A fluoropolyether group-containing compound represented by formula (1) or (2) below:

##STR00001##

wherein R.sup.Si is represented by formula (Si), and the symbols are as defined in the description

—X.sup.1—SiR.sup.a1.sub.p1R.sup.b1.sub.q1R.sup.c1.sub.r1  (S1).

A fluoropolyether group-containing compound represented by formula (1) or (2) below:

##STR00001##

wherein R.sup.Si is represented by formula (Si), and the symbols are as defined in the description

—X.sup.1—SiR.sup.a1.sub.p1R.sup.b1.sub.q1R.sup.c1.sub.r1  (S1).

The present invention provides organofunctional siloxane coupling agents, dipodal siloxanes, siloxane block copolymers and a specific method for preparing these organofunctional siloxanes through an addition reaction of hydrido alkoxysilane and organofunctional disiloxanes to an organocyclosiloxane with a catalyst. The addition reaction of the current invention does not result in polymerization and therefore the novel siloxane couplings agents are free of cyclosiloxanes and polymeric siloxanes. This makes them apt for adhesives, coatings and sealant applications. The present invention also relates to the use of these organofunctional siloxane compounds for the treatment of fillers and surfaces.

The present invention provides organofunctional siloxane coupling agents, dipodal siloxanes, siloxane block copolymers and a specific method for preparing these organofunctional siloxanes through an addition reaction of hydrido alkoxysilane and organofunctional disiloxanes to an organocyclosiloxane with a catalyst. The addition reaction of the current invention does not result in polymerization and therefore the novel siloxane couplings agents are free of cyclosiloxanes and polymeric siloxanes. This makes them apt for adhesives, coatings and sealant applications. The present invention also relates to the use of these organofunctional siloxane compounds for the treatment of fillers and surfaces.

A dispersion contains: (a) a polyorganosiloxane with at least 90 mole % dimethyl D units and viscosity of one kPa*s or more dispersed as 0.5-20 micrometer particles; (b) a condensation product of: (i) a polysiloxane resin (Mw of 4,000-50,000) with composition: (R.sub.3SiO.sub.1/2).sub.a(SiO.sub.4/2).sub.b(ZO.sub.1/2).sub.c where a is 0.30-0.60, b is 0.40-0.70, c is 0.05-0.20, a+b is one, R is selected from hydrogen, C.sub.1−30 alkyl groups and aryl groups, and Z is selected from H, and C.sub.18 alkyls; and (ii) a polyoxyalkylene polymer (Mn of 4,500-50,000) with composition: A—O—(C.sub.2H.sub.4O).sub.e(C.sub.3H.sub.6O).sub.p—A′ where e/p is 1-9, A and A′ are selected from hydrogen, alkyl, substituted alkyl, aryl, and substituted aryl groups and at least one of A and A′ is H; (c) non-aqueous fluid carrier miscible with (a); and (d) monoterpene; the weight-ratio of (c) to (b) is 0.5-1; weight-ratio of (b) and (c) to (a) is 0.01-0.50; and the composition contains below one ppm aromatic solvent.

A dispersion contains: (a) a polyorganosiloxane with at least 90 mole % dimethyl D units and viscosity of one kPa*s or more dispersed as 0.5-20 micrometer particles; (b) a condensation product of: (i) a polysiloxane resin (Mw of 4,000-50,000) with composition: (R.sub.3SiO.sub.1/2).sub.a(SiO.sub.4/2).sub.b(ZO.sub.1/2).sub.c where a is 0.30-0.60, b is 0.40-0.70, c is 0.05-0.20, a+b is one, R is selected from hydrogen, C.sub.1−30 alkyl groups and aryl groups, and Z is selected from H, and C.sub.18 alkyls; and (ii) a polyoxyalkylene polymer (Mn of 4,500-50,000) with composition: A—O—(C.sub.2H.sub.4O).sub.e(C.sub.3H.sub.6O).sub.p—A′ where e/p is 1-9, A and A′ are selected from hydrogen, alkyl, substituted alkyl, aryl, and substituted aryl groups and at least one of A and A′ is H; (c) non-aqueous fluid carrier miscible with (a); and (d) monoterpene; the weight-ratio of (c) to (b) is 0.5-1; weight-ratio of (b) and (c) to (a) is 0.01-0.50; and the composition contains below one ppm aromatic solvent.

An easy-cleaning coating, an easy cleaning coating having anti-fogging properties, and an easy-cleaning, anti-reflective coating.

An easy-cleaning coating, an easy cleaning coating having anti-fogging properties, and an easy-cleaning, anti-reflective coating.

This surface treatment agent using a compound represented by formula (1) or (2) can, even without having a hydrolyzable group, form a water repellent and oil repellent layer having excellent abrasion resistance under mild conditions such as at room temperature. ##STR00001##
[Rf represents a monovalent or divalent fluorooxyalkylene group-containing polymer residue, Y.sub.1 and Y.sub.2 each represent a single bond or a divalent hydrocarbon group, Q represents a group that has a Si-containing structure having a valence of 2-4, Si, or C, X represents an epoxy-containing group, k represents 0-2, m represents 1-5, n represents 1-3, Z represents H, —SiR.sub.3 (R represents an alkyl group or a phenyl group), or —W.sub.1-Q′-W.sub.2—X′ (X′ represents X or —SiR.sub.3, W.sub.1 and W.sub.2 each represent a single bond or a divalent hydrocarbon group, Q′ represents a divalent group having a Si-containing structure), and α represents 1 or 2].

This surface treatment agent using a compound represented by formula (1) or (2) can, even without having a hydrolyzable group, form a water repellent and oil repellent layer having excellent abrasion resistance under mild conditions such as at room temperature. ##STR00001##
[Rf represents a monovalent or divalent fluorooxyalkylene group-containing polymer residue, Y.sub.1 and Y.sub.2 each represent a single bond or a divalent hydrocarbon group, Q represents a group that has a Si-containing structure having a valence of 2-4, Si, or C, X represents an epoxy-containing group, k represents 0-2, m represents 1-5, n represents 1-3, Z represents H, —SiR.sub.3 (R represents an alkyl group or a phenyl group), or —W.sub.1-Q′-W.sub.2—X′ (X′ represents X or —SiR.sub.3, W.sub.1 and W.sub.2 each represent a single bond or a divalent hydrocarbon group, Q′ represents a divalent group having a Si-containing structure), and α represents 1 or 2].