Provided is an antifouling composition including a polysilazane-based compound (A) and a both terminal carboxy-modified silicone (B), the content of the component (B) being from 0.01 to 10 parts by mass based on 100 parts by mass of the total amount of the component (A), and the antifouling composition serves as a sheet-like antifouling layer-forming material. The antifouling composition is able to form a sheet-like antifouling layer having favorable surface state and curability and also having excellent water repellency such that even when a tilt angle is small, water droplets can be slipped off.

An alkoxysilyl group-containing organic silazane compound having an average composition represented by formula (1) below: ##STR00001##
wherein R.sup.1 is a monovalent hydrocarbon group, R.sup.2 is a divalent hydrocarbon group, Y is a group represented by formula (6) or (7) below: ##STR00002##
wherein R.sup.3, R.sup.4, and R.sup.6 are a monovalent hydrocarbon group, X is an oxygen atom or a divalent hydrocarbon group, p is an integer of 0 to 9, and n is 0, 1, or 2, R.sup.5 is a monovalent hydrocarbon group, m is 0 or 1, r is 0, 1, or 2, and a and b are numbers which satisfy 0<a≤1, 0≤b<1, and a+b=1.

An alkoxysilyl group-containing organic silazane compound having an average composition represented by formula (1) below: ##STR00001##
wherein R.sup.1 is a monovalent hydrocarbon group, R.sup.2 is a divalent hydrocarbon group, Y is a group represented by formula (6) or (7) below: ##STR00002##
wherein R.sup.3, R.sup.4, and R.sup.6 are a monovalent hydrocarbon group, X is an oxygen atom or a divalent hydrocarbon group, p is an integer of 0 to 9, and n is 0, 1, or 2, R.sup.5 is a monovalent hydrocarbon group, m is 0 or 1, r is 0, 1, or 2, and a and b are numbers which satisfy 0<a≤1, 0≤b<1, and a+b=1.

The present invention relates to the formation of silazane coatings. The invention provides a polysilazane coating method for limiting fragmentation of polysilazane and an assembly for performing said polysilazane coating method for limiting fragmentation of polysilazane.

The present invention relates to the formation of silazane coatings. The invention provides a polysilazane coating method for limiting fragmentation of polysilazane and an assembly for performing said polysilazane coating method for limiting fragmentation of polysilazane.

Novel N-alkyl substituted perhydridocyclic silazanes, oligomeric N-alkyl perhydridosilazane compounds, and N-alkylaminodihydridohalosilanes, and a method for their synthesis are provided. The novel compounds may be used to form high silicon nitride content films by thermal or plasma induced decomposition.

Novel N-alkyl substituted perhydridocyclic silazanes, oligomeric N-alkyl perhydridosilazane compounds, and N-alkylaminodihydridohalosilanes, and a method for their synthesis are provided. The novel compounds may be used to form high silicon nitride content films by thermal or plasma induced decomposition.

Provided is a composition for forming a silica layer, the composition containing a silicon-containing polymer and a solvent, wherein a silica layer formed of the composition for forming the silica layer satisfies Relation 1. The definition of Relation 1 is as described in the specification. The definition of Relation 1 is the same as described in the specification.

Provided is a barrier film and a manufacturing method thereof. The barrier film has a structure comprising a polysilazane barrier layer, which can exhibit excellent running properties in a so-called roll-to-roll process or the like, and can maintain or improve the performance of the barrier layer even during an unwinding and/or winding process, and the like.

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.

##STR00001##