (wherein R represents a hydrogen atom, a C.sub.1 -C.sub.5 alkyl group or an acyl group), said cross-linking agent (B) being one or more organometallic compounds selected from the group consisting of an organoaluminum compound, an organoboron compound, an organosilicon compound, an organotitanium compound and an organozirconium compound having at least one functional group selected from among an alkoxy group, an acyloxy group and an oxime group, and said curing catalyst (C) being a metal-containing organic compound, with the total contents of the metal elements of the ternary composition being 40% by weight or more in terms of MO.sub.

Abstract: An improved silicone composition is disclosed, which comprises:a) at least one silanol chain-stopped polydiorganosiloxane polymer;b) an acyloxy, alkoxy, or aryloxy-functional crosslinking agent; andc) a catalytic amount of an onium salt photocatalyst.These materials are characterized by enhanced cure properties, such as short tack free time; and they can also include various other components, such as fillers, plasticizers, condensation cure catalysts, and adhesion promoters.

Abstract: A two part sealant cures rapidly in deep sections when the two parts are mixed together. A first part comprises a hydroxyl endblocked polydiorganosiloxane, non-reinforcing, non-acidic filler, diacetamidosilane chain extender of the general formula ##STR1## and aminoxysilicone compound having from 1 to 100 silicone atoms per molecule and from 3 to 10 aminoxy groups per molecule. A second part comprises a hydroxyl endblocked polydiorganosiloxane, non-reinforcing, non-acidic filler, and hydroxyl endblocked polydiorganosiloxane having a degree of substitution of from about 1 to 50. When mixed together, the two parts cure rapidly in deep sections.

Abstract: A RTV silicone rubber composition comprising (A) an organopolysiloxane composed predominantly of a silalkylenesiloxane unit and containing an aliphatic unsaturated group in a molecule, (B) an organohydrogenpolysiloxane having at least two SiH groups in a molecule, and (C) a platinum group compound cures into a transparent elastomer which is increased in rubbery strength without adding a filler.

Abstract: A film-forming organopolysiloxane composition is disclosed which imparts an excellent releaseability and lubricity to the surface of various types of rubber materials. The composition comprises a solvent dispersion of(a) 50 to 90 weight percent of a block organopolysiloxane copolymer;(b) 2 to 50 weight percent of a compound selected from the group consisting of an organosilane or a partial hydrolyzate thereof;(c) 4 to 40 weight percent of a mixture an epoxy group-containing organoalkoxysilane and an alkenyl group-containing organoacetoxysilane in a weight ratio of 1:9 to 9:1 or a condensation-reaction product thereof;(d) 0.1 to 10 weight percent of an hydroxy or alkoxy terminated diorganopolysiloxane; and(f) 0.1 to 10 weight percent of a condensation-reaction catalyst.

Abstract: The present invention is characterized by adding and mixing an organosilicon compound having alkoxy, groups and an ester linkage in the molecule represented by the following formula: ##STR1## in an amount of 1 to 20 parts by weight per 100 parts by weight of a trifluoropropylalkylpolysiloxane. Said organosilicon compound has a function as a storage stabilizer as well as a curing agent and, according to the present invention, an RTV fluorosilicone composition that has hitherto been difficult to be applied as an adhesive for electric and electronic parts has been made possible to be used in the particular field.

Abstract: A one component RTV composition having improved primerless adhesion to polycarbonate is formed of: A) polyalkoxysilane endcapped dimethylsilicone polymer, (B) reinforcing fumed silica fillers, (D) organosiloxane plasticizing oils, (E) an optional alkoxy silane crosslinker, (F) a stabilizing amount of a disilazane or polysilazane, (G) a tin condensation cure catalyst from the class of R.sub.2 Sn(beta-diketonate).sub.2 complexes, and (H)/(C) a glycidoxypropyltrimethoxy silane/cyanoethyltrimethoxysilane co-adhesion promoting system, having improved auto-adhesion to polycarbonate.

Abstract: Compositions which are stable at room temperature, but when heated to an elevated temperature crosslink to form elastomeric solids comprising(A) organopolysiloxanes containing silicon bonded hydroxyl groups,(B) a crosslinking agent selected from(a) silanes,(b) partial hydrolyzates thereof and(c) organohydrogenpolysiloxanes and(C) an aluminum salt of a carboxylic acid which is a solid at room temperature.When the compositions are heated to a temperature of at least 50.degree. C. and more preferably from 100.degree. to 350.degree. C., they cure to form elastomeric solids.

Abstract: A room temperature curable organopolysiloxane composition comprising a diorganopolysiloxane having a hydroxyl group or alkoxy groups, a filler, a particular alkoxysilane, an organosilicon compound having a particular guanidinyl group, and an organic tin compound, and further comprising an organosilicon compound having at least one group represented by the general formula: ##STR1## where R.sup.4 is a substituted or unsubstituted monovalent hydrocarbon group, or a substituted or unsubstituted phenyl group, R.sup.5 and R.sup.6 are each a hydrogen atom, methyl or ethyl group, and n is an integer of 0, 1 or 2. By virtue of the last component, the composition exhibits markedly good storage stability.

Abstract: The present room temperature curing composition comprises an organopolysilethylenesiloxane represented by the following general formula: ##STR1## wherein R.sup.1 to R.sup.4 each represent an alkyl having up to 8 carbon atoms or a phenyl group and n is an integer of 10 or above, and an organosilane or an organosiloxane having two or more hydrolyzable groups such as alkoxy groups in the molecule. The composition can form a cured product high in rubber strength and excellent in chemical resistance.

Abstract: A mixture of (A) a diorganopolysiloxane end-blocked with a hydroxyl group, (B) an .alpha.,.beta.-substituted vinyloxysilane, or a hydrolyzate thereof, and (C) a perfluorocarboxylic acid derivative provides an RTV organopolysiloxane composition which is stable and non-corrosive to metal.

Abstract: A method of forming a sealant comprising steps of introducing liquids A and B, which are respectively prepared with specified organopolysiloxanes into a mixing chamber having a special rotor secured on the inside thereof, mixing the liquids A and B in the mixing chamber by rotating the special rotor, discharging the obtained mixture on the sealing surface of an article, such as an oil pan of car, and curing it to form the sealant.The liquids A and B may be cured rapidly and finely to a deep level by mixing them in about equal amounts, and thus they are easily and homogeneously mixed, discharged on the sealing surface, and cured to form the sealant with said mixing chamber, and accordingly, the method is excellent in workability and is applied to on-line systems.

Abstract: A room temperature-curable silicone rubber composition comprising a polydiorganosiloxane having a silanol group at the both ends thereof, an organosilane or a partially hydrolyzed condensate thereof, an epoxyalkylalkoxysilane, and an organosilicon group-containing isocyanurate. The composition shows improved adhesive property to various materials and having excellent moisture resistance and hot water-resistant adhesive property, and is useful as a sealing material for various apparatuses and structures which are used in hot water or moist heat atmosphere.

Abstract: A primer composition comprising:(A) an organosilicon compound formed by binding an organosilicon compound represented by the general formula (I): ##EQU1## wherein R.sup.1 represents a monovalent hydrocarbon group; X represents a hydrogen atom, a lower alkyl group, etc.; and 0.ltoreq.a<0.2, 0.ltoreq.b<0.2 and 1<c<4,with an organopolysiloxane represented by the general formula (II): ##EQU2## wherein R.sup.2 represents a monovalent hydrocarbon group containing no aliphatic unsaturated group; R.sup.3 represents an alkenyl group; Y represents a hydrogen atom, a lower alkyl group, etc.; and 1.8<d<2.2, 0.004<e<0.2 and 0.ltoreq.f<0.2,in a particular proportion;(B) an organic titanate; and(C) an organic solvent.This primer composition achieves adhesion with good durability at high temperatures, particularly in high temperature oils.

Abstract: Functionalized diorganopolysiloxanes containing alkoxy endgroups, well adapted for the formulation of single-component cold-vulcanizable elastomer compositions therefrom, are prepared by reacting an .alpha., .omega.-dihydroxydiorganopolysiloxane oil with a polyalkoxysilane in the presence of a catalytically effective amount of lithium hydroxide.

Abstract: A room temperature-curable organopolysiloxane composition is proposed which is capable of giving a cured silicone rubber having a low elastic modulus and low hardness. The composition comprises, in addition to a silanol-terminated diorganopolysiloxane as the base component (a), (b) an organosilicon compound represented by the general formula R.sup.1 R.sup.2 Si(--OCMe.dbd.CHCOOR.sup.3).sub.2, in which Me is a methyl group, R.sup.1 is a methyl, vinyl, 3,3,3-trifluoropropyl or phenyl group, R.sup.2 is a group selected from the class consisting of methyl, vinyl, trimethyl siloxy, vinyl dimethyl siloxy, divinyl methyl siloxy, trivinyl siloxy and 3,3,3-trifluoropropyl dimethyl siloxy groups and R.sup.

Abstract: A room temperature vulcanizable organopolysiloxane composition comprising a diorganopolysiloxane blocked with a hydroxyl group at opposite ends of the molecular chain of the diorganopolysiloxane, a silane or siloxane compound having at least three hydrolyzable groups in the molecule, a filler, and a curing catalyst. The composition further comprises a specific type of amide compound whereby the composition is readily released from electric or electronic parts after having been vulcanized and dipped in a hot soldering bath.

Abstract: Single-component diorganopolysiloxane compositions, stable in storage in the absence of atmospheric moisture and crosslinkable into elastomeric state in the presence of moisture, well adapted, e.g., as sealants and adhesives for the construction industry, contain (A) a diorganopolysiloxane polymer having silanol endgroups, (B) a ketiminoxysilane crosslinking agent, (C) a stabilizing amount of an isocyanurate of the formula: ##STR1## (D) an inorganic filler material, and (E) a metal curing catalyst.

Abstract: Acrylic star polymers containing polysiloxanylalkyl ester groups in their arms and terminal organo groups containing a polymerizable carbon-carbon double bond are useful for improving polymer compositions for contact lenses.

Abstract: A self-leveling silicone composition, which is useful as a sealant in contact with asphalt, cures upon exposure to moisture in the atmosphere to an elastomer having an elongation of at least 1200 percent, and a modulus at both 50 and 100 percent elongation of less than 25 pounds per square inch. The composition consists essentially of a hydroxyl endblocked polydiorganosiloxane, non-acidic, non-reinforcing treated filler, diacetamido functional silane, aminoxysilicon crosslinking compound, and non-reactive silicone fluid diluent.

Abstract: A novel room temperature-curable organopolysiloxane-based composition is proposed which is capable of giving a surface coating highly insusceptible to surface stain even by exposure over years. The composition comprises: (A) a block copolymer composed of dimethylsiloxane units and trifunctional siloxane units of which the organic group is a phenyl group or a fluorine containing aliphatic group, in a specified molar proportion; (B) an organosilane compound having hydrolyzable groups; and (C) a polyoxyalkylene-modified organosiloxane compound of the formula (Me.sub.3 SiO--).sub.2 SiR.sup.4 --C.sub.3 H.sub.6 --(--O--R.sup.5 --).sub.b --O--SiR.sup.6.sub.a X.sub.3-a, in which Me is a methyl group, R.sup.4 is a methyl group or trimethylsiloxy group, R.sup.5 is an ethylene group or propylene group, R.sup.6 is a monovalent hydrocarbon group, X is a hydrolyzable group, the subscript a is zero or 1 and the subscript b is a positive integer not exceeding 50, with optional addition of a condensation catalyst.

Abstract: A gasket and packing material which exhibits excellent adhesiveness to substrates and resistances to degradation of properties when exposed to hot hydrocarbon oils and coolants such as used in an automobile radiator are made by curing a composition which contains polydimethylsiloxane, an organopolysiloxane having R'.sub.3 SiO.sub.0.5 and SiO.sub.2 units or R'.sub.3 SiO.sub.0.5, R'.sub.2 SiO, and SiO.sub.2 units, an inorganic filler, an alkoxysilane adhesion promoter, and a ketoxime silicon compound crosslinker.

Abstract: Platinum-group metals and compounds thereof are microencapsulated within one or two layers of thermoplastic organic polymers. The layer or layers are deposited using known prior art microencapsulation techniques. The microcapsules can be incorporated into storage-stable one-part polyorganosiloxane compositions that cure by a platinum-catalyzed hydrosilation reaction.

Abstract: A room temperature-curable composition comprising(a) 100 parts by weight of a siloxane-amide block copolymer represented by the formula (1) ##STR1## wherein Y represents a hydrolyzable group-containing organosilyl group of the formula --SiR.sup.5.sub.a X.sub.a-ain whichR.sup.5 represents a substituted or unsubstituted monovalent hydrocarbon group,a is an integer of 0, 1 or 2, andX is directly bonded to the silicon atom and represents a hydolyzable group or a hydroxyl group,R.sup.1 represents a divalent group selected from the group consisting of ##STR2## in which R.sup.6 represents a hydrogen atom, a substituted or unsubstituted monovalent hydrocarbon group, or an organosilyl group of the formula --SiR.sup.8.sub.b X.sub.3-bin whichR.sup.8 represents a substituted or unsubstituted monovalent hydrocarbon group,b is an integer of 0, 1, 2, or 3, and X is the same as defined above, andR.sup.

Abstract: Organopolysiloxane compositions that are storage-stable under anhydrous conditions, but curable into elastomeric state in the presence of moisture and, thus, are well suited as sealants and coatings and which particularly strongly adhere to substrates used in the construction industry, contain at least one .alpha., .omega.-dihydroxydiorganopolysiloxane polymer; at least one ketiminoxysilane crosslinking agent therefor; a bonding agent including admixture, or reaction product of, (i) an aminoorganosilicon compound containing a primary amine group, with (ii) an organosilicon compound containing an epoxy functional group; and, advantageously, a filler material and a curing catalyst.

Abstract: A curable polymer composition comprising:(A) 100 parts by weight of an oxyalkylene base polymer having at least one silicon-containing group to the silicon atom of which a hydroxy group and/or a hydrolyzable group is bonded and which is cross linkable through formation of a siloxane bond,(B) 0.1 to 20 parts by weight of at least one compound selected from the group consisting of a compound having one silanol group in the molecule and a compound which, when reacted with moisture, generates a compound having one silanol group in the molecule,(C) 0.1 to 20 parts by weight of a compound having a silicon-containing group to the silicon atom of which two hydrolyzable groups are bonded and an amino group, and(D) 0.01 to 5 parts by weight of a compound having a silicon-containing group to the silicon atom of which three hydrolyzable groups are bonded and an amino group, which composition provides a cured material having low modulus, group bond strength and improved weather resistance of bond strength.

Abstract: A silicone composition which is stable in the absence of moisture, but cures to an elastomer upon exposure to moisture consists essentially of a hydroxyl endblocked polydiorganosiloxane; a difunctionalsilane having acetamido, urea, or urethane functional groups; and a tetrafunctionalsilane having oximino functional groups. A composition containing 100 parts by weight of the polydiorganosiloxane, from 0.1 to 7 parts by weight of difunctionalsilane, from 0.1 to 7 parts by weight of tetrafunctionalsilane, and a ratio of difunctionalsilane to tetrafunctionalsilane of from 0.1 to 3, and optional filler is useful as a sealant or adhesive, having an improved skin over time.

Abstract: Organopolysiloxane compositions that are storage-stable under anhydrous conditions, but curable into elastomeric state in the presence of moisture and, thus, are well suited as sealants and coatings and which particularly strongly adhere to substrate used in the construction industry, contain at least one .alpha., .omega.-dihydroxydiorganopolysiloxane polymer; at least one acyloxysilane crosslinking agent therefor; a bonding agent including admixture, or reaction product of, (i) an aminoorganosilicon compound containing a primary amine group, with (ii) an organosilicon compound containing an epoxy functional group; and, advantageously, a filler material and a curing catalyst.

Abstract: A curable polymer composition comprising(A) an alkyl (meth)acrylate base polymer having a silicon-containing reactive group,(B) an oxyalkylene base polymer having a silicon-containing reactive group,(C) a silicon-containing compound having three or four hydrolyzable groups bonded to the silicon atom,(D) a silicon-containing compound having two hydrolyzable groups bonded to the silicon atom and(E) a curing acceleratorwherein the compounds (C), (D) and (E) are contained in amounts of 0.01 to 30 parts by weight, 0.1 to 30 parts by weight and 0.01 to 10 parts by weight per 100 parts by weight of the total amount of the polymers (A) and (B), which composition has improved storage stability while a cured material therefrom has good mechanical properties, particularly elongation.

Abstract: A curable composition at room temperature comprising (A) 100 parts by weight of a hydrolyzable silyl group-containing vinyl polymer, (B) 0.1 to 100 parts by weight of a specific silane compound and (C) 0 to 20 parts by weight of a curing catalyst, the silane compound (B) being a silane compound selected from ##STR1## The composition is excellent in not only adhesion to melamine alkyd or malamine acrylic resin coatings but also hardness, solvent resistance and staining resistance.

Abstract: Organopolysiloxane compositions which crosslink at room temperature to form paintable elastomers containing (3) an organopolysiloxane having SiC-bonded radicals with a basic nitrogen and/or (4) a branched organopolysiloxane.

Abstract: A room temperature vulcanizable organopolysiloxane composition is provided, comprising (a) a diorganopolysiloxane blocked with a silanol, dialkoxy or trialkoxy radical at both ends of the molecular chain thereof, (b) a novel organic silicon compound of the general formula: ##STR1## wherein R.sup.1 is hydrogen or a monovalent hydrocarbon radical having 1 to 8 carbon atoms, ##STR2## m and l are independently equal to 0, 1 or 2, and n is an integer in the range of 2 to 8, and (c) a curing catalyst. The composition may further contain (d) an organoalkoxysilane.

Abstract: Compounds of formula (I) ##STR1## wherein one of the radicals R.sup.1 or R.sup.2 is --N.dbd.C.dbd.O and the other is --NHC(O)S(CH.sub.2).sub.3 Si(OR.sup.3).sub.3, wherein R.sup.3 is C.sub.1 -C.sub.4 alkyl or phenyl, are most suitable for use as adhesion promoters for polyurethane single-component or two-component adhesives and also as primers.

Abstract: A room temperature vulcanizable organopolysiloxane composition capable of yielding a cured product exhibiting an improved resistance to oil and improved adhesiveness to metals, which comprises a diorganopolysiloxane blocked with a hydroxyl group at both ends of the molecule, an organosilane or siloxane having at least two hydrolyzable groups, each bonded to a silicone atom, in one molecule, and an organosilane or siloxane having at least one vinyl group and at least one hydroxyl group, each bonded to a silicon atom, in one molecule. The composition may further comprise a filler.

Abstract: A faster curing neutral curing composition is obtained by the additive of an oxime compound to a composition comprising a trialkoxysilethylene endblocked polydiorganosiloxane, alkoxysilane crosslinker, and titanium catalyst.

Abstract: One-component, moisture-curable sealant compositions having fast cure times comprise a mixture of a silane-capped polyurethane polymer, an aminosilane cross-linking agent, and a silyl-substituted guanidine accelerator.

Abstract: Compositions which can be stored in the absence of moisture, but crosslink in the presence of moisture at room temperature to form elastomers comprising a diorganopolysiloxane having terminal condensable groups, a silicon compound having at least three hydrolyzable groups bonded directly to silicon per molecule, an average of at least one acyloxy group being present as a hydrolyzable group per silicon atom in the silicon compound, and an organosilicon compound having at least one vicinal epoxy group, in which at least part of the organosilicon compound containing at least one vicinal epoxy group is a cyclic diorganopolysiloxane.

Abstract: The poor electrical conduction at an electrical switch contact caused by organopolysiloxane gas can be prevented by providing that a nitrogenous base gas be simultaneously present with the organopolysiloxane gas. Nitrogeneous base gases can be aliphatic amines or aromatic amines.

Abstract: Organopolysiloxane compositions curable into elastomeric state, whether in single- or two-component form, comprise an .alpha., .omega.-dihydroxypolydiorganopolysiloxane oil, a crosslinking agent therefor, optionally, inorganic fillers and an adhesion promoter, and a catalytically effective amount of a pentacoordinated tin monochelate produced by reacting a tin bischelate with an organic carboxylic acid.

Abstract: An adhesion promoter for use with ultraviolet radiation curable siloxane composition is made by combining an alkoxysilicon compound of the formula(RO).sub.3 Si--X--Si(OR).sub.3and a compound capable of catalyzing the reaction between two alkoxy groups or an alkoxy group and a hydroxyl group. Ultraviolet radiation curable siloxane compositions with the improved adhesion are obtained by mixing the adhesion promoter with a mixture which has at least one ultraviolet radiation activatable siloxane polymer and a photoinitiator. These compositions can be used as optical fiber coatings, conformal coatings, and other coating application where adhesion to a substrate is important.

Abstract: A radiation-hardenable agent for the scratch-resistant coating of organic glasses consists of a cocondensate of vinyl trimethoxysilane or vinyl triethoxysilane and tetramethoxysilane or tetraethoxysilane, a reactive diluent which comprises at least 2 vinyl, acrylic or methacrylic groups per molecule and, if necessary, of a known photoinitiator. The agent can be prepared by forming the cocondensate in the presence of an amount of water which is at least equivalent to the methoxy or ethoxy groups present or in the presence of a small amount of a carboxylic acid, removing all volatile portions of the reaction mixture and mixing the oily siloxane remaining as residue with the other components.

Abstract: The present invention relates to an alkoxy-functional one-component RTV system in which the base polymer composition comprises a polyalkoxy-terminated diorganopolysiloxane polymer and a mono alkoxy-terminated diorganoplyisiloxane polymer. In an alternate embodiment, the base polymer composition comprises a diorganopolysiloxane polymer having just one alkoxy group and at least one hydrolyzable leaving group on the terminal silicon atoms.

Abstract: One-component, moisture-curable sealant compositions having fast cure times comprise a mixture of a silane-capped polyurethane polymer, an aminosilane cross-linking agent, and a silyl-substituted piperazinyl accelerator.

Abstract: Room temperature vulcanizing elastomers are provided which comprise 100 parts of an .alpha.,.omega.-bis(hydroxy)dimethylpolysiloxane polymer, 2 to 20 parts of methyl triacetoxysilane and an amount of a hardening accelerator comprising a water-in-oil emulsion of water in a liquid organosilicon polymer stabilized with an organosilicon surfactant such that the water comprises at least 0.01% by weight of the total mixture.

Abstract: Coupling agent and primer compositions comprising a conventional silane coupling agent (1), and a disilyl crosslinker compound (II) of the general formula(RO).sub.3 SiR'Si(OR).sub.3where RO denotes a hydrolyzable group, R' denotes a divalent organic radical, and the weight ratio of (I) to (II) is between 1:99 and 99:1 inclusive.