Polyamide-epoxy-silicone modified coating compositions
OwnerPhilip A. Fonkalsrudinventor
Life of this patent
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Abstract
Polyamide--Epoxy--Silicone modified compositions in a water base that are air curable to give tough flexible coatings that may be pigment loaded and maintain the chemical resistance and bonding capabilities of the usual epoxy coatings with hardness and gloss equal to or greater than baked epoxy coatings is disclosed.
Claims6
A water base epoxy coating composition consisting essentially of:
- (a) fifteen to thirty weight percent polyamide;
- (b) an epoxy resin mixed with said polyamide in a weight ratio of polyamide to epoxy of about 0.6 to 1.8;
- (c) a reactive siloxane mixed with said epoxy in a weight ratio of about 0.04 to 0.17 of said reactive siloxane to said epoxy;
- (d) 14 to 24% by weight of a pigment to add color and opacity to said composition;
- (e) 0.4 to 0.8 percent by weight of dispersant and solvent comprising 4 to 8 percent butyl cellusolve by weight 31/2 to 61/2 percent alcohol, and 0.2 to 0.4 percent by weight of TMPD Isobuty rate to facilitate mixing of said polyamide, said epoxy resin, said reactive siloxane and said pigment.
A Water base epoxy coating composition consisting essentially of:
- (a) a weight percent mixture of:
- 18 to 23 percent polyamide
- 18 to 23 percent water
- 6 to 8 percent butyl cellosolve
- approximately 0.4 percent defoamer
- 0.6 to 0.7 percent dispersant
- 18 to 23 percent pigment
- 5 to 6 percent alcohol
- (0.2 to 0.4 percent TMPD isobutyrate
- 22 to 26 percent epoxy resin
- 1.3 to 1.8 percent reactive silicone
- to form an air curable coating that cures at about 77.degree. F. in about 30 hours with a hardness 125 as determined by ASTM Method D4366.
A water base epoxy coating composition consisting essentially of:
- (a) A weight percent mixture of:
- 15 to 30 percent polyamide
- 15 to 30 percent water
- 4 to 8 percent butyl cellosolve
- 2/10 to 4/10 percent defoamer
- 4/10 to 8/10 percent dispersant
- 14 to 24 percent pigment
- 31/2 to 61/2 percent isopropyl alcohol
- approximately 2/10 to 3/10 percent TMPD isobutyrate
- 16 to 29 percent epoxy resin
- 1 to 3 percent of a reactive silicone.
A water base epoxy coating composition comprising a polyamide, an epoxy, a reactive silicone, and a pigment mixture with suitable dispersant and solvents to form air curable coating that cures in about 30 hours at about 77.degree. F. to a Method D4366 and with a gloss varying between about 80 to 95 as determined by ASTM Method D523.
Dependencies are inferred from the claim text.