| 摘要 |
An aqueous composition, which comprises a reaction product of: i) At least one carboxylic acid containing from 3 to 22 carbon atoms; ii) At least one unsubstituted or substituted aliphatic amine or polyfunctional aromatic amine, containing from 2 to 25 carbon atoms or an amide of the formula R-C(O)-NR1R2, where R, R1 and R2 each independently represent hydrogen or an optionally substituted alkyl group of 1 to 5 carbon atoms; iii) A complex crosslinking agent of a metal which is zinc, aluminium, titanium, copper, chromium, iron, zirconium or lead. iv) A resin or an oil, the weight ratio of the resin or oil to the sum of (i), (ii) and (iii) being at least 2.5:1; and v) A thickener, a continuous dry layer obtained by applying the composition to Western Red Cedar providing a contact angle with water not exceeding 80o. Also described is the use of the composition described above to prepare an aqueous coating composition such that a continuous dry layer obtained by applying the coating composition to Western Red Cedar provides a contact angle with water not exceeding 80o.
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