US 9,790,317 B2Granted

Aqueous polyurethane dispersion comprising a terephthalic acid polyester

AssigneeCovestro Deutschland AG

InventorsPantea Nazaran, Rolf Gertzmann, Hiroshi Morita, Nakao Makoto

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Abstract

The present invention relates to an aqueous polyurethane dispersion obtainable by the reaction of at least: (A) one polyisocyanate with two or more isocyanate groups, (B) one polyester component comprising (B1) a polyesterpolyol with a mean molecular weight of 300 to 900 g/Mol, having structural units derived from terephthalic acid, (C) one ionic group introducing compound with at least one sulphonate and/or carboxylate group and at least one isocyanate reactive group, (D) one diol with a mean molecular weight of 62 to 400 g/Mol, (E) one polyol with a mean molecular weight of 62 to 400 g/Mol, having three or more hydroxyl groups, (F) one amino functional and/or aminohydroxyl functional compound, its use to coat a substrate and a coating obtained by using the dispersion.

Claims14

Dependent claims

An aqueous polyurethane dispersion obtained by the reaction of at least:

(A) 30 to 60% per weight of one polyisocyanate with two or more isocyanate groups,
(B) 15 to 50% per weight of one polyester component comprising
(B1) a polyesterpolyol with a weight average molecular weight of 300 to 900 g/Mol, comprises structural units derived from derived from 3-methyl-1,5 pentandiol,
(C) 1.5 to 8% per weight of one ionic group introducing compound with at least one sulphonate and/or carboxylate group and at least one isocyanate reactive group,
(D) 1 to 8% per weight of one diol with a weight average molecular weight of 62 to 400 g/Mol,
(E) 0.1 to 4% per weight of one polyol with a weight average molecular weight of 62 to 400 g/Mol, having three or more hydroxyl groups,
(F) 0.5 to 12% per weight of one amino functional and/or aminohydroxyl functional compound, wherein the sum of all percentages adds up to 100.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/416,688Filed 23 Jul 2013
Priority: EP 1217793526 Jul 2012
Published: US 2015/0175737 A125 Jun 2015
Granted: 17 Oct 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

C08G 18/6607
With compounds of group C08G18/32 or polyamines of C08G18/38: with compounds of group C08G18/3203
C08G 18/0819
Manufacture of polymers containing ionic or ionogenic groups: containing anionic or anionogenic groups
C08G 18/0823
Containing anionic or anionogenic groups: containing carboxylate salt groups or groups forming them
C08G 18/0828
Containing anionic or anionogenic groups: containing sulfonate groups or groups forming them