A cerium oxide nanoparticle includes a basic amino acid, an alicyclic amine, an aromatic heterocyclic compound containing a nitrogen atom in a ring structure of the aromatic heterocyclic compound, a polymer having a heterocyclic amine skeleton, or a boron compound, as a stabilizer, wherein an APHA of a 1 mass % dispersion solution is 400 or less.

[Problem]

One of the objects of the present invention is to provide a liquid addition-curable fluorosilicone composition that has a low compression set value after heating and curing, retains mechanical strength, and in particular, is suitably applied to injection molding. Further, the object of the present invention is to provide a fluorosilicone rubber obtained by heating and curing aforesaid composition, and a molded article of the fluorosilicone rubber.

[Solution]

An addition-curable fluorosilicone composition in a form of liquid at 23 C., comprises (A) an organopolysiloxane represented by the following general formula (1) and having a viscosity at 25 C. of 100 to 500,000 mPa.Math.s,

##STR00001## wherein R.sup.1 is, independently of each other, a group selected from the group consisting of an alkyl group having 1 to 8 carbon atoms, an aryl group having 6 to 12 carbon atoms, and an aralkyl group having 7 to 12 carbon atoms, x is an integer of 1 to 10, m is an integer of 0 to 100, and n is an integer of 1 to 800, provided that 5<=m+n<=800; (B) an organohydrogenpolysiloxane having two or more hydrogen atoms each bonded to a silicon atom per one molecule, in an amount such that the number of hydrogen atoms bonded to a silicon atom in Component (B) is 0.5 to 10, per one vinyl group bonded to a silicon atom in Component (A); (C) an addition-reaction catalyst in a catalytic amount; and (D) a reinforcing silica filler agent, a surface of which being treated with an organosilicon compound represented by the following general formula (2):

##STR00002## wherein R.sup.3 is, independently of each other, a group selected from the group consisting of an alkyl group having 1 to 8 carbon atoms, an aryl group having 6 to 12 carbon atoms, and an aralkyl group having 7 to 12 carbon atoms, R.sup.2 is, independently of each other, a group defined for R.sup.3 or a 3, 3, 3-trifluoropropyl group, provided that at least one R is a 3, 3, 3-trifluoropropyl group, and p is an integer that satisfies equation 1<=p<=20, in an amount of 10 to 60 parts by mass, relative to 100 parts by mass of Component (A).

Provided is a film for a transparent screen which can clearly display merchandise information, advertisement, or the like on a transparent partition or the like by projection without compromising the transmission visibility. A film for a transparent screen according to the present invention includes: a resin layer; and inorganic particles at least a portion of which is contained in an aggregated state in the resin layer, wherein primary particles of the inorganic particles have a median diameter of 0.1 to 50 nm and a maximum particle size of 10 to 500 nm, and the content of the inorganic particles is 0.015 to 1.2% by mass with respect to the resin.

Provided is a film for a transparent screen which can clearly display merchandise information, advertisement, or the like on a transparent partition or the like by projection without compromising the transmission visibility. A film for a transparent screen according to the present invention includes: a resin layer; and inorganic particles at least a portion of which is contained in an aggregated state in the resin layer, wherein primary particles of the inorganic particles have a median diameter of 0.1 to 50 nm and a maximum particle size of 10 to 500 nm, and the content of the inorganic particles is 0.015 to 1.2% by mass with respect to the resin.

The invention is directed to a detectable and stable composition comprising an organofunctional silane and/or hydrolyzate and/or partial or complete condensate thereof, a colloidal metal oxide, a water soluble organic dye having a positive charge and a counterion derived from a carboxylic acid of from 1 to 6 carbon atoms, and water. The invention is also directed to a method for determining the uniformity and film thickness of a detectable composition applied to a substrate comprising applying to the surface of the substrate the detectable composition and measuring an optical property of the applied coating, the resulting measurement being related to the uniformity of the applied composition.

The invention is directed to a detectable and stable composition comprising an organofunctional silane and/or hydrolyzate and/or partial or complete condensate thereof, a colloidal metal oxide, a water soluble organic dye having a positive charge and a counterion derived from a carboxylic acid of from 1 to 6 carbon atoms, and water. The invention is also directed to a method for determining the uniformity and film thickness of a detectable composition applied to a substrate comprising applying to the surface of the substrate the detectable composition and measuring an optical property of the applied coating, the resulting measurement being related to the uniformity of the applied composition.

The invention is directed to a detectable and stable composition comprising an organofunctional silane and/or hydrolyzate and/or partial or complete condensate thereof, a colloidal metal oxide, a water soluble organic dye having a positive charge and a counterion derived from a carboxylic acid of from 1 to 6 carbon atoms, and water. The invention is also directed to a method for determining the uniformity and film thickness of a detectable composition applied to a substrate comprising applying to the surface of the substrate the detectable composition and measuring an optical property of the applied coating, the resulting measurement being related to the uniformity of the applied composition.

The invention is directed to a detectable and stable composition comprising an organofunctional silane and/or hydrolyzate and/or partial or complete condensate thereof, a colloidal metal oxide, a water soluble organic dye having a positive charge and a counterion derived from a carboxylic acid of from 1 to 6 carbon atoms, and water. The invention is also directed to a method for determining the uniformity and film thickness of a detectable composition applied to a substrate comprising applying to the surface of the substrate the detectable composition and measuring an optical property of the applied coating, the resulting measurement being related to the uniformity of the applied composition.

A silicone rubber composition is provided comprising (A) an alkenyl-containing organopolysiloxane, (B) reinforcing silica, (C) an inorganic particle-polysiloxane composite comprising inorganic nanoparticles having a polysiloxane containing SiR.sup.2R.sup.3O.sub.3/2 and SiR.sup.4R.sup.5R.sup.6O.sub.1/2 units grafted to their surface, and (D) a curing agent. The composition cures into a transparent silicone rubber having UV-absorbing ability and heat resistance.

A silicone rubber composition is provided comprising (A) an alkenyl-containing organopolysiloxane, (B) reinforcing silica, (C) an inorganic particle-polysiloxane composite comprising inorganic nanoparticles having a polysiloxane containing SiR.sup.2R.sup.3O.sub.3/2 and SiR.sup.4R.sup.5R.sup.6O.sub.1/2 units grafted to their surface, and (D) a curing agent. The composition cures into a transparent silicone rubber having UV-absorbing ability and heat resistance.