The present invention relates to a hydrosilylation-curable silicone composition comprising: a maleate compound, and a hydrosilylation inhibitor other than the maleate compound, wherein the content of the maleate compound is in an amount of 50 to 6,000 ppm and the content of the hydrosilylation inhibitor is in an amount of 200 to 20,000 ppm, with respect to the present composition in terms of mass units, respectively. The hydrosilylation-curable silicone composition exhibits good storage stability, and can be cured to form a cured product that suffers no surface wrinkling.

A two part curable composition comprising organosiloxane polymer; water; an organosilane such as hexamethyldisilazane (HMDS) or vinyltrimethoxysilane; crosslinker; adhesion promoter and catalyst; and optionally comprising plasticizer; colorant and filler. The first part can comprise organosiloxane polymer and water. The second part can comprise crosslinker; adhesion promoter and catalyst. Either or both parts can optionally further comprise an organosilane such as hexamethyldisilazane (HMDS) or vinyltrimethoxysilane; plasticizer; colorant and filler. Cured reaction products of the two part curable organosiloxane composition has good adhesion to metallic sealing surfaces and good resistance engine oil and other automotive fluids. Cured reaction products of the two part curable organosiloxane composition can surprisingly retain physical properties after long-term exposure to temperatures between 200° C. and 250° C. and can retain physical properties after exposure to temperatures between 250° C. to 300° C. for short periods.

An allophanate group-containing polyisocyanate composition that contributes to the formation of a polyurethane resin with fewer bubbles is provided.

Disclosed is an allophanate group-containing polyisocyanate composition (C) including a reaction product of diphenylmethane diisocyanate (A) and a hydroxyl group-containing compound (B), wherein the hydroxyl group-containing compound (B) includes a hydroxyl group-containing polymethylsiloxane compound (B-1) in an amount of 1 ppm or more and 300 ppm or less.

A compound containing at least one hexahydrotriazine unit of formula (I) having at least one amidine or guanidine group and to the use thereof as a catalyst for the crosslinking of a functional compound, in particular a polymer including silane groups. The compound contains at least one hexahydrotriazine unit of formula (I) is producible in a simple process from readily available feedstocks, odorless at room temperature, non-volatile and largely non-toxic. The compound accelerates the crosslinking of functional polymers surprisingly well and by simple variation of the substituents is variable such that it has very good compatibility in different polymers as a result of which such compositions do not have a propensity for migration-based defects such as separation, exudation or substrate contamination.

A curing agent mixture is for coatings that cure at room temperature. The curing agent mixture can include (A) 10-60% by weight, preferably 20-60% by weight, more preferably 30-50% by weight, of a polysiloxane, (B) 40-90% by weight, preferably 40-80% by weight, more preferably 40-70% by weight, of an amino-functional alkoxysilane and (C) 1-10% by weight, preferably 2-7% by weight, more preferably 3-5% by weight, of a guanidine compound. The stated amounts of components (A), (B), and (C) add up to 100% by weight and are based on the curing agent mixture.

A single-component moisture-curable silicone composition including 100 parts by weight of at least one crosslinkable polydiorganosiloxane having silanol end groups, 5 to 20 parts by weight of at least one hydrophilic silica, 1 to 10 parts by weight of at least one organoalkoxysilane or organoalkoxysiloxane crosslinker that contains at least 2 alkoxysilane groups, 1 to 7 parts by weight of organoalkoxysilane or organoalkoxysiloxane that contains at least one aminoalkyl group having a primary amino group, 0.1 to 7 parts by weight of at least one tin catalyst, up to 5 parts by weight of organoalkoxysilane or organoalkoxysiloxane that contains at least two alkoxysilane groups, wherein silicone composition contains less than 1.0% by weight of water based on total composition, with proviso where reactivity in respect of hydrolysis of organoalkoxysilane or organoalkoxysiloxane is greater than reactivity in respect of hydrolysis of organoalkoxysilane or organoalkoxysiloxane crosslinker.

A method of sealing a service penetration in a structure, the method comprising applying a sealant composition around the service penetration on an exterior surface of the structure, wherein the penetration sealant composition comprises: from 5 to 40 wt % of a filler; from 20 to 80 wt % of a silicone polymer; and from 10 to 60 wt % of fire retardant compound.

The invention relates to a curable composition comprising a) at least one polymer having at least one terminal group of the general formula (I)
-A.sub.n-RSiXYZ(I),
wherein A is a divalent or trivalent bonding group containing at least one heteroatom, R is selected from divalent hydrocarbon residues having 1 to 12 carbon atoms, X, Y, Z are, independently of one another, selected from the group consisting of a hydroxyl group and C.sub.1 to C.sub.8 alkyl, C.sub.1 to C.sub.8 alkoxy, C.sub.1 to C.sub.8 acyloxy groups and CH.sub.2NR wherein N is oxygen, nitrogen or sulfur, preferably oxygen, and R is selected from C.sub.1 to C.sub.8 alkyl groups, preferably a methyl group, wherein X, Y, Z are substituents directly bound with the Si atom or the two of the substituents X, Y, Z form a ring together with the Si atom to which they are bound, and at least one of the substituents X, Y, Z is selected from the group consisting of a hydroxyl group, C.sub.1 to C.sub.8 alkoxy or C.sub.1 to C.sub.8 acyloxy groups, and n is 0 or 1; and b) at least one compound of the general formula (II) ##STR00001## wherein R.sup.1 is same or different and is, independently from one another, selected from the group consisting of a hydrogen atom and hydrocarbon residues having 1 to 12 carbon atoms, R.sup.2 is same or different and is, independently from one another, selected from hydrocarbon residues having 1 to 12 carbon atoms, Ar is selected from aryl groups, and n is an integer selected from 3 to 9; and adhesive, sealant, or coating materials comprising the composition and use thereof.

A silicone-polyether copolymer has the formula X.sub.g[Z.sub.jY.sub.o].sub.c, where each X is an independently selected silicone moiety having a particular structure, each Y is an independently selected polyether moiety, each Z is an independently selected siloxane moiety, subscript c is from 1 to 150, subscript g is >1, and each subscript j and o are independently >0 and <2, with the proviso that j+o=2 in each moiety indicated by subscript c. A method of preparing the silicone-polyether copolymer is also disclosed, and comprises reacting a polyether compound, a chain extending organosilicon compound, and an endcapping organosilicon compound in the presence of a hydrosilylation catalyst. A sealant is also disclosed, the sealant comprising the silicone-polyether copolymer and a condensation-reaction catalyst.

The present invention provides a film and/or a packaging bag from which contents that may be viscous are easily brought out, and exhibiting enough heat seal properties as well as superior anti-blocking effect and slipperiness. The sealant film has a seal layer consisting of a resin composition including the following (a) and (b), and the film satisfies the following (1) to (3). (a) Polyolefin-based resin; and (b) Silylated polyolefin resin, (1) An abundance ratio (Si/C) of silicon atoms Si to carbon atoms C included in the seal layer of 0.001 or more and 0.02 or less; (2) An abundance ratio (Si/C) of silicon atoms Si to carbon atoms C present at a surface of the seal layer of 0.05 or more and 0.2 or less; and (3) An arithmetic average roughness Ra of a surface of the seal layer of 0.07 m or more and 0.5 m or less.