The invention relates to an item comprising a substrate having at least one main surface coated with a multilayer interferential coating comprising at least one layer with a refractive index higher than 1.65 and at least one layer with a refractive index lower than, or equal to, 1.65, at least one of the layers of the interferential coating being an organic-inorganic layer that has been deposited in a vacuum environment and has a thickness of at least 30 nm, said interferential coating having a thickness of at least 450 nm and/or at least 8 layers.

The present disclosure provides a styrene derivative and a preparation method thereof, and a modified organic silicone resin and a preparation method and use thereof, and belongs to the technical field of back coating solutions. The styrene derivative is specifically 2,3-difluoro-4-methoxystyrene. A fluorine atom is introduced into a benzene ring structure, and the obtained styrene derivative contains a C—F bond with a relatively high chemical bond energy, such that the styrene derivative has a relatively high thermal stability. The styrene derivative can be introduced into an organic silicone resin to make the obtained modified organic silicone resin have a higher thermal stability. The modified organic silicone resin can be used as a back coating solution to effectively improve a heat resistance of barcode thermal transfer ribbons.

A mixed composition of a compound (A1) represented by formula (a1), an organosilicon compound (B) represented by formula (b1), and an organosilicon compound (C) represented by formula (c1), wherein the mass ratio [A1/(B+C)] of the compound (A1) to the total amount of the organosilicon compound (B) and the organosilicon compound (C) is 0.060 or more.

A mixed composition of a compound (A1) represented by formula (a1), an organosilicon compound (B) represented by formula (b1), and an organosilicon compound (C) represented by formula (c1), wherein the mass ratio [A1/(B+C)] of the compound (A1) to the total amount of the organosilicon compound (B) and the organosilicon compound (C) is 0.060 or more.

In a heat-shielding film formed of addition-curing silicone resin containing organopolysiloxane, organopolysiloxane includes the combination of a plurality of units including at least a R.sup.1SiO.sub.3/2 unit (a T unit), a R.sup.2R.sup.3SiO.sub.2/2 unit (a D unit), and a R.sup.4R.sup.5R.sup.6SiO.sub.1/2 unit (a M unit) (in each unit, R.sup.1 to R.sup.6 is aliphatic hydrocarbon or hydrogen), and the molar ratio of the T unit, the D unit, and the M unit among all structural units is T:33.3 mol % to 71.4 mol %, D:11.1 mol % to 42.9 mol %, and M:7.0 mol % to 42.9 mol %.

In a heat-shielding film formed of addition-curing silicone resin containing organopolysiloxane, organopolysiloxane includes the combination of a plurality of units including at least a R.sup.1SiO.sub.3/2 unit (a T unit), a R.sup.2R.sup.3SiO.sub.2/2 unit (a D unit), and a R.sup.4R.sup.5R.sup.6SiO.sub.1/2 unit (a M unit) (in each unit, R.sup.1 to R.sup.6 is aliphatic hydrocarbon or hydrogen), and the molar ratio of the T unit, the D unit, and the M unit among all structural units is T:33.3 mol % to 71.4 mol %, D:11.1 mol % to 42.9 mol %, and M:7.0 mol % to 42.9 mol %.

A curable polyorganosiloxane composition includes (a) a polyorganosiloxane having two or more curable functional groups per molecule; (b) a crosslinking agent having per molecule two or more crosslinkable groups having reactivity with the curable functional groups of the component (a); (c) a curing catalyst capable of catalyzing a crosslinking reaction of the component (a) and the component (b); (d) a pigment which itself does not emit a fluorescent light; and (e) a UV tracer. The composition can be used as an adhesive.

A curable polyorganosiloxane composition includes (a) a polyorganosiloxane having two or more curable functional groups per molecule; (b) a crosslinking agent having per molecule two or more crosslinkable groups having reactivity with the curable functional groups of the component (a); (c) a curing catalyst capable of catalyzing a crosslinking reaction of the component (a) and the component (b); (d) a pigment which itself does not emit a fluorescent light; and (e) a UV tracer. The composition can be used as an adhesive.

An exterior body panel is provided that includes a substrate having a shape of the panel. A clear topcoat is on the panel. A cured composition of polysilazane moisture cured with interspersed disulfide moieties derived from disulfide monomers overlies the topcoat. A ceramic generating composition kit is also provided. A method for creating a ceramic coating on a topcoat overlying an exterior panel includes combining a first part including a polysilazane and a solvent in which said polysilazane is dissolved, with a second part stored separately from said first part that includes a monomer disulfide to form a reactive gel. The reactive gel cure is applied to the topcoat in ambient air. After allowing sufficient time, moisture cure of the reactive gel occurs and with evaporation of the solvent, the ceramic coating forms with disulfide bonds therein.

An exterior body panel is provided that includes a substrate having a shape of the panel. A clear topcoat is on the panel. A cured composition of polysilazane moisture cured with interspersed disulfide moieties derived from disulfide monomers overlies the topcoat. A ceramic generating composition kit is also provided. A method for creating a ceramic coating on a topcoat overlying an exterior panel includes combining a first part including a polysilazane and a solvent in which said polysilazane is dissolved, with a second part stored separately from said first part that includes a monomer disulfide to form a reactive gel. The reactive gel cure is applied to the topcoat in ambient air. After allowing sufficient time, moisture cure of the reactive gel occurs and with evaporation of the solvent, the ceramic coating forms with disulfide bonds therein.