Non-VOC neutralizing agents for coatings
Paint formulations are neutralized with a non-VOC neutralizing agent. The neutralizing agent is a neutralized amino acid or intermediate, an amino phosphate, an amino phosphonate, amino sulfate, or amino sulfonate wherein the neutralizing agent has a pKa 2 of at least 9. These neutralizing agents can be used to provide a paint formulation within a pH range of 8 to 10 and do not add any volatile organic compounds to the paint formulation.
1. An aqueous paint composition comprising an effective amount of neutralized isoleucine.
2. An aqueous paint composition comprising an effective amount of a neutralizing agent having the following general formula:
wherein A represents at least one of a neutralized carboxylic acid group, a phosphate group, a phosphonate group, a sulfate group, and a sulfonate group; R 1 represents C 1 -C 6 alkyl, or C 2 -C 6 alkenyl or aryl; R 3 and R 4 represent hydrogen, C 1 -C 6 alkyl, or C 2 -C 6 alkenyl or aryl; and two of R 1 , R 3 and R 4 are combined to form either a cyclic or a heterocyclic compound, wherein said neutralizing agent has a pKa 2 of greater than 9.
3. The composition of claim 2 , wherein A is a neutralized carboxylic acid group.
4. The composition of claim 3 , wherein said neutralizing agent is selected from the group consisting of neutralized glycine, neutralized alanine, and neutralized proline.
5. The composition of claim 4 , wherein said neutralizing agent is dextralevatory.
6. The composition of claim 2 , wherein said neutralizing agent is a non-VOC (ASTM d-6886) and does not contribute VOC to the finished water based paint.
7. The composition of claim 2 , wherein said neutralizing agent is present in an amount from about 0.1-1.0 percent by weight on an actives basis of the neutralizing agent.
8. A method of neutralizing a paint formulation comprising adding to said paint formulation a composition having the following general formula:
wherein A represents at least one of a neutralized carboxylic acid group, a phosphate group, a phosphonate group, a sulfate group, and a sulfonate group; R 1 represents C 1 -C 6 alkyl, or C 2 -C 6 alkenyl or aryl; R 3 and R 4 represent hydrogen, C 1 -C 6 alkyl, or C 2 -C 6 alkenyl or aryl; and two of R 1 , R 3 and R 4 are combined to form either a cyclic or a heterocyclic compound, wherein said neutralizing agent has a pKa 2 of greater than 9.
9. The method of claim 8 , wherein said paint formulation includes pigment particles, said neutralizing agent is added to said pigment particles, and said pigment particles are subsequently added to said paint formulation.