Branched polyester for powder coatings
The present invention relates to a carboxylic acid functional branched polyester, having an acid number or at least 80 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, an...
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| creator | CAVALIERI, ROBERTO MINESSO, ALESSANDRO CHINELLATO, ROBERTINO |
| description | The present invention relates to a carboxylic acid functional branched polyester, having an acid number or at least 80 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 isophtalic 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 90 mole% of at least one other aliphatic or cycloaliphatic diol and from 3 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, of below 35 % (at 60°), when used in combination with standard powder coating polyesters and crosslinkers. |
| format | Patent |
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| language | eng ; fre ; ger |
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| subjects | ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON CORRECTING FLUIDS DYES FILLING PASTES INKS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF MATERIALS THEREFOR WOODSTAINS |
| title | Branched polyester for powder coatings |
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