Water dispersible ionic and nonionic polyamide modified polyurethane resins for use in coating composition

• US 5,610,224 A
• Filed: 07/29/1996
• Issued: 03/11/1997
• Est. Priority Date: 10/30/1992
• Status: Expired due to Fees

• Current Assignee: BASF Corporation (BASF SE)
• Original Assignee: BASF Corporation (BASF SE)
• Inventors: Menovcik, Gregory G., DePue, Jeffrey S.
• Primary Examiner(s): WOODWARD, ANA LUCRECIA
• Application Number:
  US08/695,324
• Time in Patent Office: 225 Days
• Field of Search: 525/424, 525/417, 525/131, 524/538, 524/507, 524/514
• US Class Current: 524/538
• CPC Class Codes: C08G 18/0823 containing carboxylate salt groups or groups forming them
• CPC Class Codes: C08G 18/4054 Mixtures of compounds of group C08G18/60 with other macromolecular compounds
• CPC Class Codes: C08G 18/4833 Polyethers containing oxyethylene units
• CPC Class Codes: C08G 18/60 Polyamides or polyester-amides
• CPC Class Codes: C08L 2666/16 Addition or condensation polymers of aldehydes or ketones according to C08L59/00 - C08L61/00; Derivatives thereof
• CPC Class Codes: C09D 175/04 Polyurethanes

Abstract

The present invention relates to ionic and nonionic polyamide modified polyurethane polymers for use in coating compositions, a method for forming the polymer and coating compositions containing these polymers. The polyamide modified polyurethane polymers of the present invention include polyamide formed from aromatic, aliphatic, or cycloaliphatic anhydrides or diacid halides and an amine containing compound such as amino alcohol, amino thiol, diamine or mixtures thereof, wherein the reactive terminii of the polyamide ere substituted by hydroxyl or thiol functional groups, together with a chain extending alcohol and diisocyanate functional monomer.

Claims

1. An aqueous coating composition comprising

A. a water dispersible polyamide modified polyurethane resin which is the reaction product of

a) 1 to 25% by weight of a polyamide compound having both reactive termini substituted with hydroxyl groups which is the reaction product of

i) a compound selected from the group consisting of aromatic, aliphatic, and cycloaliphatic anhydrides, and diacid halides and

ii) 30 to 70% of amine containing monomers selected from the group consisting of amino monools, and mixtures thereof,

b) 30 to 70% by weight of a chain extending polymeric alcohol selected from the group consisting of polyester polyols, polyether polyols, polycarbonate polyols, and mixtures thereof,

c) 15 to 30% by weight of a diisocyanate monomer, and

d) a hydrophilic compound, to provide water miscibility, selected from the group consisting of nonionic compounds selected from the group consisting of polyethylene imine, polyaziridine, polyvinyl methyl ether, and mixtures thereof, and anionic compounds selected from the group consisting of primary alkylamines, secondary alkylamines, tertiary alkylamines, carboxyl containing compounds, and

mixtures thereof, wherein the compounds (d) having non-ionizable functional groups are present in an amount between 5 and 30% by weight, when used, and the alkylamines when used as compound (d) are present in an amount between 5 and 30% by weight, and

B. a crosslinking agent.

2. The coating composition of claim 1, wherein the polyamide compound (a) has a molecular weight of between about 200 and about 2000.

3. The coating composition of claim 1, wherein the diisocyanate functional monomer (c) is an aliphatic or cycloaliphatic diisocyanate compound.

4. The coating composition of claim 1, wherein the crosslinking agent is selected from the group consisting of aminoplast and polyisocyanate crosslinking agents.

5. The coating composition of claim 1, wherein the coating is a basecoat composition.

6. The coating composition of claim 1, wherein the coating is a clearcoat composition.