The present invention provides a novel metal alkoxide having excellent hydrolysis resistance, and a crosslinking agent composition for aqueous resin and an aqueous resin composition each using the same. A metal alkoxide represented by the following formula (1-1), (1-2), or (1-3) and having a mass average molecular weight of 800 to 8,500 is used:
Ti(OA).sub.4  (1-1)
Zr(OA).sub.4  (1-2)
Al(OA).sub.3  (1-3) wherein A's are each independently a residue resulting from removal of a hydroxy group from a polyalkylene glycol monohydrocarbyl ether represented by the following general formula (1a):
R.sup.11(OCHR.sup.12CH.sub.2).sub.nOH  (1a) wherein R.sup.11 is an alkyl group having 1 to 4 carbon atoms or a phenyl group; R.sup.12 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; and n is an integer of 4 to 45.

Described herein is a process for preparing inorganic metal-containing films including bringing a solid substrate in contact with a compound of general formula (I) or (II) in the gaseous state ##STR00001## where A is NR.sub.2 or OR with R being an alkyl group, an alkenyl group, an aryl group, or a silyl group, E is NR or O, n is 1, 2 or 3, and R′ is hydrogen, an alkyl group, an alkenyl group, an aryl group, or a silyl group, wherein if n is 2 and E is NR or A is OR, at least one R in NR or OR bears no hydrogen atom in the 1-position.

The present invention relates to a composition for producing a zinc oxide thin film containing a group 2 element, said composition being a solution in which a partial hydrolysate of an organic zinc compound represented by formula (1) and a group 2 element are dissolved in an organic solvent. The solution can additionally include a group 13 element. Formula (1): R1-Zn-R1 (in the formula, R1 is a straight-chain or branched alkyl group having 1-7 carbon atoms). Provided are: a composition for producing a zinc oxide thin film containing a group 2 element, said composition making it possible to form a zinc oxide thin film containing a group 2 element by performing coating and film formation with one solution; and a production method for the composition.

The present invention relates to a composition for producing a zinc oxide thin film containing a group 2 element, said composition being a solution in which a partial hydrolysate of an organic zinc compound represented by formula (1) and a group 2 element are dissolved in an organic solvent. The solution can additionally include a group 13 element. Formula (1): R1-Zn-R1 (in the formula, R1 is a straight-chain or branched alkyl group having 1-7 carbon atoms). Provided are: a composition for producing a zinc oxide thin film containing a group 2 element, said composition making it possible to form a zinc oxide thin film containing a group 2 element by performing coating and film formation with one solution; and a production method for the composition.

Catalyst activators and methods for their preparation and their use in processes for polymerizing olefms are described. In particular, catalyst activators derived from aluminum alkyls and their use with metallocene type catalyst systems and/or conventional-type transition metal catalyst systems are described.

An aluminum catalyst is obtained by reacting at least one compound of a specific alkylaluminum compound and a specific hydridoaluminum compound with a specific hydroxy compound. The specific hydroxyl compound is a specific 2-cycloalkyl-6-arylphenol or a specific di(2-cycloalkyl-6-arylphenol). A method for producing isopulegol or optically active isopulegol includes selectively cyclizing citronellal using the aluminum catalyst.

An aluminum catalyst is obtained by reacting at least one compound of a specific alkylaluminum compound and a specific hydridoaluminum compound with a specific hydroxy compound. The specific hydroxyl compound is a specific 2-cycloalkyl-6-arylphenol or a specific di(2-cycloalkyl-6-arylphenol). A method for producing isopulegol or optically active isopulegol includes selectively cyclizing citronellal using the aluminum catalyst.

The present application discloses compositions and methods of synthesis and use of .sup.18F- or .sup.19F-labeled molecules of use in PET, SPECT and/or MR imaging. Preferably, the .sup.18F or .sup.19F is conjugated to a targeting molecule by formation of a complex with a group IIIA metal and binding of the complex to a bifunctional chelating agent, which may then be directly or indirectly attached to the targeting molecule. In other embodiments, the .sup.18F or .sup.19F labeled moiety may comprise a targetable construct used in combination with a bispecific antibody to target a disease-associated antigen. The disclosed methods and compositions allow the simple and reproducible labeling of molecules at very high efficiency and specific activity in 30 minutes or less. In preferred embodiments, the bifunctional chelating agent bound to .sup.18F- or .sup.19F-metal complex may be conjugated to the molecule to be labeled at a reduced temperature, e.g. room temperature.

A curable and hygroscopic resin composition for sealing electronic devices, having at least a (meth)acrylate oligomer (a) having the number-average molecular weight of 1,500 to 5,000, a low molecular weight (meth)acrylate (b) having an average molecular weight of 170 to 500, a moisture-reactive organometallic compound (c), and a polymerization initiator (d), wherein the (meth)acrylate oligomer (a) and the low molecular weight (meth)acrylate (b) are multifunctional (meth)acrylates in which the number of (meth)acryloyl groups is from 1.5 to 3 in one molecule of each of the (meth)acrylate oligomer (a) and the low molecular weight (meth)acrylate (b); a sealing resin; and an electronic device.

Provided is an aluminum precursor for thin-film deposition having a structure of formula (I) or (II), wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, and R.sub.7 each independently represent a hydrogen atom, C.sub.1˜C.sub.6 alkyl, halo-C.sub.1˜C.sub.6 alkyl, C.sub.2˜C.sub.5 alkenyl, halo-C.sub.2˜C.sub.5 alkenyl, C.sub.3˜C.sub.10 cycloalkyl, halo-C.sub.3˜C.sub.10 cycloalkyl, C.sub.6˜C.sub.10 aryl, halo-C.sub.6˜C.sub.10 aryl or —Si(R.sub.0).sub.3, and wherein R.sub.0 is C.sub.1˜C.sub.6 alkyl or halo-C.sub.1˜C.sub.6 alkyl. According to the present invention, based on the interaction principle between molecules, aluminum precursors for thin-film deposition are provided, which have a good thermal stability, are not susceptible to decomposition and convenient for storage and transportation, have good volatility at a high temperature, and are excellent in film formation.

##STR00001##