Photocurable adhesion-promoting compositions containing organic titanates and/or organic zirconates and partially reacted alkoxysilanes and the use of the photocurable adhesion-promoting compositions to provide adhesion between metal substrates and an overlying radiation-cured sealant are disclosed.

Photocurable adhesion-promoting compositions containing organic titanates and/or organic zirconates and partially reacted alkoxysilanes and the use of the photocurable adhesion-promoting compositions to provide adhesion between metal substrates and an overlying radiation-cured sealant are disclosed.

A moisture-curable curable composition includes a perfluoro(poly)ether group-containing silane compound (a1) represented by formula (I); a perfluoro(poly)ether group-containing silane compound (a2) represented by formula (II) (in each formula, the definition of each group is as defined in the specification); (b) an organic silicon compound having at least two OR.sup.2 groups (here, R.sup.2s are each independently a hydrogen atom or a monovalent organic group at each appearance) bonded to Si atom or a partially hydrolyzed condensate thereof; and (c) a condensation catalyst.

A moisture-curable curable composition includes a perfluoro(poly)ether group-containing silane compound (a1) represented by formula (I); a perfluoro(poly)ether group-containing silane compound (a2) represented by formula (II) (in each formula, the definition of each group is as defined in the specification); (b) an organic silicon compound having at least two OR.sup.2 groups (here, R.sup.2s are each independently a hydrogen atom or a monovalent organic group at each appearance) bonded to Si atom or a partially hydrolyzed condensate thereof; and (c) a condensation catalyst.

A moisture-curable curable composition includes a perfluoro(poly)ether group-containing silane compound (a1) represented by formula (I); a perfluoro(poly)ether group-containing silane compound (a2) represented by formula (II) (in each formula, the definition of each group is as defined in the specification); (b) an organic silicon compound having at least two OR.sup.2 groups (here, R.sup.2s are each independently a hydrogen atom or a monovalent organic group at each appearance) bonded to Si atom or a partially hydrolyzed condensate thereof; and (c) a condensation catalyst.

A curable composition contains (A) a perfluoro(poly)ether group-containing silane compound having two or more Si atoms bonded to at least one group selected from the group consisting of a hydroxyl group and a hydrolyzable group, (B) a compound (other than (A)) having at least two OR.sup.2 groups bonded to an Si atom (in the formula, R.sup.2 each independently are a hydrogen atom or a monovalent organic group at each occurrence) or a partial hydrolysis condensate thereof, (C) a condensation catalyst, and (D) an inorganic filler with a primary particle size from 0.01 to 0.1 μm.

A curable composition contains (A) a perfluoro(poly)ether group-containing silane compound having two or more Si atoms bonded to at least one group selected from the group consisting of a hydroxyl group and a hydrolyzable group, (B) a compound (other than (A)) having at least two OR.sup.2 groups bonded to an Si atom (in the formula, R.sup.2 each independently are a hydrogen atom or a monovalent organic group at each occurrence) or a partial hydrolysis condensate thereof, (C) a condensation catalyst, and (D) an inorganic filler with a primary particle size from 0.01 to 0.1 μm.

A curable composition contains (A) a perfluoro(poly)ether group-containing silane compound having two or more Si atoms bonded to at least one group selected from the group consisting of a hydroxyl group and a hydrolyzable group, (B) a compound (other than (A)) having at least two OR.sup.2 groups bonded to an Si atom (in the formula, R.sup.2 each independently are a hydrogen atom or a monovalent organic group at each occurrence) or a partial hydrolysis condensate thereof, (C) a condensation catalyst, and (D) an inorganic filler with a primary particle size from 0.01 to 0.1 μm.

Provided are a polarizing plate and an optical display device comprising same, wherein: the polarizing plate comprises a polarizer, a protection film formed on the surface of the polarizer, and a barrier layer formed on the other surface of the polarizer; the barrier layer is formed of a composition comprising a (meth)acryl-based copolymer, a curing agent, and a silane coupler; and the curing agent comprises a mixture of: a polyisocyanate curing agent containing a plurality of units, each containing an entirety of an alkylene group of two or more carbon atoms having a urethane bonding; and a polyisocyanate curing agent containing an isocyanurate group.

The present invention is a normal temperature-curable hard coat composition containing at least (A) a polysilazane compound having structures shown by the following formula (1) and (B) an alkoxysilane compound. The ratio of [a] the number of Si—H bonds in the polysilazane compound and [b] the number of alkoxy groups in the alkoxysilane compound is in a range of [b]/[a]=1.5 to 3. The present invention provides the normal temperature-curable hard coat composition which has excellent workability on outdoors, cures at normal temperature, improves surface hardness of plastic materials, and is used as an alternative material to glass.

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