A resist underlayer film-forming composition including: (A) component: an isopoly or heteropoly acid, or a salt thereof, or a combination thereof; and (B) component: polysiloxan, poly hafnium oxide or zirconium oxide, or a combination thereof, wherein an amount of the (A) component is 0.1 to 85% by mass of a total amount of the (A) component and the (B) component; and polysiloxan is a hydrolysis-condensation product of hydrolyzable silane of Formula (1):
R.sup.1.sub.aR.sup.2.sub.bSi(R.sup.3).sub.4−(a+b)  Formula (1)
and a hydrolyzable silane whose (a+b) is 0 is contained in a proportion of 60 to 85 mol % of a total hydrolyzable silane in Formula (1); the poly hafnium oxide is a hydrolysis-condensation product of hydrolyzable hafnium of Formula (2):
Hf(R.sup.4).sub.4  Formula (2)
and the zirconium oxide is a hydrolysis-condensation product of hydrolyzable zirconium of Formula (3) or Formula (4):
Zr(R.sup.5).sub.4  Formula (3)
ZrO(R.sup.6).sub.2  Formula (4)
or a hydrolysis-condensation product of a combination thereof.

Provided are: a crosslinked organopolysiloxane which has properties intermediate between a dimethylpolysiloxane oil and a gel-like crosslinked siloxane; and a method for producing the crosslinked organopolysiloxane. An oil-like organopolysiloxane which is produced by: adding a compound having a siloxane unit represented by formula (3) to a gel-like silicone, wherein the gel-like silicone is produced by a hydrosilylation reaction of an organopolysiloxane having an alkenyl group with an organohydrogenpolysiloxane having a hydrogen atom bonded to a silicon atom in the presence of a platinum-group metal catalyst; and then equilibrating the resultant product with an acid or alkali catalyst.

R.sup.1.sub.2SiO.sub.2/2   (3)

(R.sup.1 represents a group selected from a monovalent hydrocarbon group having no aliphatic unsaturated bond and an alkenyl group represented by the formula: —(CH.sub.2).sub.a—CH═CH.sub.2 (wherein a represents a numerical value of 0 to 6), and the average polymerization degree of formula (3) is 3 to 2,000.)

Provided are: a crosslinked organopolysiloxane which has properties intermediate between a dimethylpolysiloxane oil and a gel-like crosslinked siloxane; and a method for producing the crosslinked organopolysiloxane. An oil-like organopolysiloxane which is produced by: adding a compound having a siloxane unit represented by formula (3) to a gel-like silicone, wherein the gel-like silicone is produced by a hydrosilylation reaction of an organopolysiloxane having an alkenyl group with an organohydrogenpolysiloxane having a hydrogen atom bonded to a silicon atom in the presence of a platinum-group metal catalyst; and then equilibrating the resultant product with an acid or alkali catalyst.

R.sup.1.sub.2SiO.sub.2/2   (3)

(R.sup.1 represents a group selected from a monovalent hydrocarbon group having no aliphatic unsaturated bond and an alkenyl group represented by the formula: —(CH.sub.2).sub.a—CH═CH.sub.2 (wherein a represents a numerical value of 0 to 6), and the average polymerization degree of formula (3) is 3 to 2,000.)

Provided are: a crosslinked organopolysiloxane which has properties intermediate between a dimethylpolysiloxane oil and a gel-like crosslinked siloxane; and a method for producing the crosslinked organopolysiloxane. An oil-like organopolysiloxane which is produced by: adding a compound having a siloxane unit represented by formula (3) to a gel-like silicone, wherein the gel-like silicone is produced by a hydrosilylation reaction of an organopolysiloxane having an alkenyl group with an organohydrogenpolysiloxane having a hydrogen atom bonded to a silicon atom in the presence of a platinum-group metal catalyst; and then equilibrating the resultant product with an acid or alkali catalyst.

R.sup.1.sub.2SiO.sub.2/2   (3)

(R.sup.1 represents a group selected from a monovalent hydrocarbon group having no aliphatic unsaturated bond and an alkenyl group represented by the formula: —(CH.sub.2).sub.a—CH═CH.sub.2 (wherein a represents a numerical value of 0 to 6), and the average polymerization degree of formula (3) is 3 to 2,000.)

The present invention relates to a resin composition for coating, and a coating film comprising a cured product thereof as a coating layer. Particularly, the present invention relates to a resin composition for coating, and a coating film comprising a cured product thereof as a coating layer, wherein the resin composition for coating comprises a siloxane resin that is chemically bonded by compounds comprising alkoxysilane and diol, which comprise epoxy or acryl within the chemical structures thereof.

The present invention relates to a resin composition for coating, and a coating film comprising a cured product thereof as a coating layer. Particularly, the present invention relates to a resin composition for coating, and a coating film comprising a cured product thereof as a coating layer, wherein the resin composition for coating comprises a siloxane resin that is chemically bonded by compounds comprising alkoxysilane and diol, which comprise epoxy or acryl within the chemical structures thereof.

There is provided herein a curable polysiloxane composition comprising a reactive polysiloxane having the general structural formula (I): ##STR00001##
as described herein. There is provided a method of making the polysiloxane. In addition there is provided a curable composition including the polysiloxane.

There is provided herein a curable polysiloxane composition comprising a reactive polysiloxane having the general structural formula (I): ##STR00001##
as described herein. There is provided a method of making the polysiloxane. In addition there is provided a curable composition including the polysiloxane.

A heat- or photo-curable composition comprising: a polysiloxane which is produced by reacting a silicon compound (i) represented by the formula: R.sup.1.sub.nSi(X).sub.4-n (wherein R.sup.1 represents an alkyl group, an aryl group or the like; X represents a chlorine atom or an alkoxy group; and n represents 0 to 2) with a silicon compound (ii) represented by the formula (b) or (c) (wherein R.sup.2 to R.sup.7 independently represent an alkyl group or the like; M.sup.1 and M.sup.2 independently represent an arylene group, an alkylene group or the like; and Y.sup.1 to Y.sup.6 independently represent a chlorine atom or an alkoxy group) in the presence of an alkali catalyst or an acid catalyst; a polymerization initiator which enables the generation of an acid or a base by the action of heat or light; and a solvent. The composition enables the formation of a thick film. When the composition is coated onto a substrate, is then heated or exposed to light, is then developed if necessary, and is then heated and cured at a low temperature, a cured film can be formed. ##STR00001##

A heat- or photo-curable composition comprising: a polysiloxane which is produced by reacting a silicon compound (i) represented by the formula: R.sup.1.sub.nSi(X).sub.4-n (wherein R.sup.1 represents an alkyl group, an aryl group or the like; X represents a chlorine atom or an alkoxy group; and n represents 0 to 2) with a silicon compound (ii) represented by the formula (b) or (c) (wherein R.sup.2 to R.sup.7 independently represent an alkyl group or the like; M.sup.1 and M.sup.2 independently represent an arylene group, an alkylene group or the like; and Y.sup.1 to Y.sup.6 independently represent a chlorine atom or an alkoxy group) in the presence of an alkali catalyst or an acid catalyst; a polymerization initiator which enables the generation of an acid or a base by the action of heat or light; and a solvent. The composition enables the formation of a thick film. When the composition is coated onto a substrate, is then heated or exposed to light, is then developed if necessary, and is then heated and cured at a low temperature, a cured film can be formed. ##STR00001##