Abstract: Heat-curable powder coating compositions are provided which include i) at least one crystalline polyester resin present in an amount of at least 7.5 wt %; ii) at least one amorphous polyester resin present in an amount of at most 92.5 wt %; and iii) at least one peroxide present in an amount of at least 0.65 parts of peroxide in hundred parts of i)+ii) (pph), wherein the at least one crystalline polyester resin has 2-butenedioic acid ethylenic unsaturations and/or the at least one amorphous polyester resin has 2-butenedioic acid ethylenic unsaturations. The compositions may be cured to an acceptable degree at low temperature, e.g., 130° C. /20 minutes offering powder coatings that may exhibit enhanced flexibility and good adhesion. In addition, the compositions can suitably be used on heat- and/or non heat-sensitive substrates, even if the composition is highly pigmented.

Abstract: The invention relates to heat-curable powder coating composition comprising: i) at least one crystalline polyester resin present in an amount of at least 7.5 wt %; and ii) at least one amorphous polyester resin present in an amount of at most 92.5 wt %; and iii) at least one peroxide present in an amount of at least 0.

Abstract: The present invention relates to coated photonic crystal fibers including a photonic crystal fiber and a protective coating surrounding the photonic crystal fiber. The coating is obtained by curing a resin composition, which may include a urethane (meth)acrylate oligomer. The present invention also relates to a coated photonic crystal fiber including a photonic crystal fiber and a protective coating having a refractive index below 1.45.

Abstract: The present invention relates to coated photonic crystal fibers.

Abstract: The invention relates to a radiation curable powder photoresist composition comprising the components A a polymer, B a reactive compound having unsaturated groups and C a free radical photoinitiator, wherein the powder photoresist composition is soluble in a developer and wherein the powder photoresist composition has a Tg between 40 and 120° C.

Abstract: The invention relates to a powder paint binder-composition comprising a polymer that contains endomethylene tetrahydrophthalic acid units and a crosslinker.

Abstract: The invention relates to a process for coating a substrate with a powder paint composition. The powder paint particles are first charged by friction or induction in the presence of magnetic or nonmagnetic particles, are next transported and are then applied to the substrate or applied to a transfer medium and subsequently transferred to the substrate, by means of an electric field between the substrate respectively the transfer medium and the means of transport whereafter the ponder paint composition is cured or fused to obtain a powder coating.

Abstract: The invention relates to a powder paint composition comprising a polymer that contains endomethylene tetrahydrophthalic acid units and a crosslinker. The polymer is obtained by preparing an unsaturated polymer in a first step, which then reacts with cyclopentadiene at a temperature between 160 ° C and 220 ° C in a second step. The polymer preferably contains more than 10 wt.% endomethylene tetrahydrophthalic acid units and is preferably an unsaturated polymer.

Abstract: The invention relates to a binder composition for powder coatings. The binder composition is substantially based on a mixture of an unsaturated polyester and an oligomer having a plurality of allyl groups and further having at least either ether and ester groups or urethane and optionally ether groups.The oligmer is preferably an allyl ether ester being more preferably the ester of trimethylolpropane diallyl ether or pentaerythritol triallyl ether and a polycarboxylic acid (anhydride).

Abstract: A binder composition for thermosetting powder paints comprising (i) a polymer that is capable of reacting with epoxy groups and (ii) a crosslinker that contains epoxy groups, wherein the crosslinker comprises at least one C.sub.5 to C.sub.26 linear or branched aliphatic chain with the proviso that epoxy groups are carried on at least one aliphatic chain. In order to function as a crosslinker the amount of oxirane-oxygen originating from the crosslinker in the binder composition is higher than 0.1 meq/gram. The crosslinker is, for example, an epoxydized oil, a modified epoxydized oil or an epoxydized alkyd resin. A powder paint comprising the binder composition can contain a suitable catalyst and, optionally, an additional curing agent.

Abstract: The invention relates to a powder paint, comprising a polyepoxy compound, a polyester resin and customary additives, the polyester resin having an acid number ranging from 15 through 70 and a hydroxyl number of 10 or below and being substantially based on units of dicarboxylic acids, glycols and monomers of functionality three or higher, wherein the dicarboxylic acids are comprised of at least 15 mole % of isophthalic acid and at least 5 mole % of 1,4-cyclohexane dicarboxylic acid and wherein the glycols are comprised of at least 50 mole % of branched aliphatic glycols with 5-11 carbon atoms, which may optionally comprise an ester group, and at most 50 mole % of aliphatic glycol with 2-6 carbon atoms, and wherein the monomers have a functionality three or higher in an amount of at most 8 mole % of dicarboxylic acids plus glycols.

Abstract: The invention relates to a powder paint, comprising a polyepoxy compound, a polyester resin and customary additives, the polyester resin having an acid number ranging from 15 through 70 and a hydroxyl number of 10 or below and being substantially based on units of dicarboxylic acids, glycols and monomers of functionality three or higher, wherein the dicarboxylic acids are comprised of at least 15 mole % of isophthalic acid and at least 5 mole % of 1,4-cyclohexane dicarboxylic acid and wherein the glycols are comprised of at least 50 mole % of branched aliphatic glycols with 5-11 carbon atoms, which may optionally comprise an ester group, and at most 50 mole % of aliphatic glycol with 2-6 carbon atoms, and wherein the monomers have a functionality three or higher in an amount of at most 8 mole % of dicarboxylic acids plus glycols.

Abstract: The present invention relates to a powder coating based on a carboxyl-functional polyester and an epoxy-functional cross-linking agent. The cross-linking agent is the reaction product of an isocyanate-containing compound and a hydroxyglycidyl ester. The present invention also relates to the reaction product of a hydroxylglycidyl ester and an isocyanate-containing compound based on an active hydrogen-containing compound and a polyisocyanate. The present invention also relates to hydroxyglycidyl esters with a molecular weight between 132 and 500 and reaction products thereof.

Abstract: The invention relates to a triboelectrically processable powder coating based on a polyester-containing binding agent and a nitrogen-containing additive. The nitrogen-containing additive is a sterically hindered tertiary amine or aminoalcohol.

Abstract: The invention relates to a composition containing UV curable unsaturated monomers and/or oligomers, a photoinitiator and colloidal silica with an organosilane compound, a polyalkoxysilane being used as organosilane compound and the composition containing an acid catalyst.