AMINE NEUTRALIZING AGENTS FOR LOW VOLATILE COMPOUND ORGANIC PAINTS
First Claim
1. A method of reducing the volatile organic compound (VOC) content of a latex paint formulation obtained by mixing different components which include at least one binder, at least one pigment, water and at least one neutralizing agent, said neutralizing agent being added in such an amount that the formulation has a pH of at least 8.5,characterised in thatuse is made as said neutralizing agent of at least one N-alkyldialkanol amine of the formula
RN(CH2CH2OH)2 or
RN(CH2CH(OH)CH3)2 wherein R is an alkyl or isoalkyl group with 4 to 8 carbon atoms;
- which N-alkyldialkanolamine has a vapor pressure lower than 0.1 mm Hg, preferably lower than 0.01 mm Hg, at 20°
C. and a boiling point at 760 mm Hg higher than 250°
C. so that it does not contribute to the VOC content of the formulation.
5 Assignments
0 Petitions
Accused Products
Abstract
Latex paint formulations that contain at least one N-alkyldialkanolamine as the neutralizing agent and methods for their use are disclosed. N-alkyldialkanolamines provide paint formulations that have low odor, increased open time, and reduced volatile organic compounds (VOC). N-alkyldialkanolamines also aid in pigment dispersion so less pigment dispersant is required for paint formulations in which the pigment volume concentration (PVC) of the formulation is 10% to 70%.
12 Citations
20 Claims
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1. A method of reducing the volatile organic compound (VOC) content of a latex paint formulation obtained by mixing different components which include at least one binder, at least one pigment, water and at least one neutralizing agent, said neutralizing agent being added in such an amount that the formulation has a pH of at least 8.5,
characterised in that use is made as said neutralizing agent of at least one N-alkyldialkanol amine of the formula
RN(CH2CH2OH)2 or
RN(CH2CH(OH)CH3)2wherein R is an alkyl or isoalkyl group with 4 to 8 carbon atoms; -
which N-alkyldialkanolamine has a vapor pressure lower than 0.1 mm Hg, preferably lower than 0.01 mm Hg, at 20°
C. and a boiling point at 760 mm Hg higher than 250°
C. so that it does not contribute to the VOC content of the formulation.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 18, 19, 20)
wherein R is an alkyl or isoalkyl group with 4 to 8 carbon atoms; which N-alkyldialkanolamine has a vapor pressure lower than 0.1 mm Hg, preferably lower than 0.01 mm Hg, at 20°
C. and a boiling point at 760 mm Hg higher than 250°
C. so that it does not contribute to the VOC content of the formulation.
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19. A latex paint formulation according to claim 18 which has a VOC content of less than 60 g/l based on the total volume of the paint formulation.
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20. A latex paint formulation according to claim 18 which has a VOC content of less than 75 g/l, preferably less than 73 g/l and more preferably less than 70 g/l VOC, based on the volume of the paint formulation from which the water volume has been detracted.
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13. Use of at least one N-alkyldialkanolamine of the formula
RN(CH2CH2OH)2 or
RN(CH2CH(OH)CH3)2wherein R is an alkyl or isoalkyl group with 4 to 8 carbon atoms; which N-alkyldialkanolamine has a vapor pressure lower than 0.1 mm Hg, preferably lower than 0.1 mm Hg, at 20°
C. and a boiling point at 760 mm Hg higher than 250°
C., as neutralizing agent in a latex paint formulation to reduce the volatile organic compound (VOC) content thereof, the paint formulation being obtained by mixing different components which include at least one binder, at least one pigment, water and at least one neutralizing agent.- View Dependent Claims (14, 15, 16, 17)
Specification