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US 12,319,836 B2Granted
Intumescent flame-retardant clearcoat formulations
AssigneeClariant International Ltd.
InventorsKlaus Bender, Harald Bauer, Andreas Termath
Life of this patent
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Abstract
The invention relates to intumescent flame-retardant clearcoat formulations containing 20% to 88.5% by weight of an aqueous synthetic resin formulation, 10% to 60% by weight of a phosphoric partial ester, 0.5% to 20% by weight of a polyol and 1% to 30% by weight of further ingredients, and to the use thereof.
Claims20
An intumescent flame-retardant clearcoat formulation comprising
- 30% to 75% by weight of an aqueous synthetic resin formulation,
- 20% to 50% by weight of a phosphoric partial ester,
- 3% to 15% by weight of at least one polyol, and
- 2% to 20% by weight of further ingredients,
- wherein the phosphoric partial ester is a partial ester of polyphosphoric acid and at least 2 polyols, the polyols having an average hydroxyl group content of at least 40% by weight, calculated as the ratio of hydroxyl group molecular weight to total polyol molecular weight multiplied by 100%.
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An intumescent flame-retardant clearcoat formulation containing
- 30% to 75% by weight of a nitrogen-containing aqueous synthetic resin formulation selected from a melamine-formaldehyde resin, a urea-formaldehyde resin, an etherified melamine-formaldehyde resin, an etherified urea-formaldehyde resin, and mixtures of these,
- 20% to 45% by weight of a phosphoric partial ester,
- 3% to 15% by weight of at least one polyol selected from pentaerythritol, dipentaerythritol, tripentaerythritol, polycondensates of pentaerythritol, mixtures of pentaerythritol-based esters, glycerol, oligomeric glycerol, xylitol, sorbitol, mannitol, isomalt, lactitol, glucitol, threitol, erythritol, arabitol, inositol, polyvinyl alcohol, ethylene oxide-propylene oxide polyols, and mixtures of these, and
- 2% to 20% by weight of further ingredients,
- wherein the phosphoric partial ester is a partial ester of polyphosphoric acid and at least 2 polyols, the polyols having an average hydroxyl group content of at least 40% by weight, calculated as the ratio of hydroxyl group molecular weight to total polyol molecular weight multiplied by 100%.
2 more elements
Dependencies are inferred from the claim text.