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NACURE® & K-CURE®
Acid & Blocked Acid Catalysts
Why Use Catalysts?
Today's need for high solids and waterborne coatings requires greater use of high reactivity, low viscosity resins and crosslinkers. Conversion of these systems into tough, chemically resistant, high performance coatings at reduced cure temperatures can be accomplished with the use of a catalyst.
Acrylics, alkyds, epoxies and polyesters with reactive functional groups, such as hydroxyl, carbamate or amide can be reacted with melamine, urea, glycoluril and benzoguanamine crosslinkers. Selection of the proper catalyst can facilitate the crosslinking reaction resulting in the following benefits:
- Shorter cure schedules
- Lower cure temperatures for thermoset high solids and waterborne coatings
- Improved hardness, gloss, humidity and corrosion resistance
- Improved mechanical properties
King Industries continues to develop catalysts to meet the ever expanding needs of a rapidly changing market.
Free Acid Or Latent Catalyst?
While acid catalysts provide the fastest cure and lower curing temperatures, blocked catalysts are typically chosen for systems requiring greater package stability. In addition, troublesome catalyst-pigment interaction can be reduced or eliminated.
NACURE® & K-CURE® Acid Catalysts |
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| PRODUCT | Acid Type |
% |
Minimum |
Attributes/Uses |
Technical |
NACURE 155 |
DNNDSA |
55 |
RT |
General purpose catalyst. Excellent water, detergent and salt spray resistance. |
 |
NACURE 1051 |
DNNSA |
50 |
125°C |
Best water and corrosion resistance. Recommended for high temperature applications on metal. |
|
NACURE 5076 |
DDBSA |
70 |
RT |
Complies with FDA 21 CFR, Sec. 175.300 (b) (3) xiii (a&b) |
|
NACURE 4054 |
AAP |
50 |
110°C |
Weak acid for high NH/polymeric melamines and phenolic crosslinkers. |
|
NACURE 4046 |
Phosphate |
17 |
80°C |
Complies with FDA 21 CFR, Sec. 175.300 (b) (3) xiii (a&b) |
|
K-CURE 1040 |
p-TSA |
40 |
RT |
Highest gloss. Fastest cure. Excellent weathering and exterior durability. |
|
K-CURE 1040W |
p-TSA |
40 |
RT |
As above, non-flammable for waterborne applications. |
|
K-CURE 129B |
Mixed Acids |
50 |
RT |
Fastest cure. |
|
NACURE |
Alkyl Acid |
100 |
80˚C |
Broad solubility and excellent adhesion, Good package stability |
|
RT= Room Temperature, cures are possible at catalyst levels of 4-10% |
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NACURE Blocked Acid Catalysts
NACURE® Blocked Acid Catalysts |
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DNNDSA |
|||||
PRODUCT |
Acid Type |
% |
Minimum |
Attributes/Uses |
Technical |
NACURE X49-110 |
DNNDSA Isobutanol Isopropanol |
25 |
90°C |
Best overall properties. Excellent water and corrosion resistance, and adhesion. |
|
NACURE 3525 |
DNNDSA Isobutanol Isopropanol |
25 |
120°C |
Better solubility than X49-110, slower curing. Good salt spray resistance and adhesion. |
|
NACURE 3327 |
DNNDSA Isobutanol Isopropanol |
25 |
107°C |
Better solubility than other amine blocked DSA catalysts. |
|
NACURE 3483 |
DNNDSA Xylene |
25 |
120°C |
Low conductivity for electrostatic spray. High gloss, reduced pigment interaction. |
|
DNNSA |
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NACURE 1323 |
DNNSA Xylene |
21 |
150°C |
High temperature applications. Excellent solubility in aromatic and aliphatic solvents. |
|
NACURE 1419 |
DNNSA Xylene/MIBK |
30 |
150°C |
Electrostatic spray. High bake applications for water, detergent and salt spray resistance. |
|
NACURE 1557 |
DNNSA Butanol 2-Butoxyethanol |
25 |
150°C |
Resolves solvent popping in thick films. Excellent humidity and detergent resistance. |
|
NACURE 1953 |
DNNSA Butanol 2-Butoxyethanol |
25 |
150°C |
High bake amino crosslinked systems such as coil coatings and metal decorating. |
|
DDBSA |
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NACURE 5225 |
DDBSA< Isopropanol |
25 |
120°C |
Best solubility in high solids enamels. Good solubility in aliphatic solvents. |
|
NACURE 5414 |
DDBSA< Xylene |
25 |
130°C |
Polymeric blocked. Excellent electrostatic spray (non-aqueous). Good intercoat adhesion. |
|
NACURE 5528 |
DDBSA Isopropanol |
25 |
120°C |
Broad solubility. |
|
NACURE 5925 |
DDBSA Isopropanol |
25 |
120°C |
Complies with FDA 21 CFR, Sec. 175.300 (b) (3) xiii (a&b) |
|
p-TSA |
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NACURE 2107 |
p-TSA Isopropanol |
25 |
90°C |
Good metal mark resistance. |
|
NACURE 2500 |
p-TSA Isopropanol |
26 |
80°C |
Low temperature cure. |
|
NACURE 2501 |
TSA Methanol Isopropanol |
25 |
80°C |
Slightly higher resistivity than 2500. Better ketone solubility. |
|
NACURE 2522 |
p-TSA Isopropanol Methanol |
25 |
80°C |
Partially neutralized to provide faster cure and reduce wrinkling at higher curing temperatures. |
|
NACURE 2530 |
p-TSA Methanol Isopropanol |
25 |
80°C |
Low temperature cure. |
|
NACURE 2547 |
p-TSA< Water |
25 |
107°C |
Readily soluble in waterborne systems. Solvent-free. |
|
NACURE 2558 |
p-TSA Ethylene Glycol |
25 |
80°C |
Excellent control of popping and blistering. |
|
NACURE XC-8224 |
Mixed Acids Water |
25 |
80°C |
Fast cure response and solubility in waterborne coatings. |
|
Phosphates |
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NACURE 4167 |
Acid Phosphate Isopropanol Isobutanol |
25 |
80°C |
Blocked phosphate for high NH/polymeric melamines |
|
NACURE XP-297 |
Acid Phosphate Water Isopropanol |
25 |
90°C |
Aqueous systems using high NH/polymeric melamines. |
|
NACURE 4575 |
Acid Phosphate Methanol Butanol |
25 |
100°C |
High gloss. Superb storage stability with polymeric amino resins. |
|
Nacure Blocked Catalysts
Typical Use Levels
