The invention relates to silane mixtures comprising a silane of the formula I
((R.sup.1).sub.y(R.sup.2).sub.3-ySi—R.sup.3—SH  (I)
and a silane of the formula II
(R.sup.1).sub.y(R.sup.2).sub.3-ySi—R.sup.3—(S—R.sup.4).sub.z—Si(R.sup.1).sub.y(R.sup.2).sub.3-y  (II)
where the molar ratio of silane of the formula I to silane of the formula II is 20:80-85:15. The silane mixture according to the invention can be prepared by mixing the silanes of the formula I and silanes of the formula II.

The present invention relates to azeotropic blends and pseudoazeotropic blends and to coating compositions including such blends. In one aspect, an azeotropic blend or a pseudoazeotropic blend consists essentially of hexamethyldisiloxane and a second component selected from the following: isobutanol, n-propyl acetate, n-butanol, and 1-methoxy-2-propanol.

The present invention relates to azeotropic blends and pseudoazeotropic blends and to coating compositions including such blends. In one aspect, an azeotropic blend or a pseudoazeotropic blend consists essentially of hexamethyldisiloxane and a second component selected from the following: isobutanol, n-propyl acetate, n-butanol, and 1-methoxy-2-propanol.

An object is to provide a heat conductive sheet having good handleability when mounting between the heating element and the heat dissipator, and softness that enables the distortion of the heating element, the heat dissipator, and the like to be suppressed in use. The heat conductive sheet contains: a matrix comprising a cured product of organopolysiloxane; and heat conductive fillers comprising anisotropic fillers with their major axes oriented in the thickness direction, and has a load property P represented b formula (1) below of 0.1 to 0.7: Load property P=(F.sub.30−F.sub.20)/F.sub.10 (1) wherein F.sub.10 is a load of the heat conductive sheet at 10% compression, F.sub.20 is a load of the heat conductive sheet at 20% compression, and F.sub.30 is a load of the heat conductive sheet at 30% compression.

An object is to provide a heat conductive sheet having good handleability when mounting between the heating element and the heat dissipator, and softness that enables the distortion of the heating element, the heat dissipator, and the like to be suppressed in use. The heat conductive sheet contains: a matrix comprising a cured product of organopolysiloxane; and heat conductive fillers comprising anisotropic fillers with their major axes oriented in the thickness direction, and has a load property P represented b formula (1) below of 0.1 to 0.7: Load property P=(F.sub.30−F.sub.20)/F.sub.10 (1) wherein F.sub.10 is a load of the heat conductive sheet at 10% compression, F.sub.20 is a load of the heat conductive sheet at 20% compression, and F.sub.30 is a load of the heat conductive sheet at 30% compression.

A crosslinkable composition containing: a liquid monocyclic olefin ring-opened polymer (A) having a reactive group at a polymer chain end thereof and a weight-average molecular weight (Mw) of 1,000 to 50,000; and a crosslinkable compound (B) having, in the molecule, two or more functional groups reactive with the reactive group at the polymer chain end of the monocyclic olefin ring-opened polymer (A).

A crosslinkable composition containing: a liquid monocyclic olefin ring-opened polymer (A) having a reactive group at a polymer chain end thereof and a weight-average molecular weight (Mw) of 1,000 to 50,000; and a crosslinkable compound (B) having, in the molecule, two or more functional groups reactive with the reactive group at the polymer chain end of the monocyclic olefin ring-opened polymer (A).

A curable composition including (A) a compound having two or more alkenyl groups and a perfluoro(poly)ether group in one molecule, wherein the perfluoro(poly)ether group is represented by formula: —(OC.sub.6F.sub.12).sub.a—(OC.sub.5F.sub.10).sub.b—(OC.sub.4F.sub.8).sub.c—(OC.sub.3X.sup.10.sub.6).sub.d—(OC.sub.2F.sub.4).sub.e—(OCF.sub.2).sub.f—, a, b, c and d are each independently an integer of 0 to 30, e and f are each independently an integer of 1 to 200, the sum of a, b, c, d, e and f is at least 5, the occurrence order of the respective repeating units in parentheses with the subscript a, b, c, d, e or f is not limited in the formula, a ratio of e to f is 1.0 or more, and each X.sup.10, at each occurrence, is independently a hydrogen atom, a fluorine atom or a chlorine atom, (B) an organosilicon compound which has two or more hydrogen atoms each bonding to a silicon atom, in one molecule, and (C) a catalyst.

A curable composition including (A) a compound having two or more alkenyl groups and a perfluoro(poly)ether group in one molecule, wherein the perfluoro(poly)ether group is represented by formula: —(OC.sub.6F.sub.12).sub.a—(OC.sub.5F.sub.10).sub.b—(OC.sub.4F.sub.8).sub.c—(OC.sub.3X.sup.10.sub.6).sub.d—(OC.sub.2F.sub.4).sub.e—(OCF.sub.2).sub.f—, a, b, c and d are each independently an integer of 0 to 30, e and f are each independently an integer of 1 to 200, the sum of a, b, c, d, e and f is at least 5, the occurrence order of the respective repeating units in parentheses with the subscript a, b, c, d, e or f is not limited in the formula, a ratio of e to f is 1.0 or more, and each X.sup.10, at each occurrence, is independently a hydrogen atom, a fluorine atom or a chlorine atom, (B) an organosilicon compound which has two or more hydrogen atoms each bonding to a silicon atom, in one molecule, and (C) a catalyst.

A polyphenylene sulfide resin composition for automotive cooling parts contains, with respect to 100 parts by weight of a polyphenylene sulfide resin (A): 30 to 110 parts by weight of glass fibers (B); and 0.1 to 3 parts by weight of a silane compound (C) having a functional group selected from an amino group and an isocyanate group. In this polyphenylene sulfide resin composition, the PPS resin (A) has a number-average molecular weight of 7,000 to 14,000, and gives a residue amount of 0.05 to 1.0% by weight when dissolved in 20-fold amount by weight of 1-chloronaphthalene at 250° C. for 5 minutes and subsequently subjected to heat pressure filtration through a PTFE membrane filter having a pore size of 1 μm.