Patent ID: 6451382
Filing Date: 2002-09-17
Classification: C09D,C23C,Y10T

Abstract:
A method for improving efficiency of heat transfer from a heat transfer medium flowing in heat transfer contact with a heat transfer surface of a thermally conductive component of a heat transfer system across said heat transfer surface, said method comprising coating at least a portion of said heat transfer with a curable, reactive, film-forming, coating composition having a low viscosity capable of penetrating into micron and submicron size voids in said heat transfer surface, and curing the composition to thereby form an at least substantially continuous glassy coating on said heat transfer surface, said coating extending into voids and defects which may be present in said heat transfer surface, whereby a fungi-proof, hydrophobic and thermally conductive corrosion protective layer is provided on said heat transfer surface wherein said coating composition comprises an aqueous or non-aqueous oligomeric low molecular weight silane coating composition formed by admixing (a) at least one silane of the formula (1)R1nSi(OR2)4âˆ’nâ€ƒâ€ƒ(1) where R1 represents a C1-C6 alkyl group, a C6-C8 aryl group or a functional group including at least one of vinyl, acrylic, amino, mercapto, or vinyl chloride functional groups, R2 represents a C1-C6 alkyl or acetyl group and n is a number of 1 or 2;(b) silane condensation catalyst, and (c) C2-C4 alkanol solvent, and; (d) (ii) colloidal aluminum hydroxide, (iii) metal alcoholate of formula (2): M(OR3)mâ€ƒâ€ƒ(2) where M is a metal valence 2, 3 or 4, or mixture of two or more such metals;R3 represents a C1-C6 alkyl group, m represents a number or 2, 3 or 4, or mixture of (ii) and (iii); and (e) water; and curing the applied coating composition.