Abstract: A powder coating composition blend comprising a crosslinkable composition and a catalyst system, wherein the crosslinkable composition is formed by a crosslinkable donor component A and a crosslinkable acceptor component B that are crosslinkable by a Real Michael Addition (RMA) reaction via the catalyst system, wherein the catalyst system is a separated catalyst system that comprises a catalyst precursor composition (P) and a catalyst activator composition (C) that are macrophysically separated; or wherein the crosslinkable donor component A and the crosslinkable acceptor component B are macrophysically separated.

Abstract: The invention relates to powder coating compositions suitable for low temperature powder coating crosslinking typically at curing temperature is between 75 and 140° C. which can be used for powder coating temperature-sensitive substrates like MDF, wood, plastic or temperature sensitive metal alloys.

Abstract: The invention relates to powder coating compositions suitable for low temperature powder coating crosslinking typically at curing temperature is between 75 and 140° C. which can be used for powder coating temperature-sensitive substrates like MDF, wood, plastic or temperature sensitive metal alloys.

Abstract: A thermosetting powder coating composition comprising a binder, wherein 100 parts by weight of the binder comprises (A) from 30 to 70 parts by weight of at least one carboxylic acid functional branched polyester having an acid number of at least 77 mg KOH/g, and (B) from 70 to 30 parts by weight of at least one carboxylic acid functional polyester having an acid number of lower than 50 mg KOH/g. The thermosetting powder composition may be used for coating metallic and non-metallic substrates, it provides outstanding flow and permits to obtain low gloss coatings, provides excellent mechanical properties, and exhibits good solvent resistance and weathering.

Abstract: A thermosetting and/or radiation curable powder with a binder prepared from a polyester (PE) obtained from a polyol with lower amounts of neopentyl glycol (NPG). The powder forms smooth defect free coats and is resistant to contamination from conventional NPU-rich PE.

Abstract: Carboxylic acid functional branched polyester having an acid number of at least 77 mg KOH/g, being the reaction product of a polybasic organic carboxylic acid and/or its anhydride and a branched hydroxyl functional polyester obtained from (i) 70 to 100 mole % of terephthalic acid and/or isophtalic acid and, optionally, from 0 to 30 mole % of another polycarboxylic acid, referring to the polyacid constituents, (ii) 10 to 50 mole % of ethylene glycol, 50 to 88.5 mole % of at least one other aliphatic or cycloaliphatic diol and 1.5 to 15 mole % of at least one polyol having at least 3 hydroxyl groups, referring to the polyol constituents.

Abstract: There is described a thermosetting and/or radiation curable powder with a binder prepared from a polyester (PE) obtained from a polyol with lower amounts of neopentyl glycol (NPG). The powder forms smooth defect free coats and is resistant to contamination from conventional NPG-rich PE. The powder comprises a binder of a co-reactable blend of (i) 40-98% by weight (w/w) at least one OH, COOH or ethylenically functional (fn) PE having acid or OH number 10-100 mg KOH/g, T9>40° C., where the PE is obtained from reacting a polyacid comprising 70-100% weight of terephthalic acid (TPA) and/or isophthalic acid (IPA) and 0-30% w/w another polyacid; with a polyol comprising 0-85% w/w NPG and 15-100% w/w another polyhydric polyol; (ii) 2-60% w/w at least one glycidyl or isocyanate fn polyphenoxy resin; polyepoxy and/or ?-hydroxyalkylamide crosslinker or ethylenically functional oligomer; and (iii) 0.

Abstract: The present invention relates to a carboxylic acid functional branched polyester, having an acid number of at least 77 mg KOH/g, said carboxylic acid functional branched polyester being the reaction product of a polybasic organic carboxylic acid or its anhydride, preferably trimellitic anhydride, and a branched hydroxyl functional polyester obtained from 70 to 100 mole % of terephthalic acid and/or isophthalic acid and, optionally, from 0 to 30 mole % of another polycarboxylic acid, referring to the polyacid constituents, from 10 to 50 mole % of ethylene glycol, from 50 to 87.5 mole % of at least one other aliphatic or cycloaliphatic diol and from 1.5 to 15 mole % of at least one polyol, referring to the polyol constituents, as well as to the use of this polyester to prepare powder coating compositions which present a low gloss, especially of below 35% (at 60°), when used in combination with standard powder coating polyesters and crosslinkers.