C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 1/04 (2006.01) C09D 5/10 (2006.01) C09D 183/02 (2006.01)
Patent
CA 2057405
A low volatile organic content hybrid silica binder, with a total silica content of about 29% to about 42% by weight, suitable for use in the manufacture of zinc-rich primer coating compositions is disclosed. The binder comprises a predominant amount of a silica component derived from the hydrolysis of an organic silicate and a lesser amount of a silica component derived from a silica sol. The solvent component comprises no more than about 75% by weight of an organic solvent having a volatility equal to or greater than the volatility of a C1 to C3 alkyl monohydric alcohol and about 25% by weight or more of a solvent having a lesser volatility than the volatility of a C1 to C3 alkyl monohydric alcohol, with the condition that no more than about 90% by weight of such lesser volatile solvent is a butanol.
Akzo N.v.
Flasch John R.
Gowling Lafleur Henderson Llp
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