Abstract: A micro-reaction device for preparing biodiesel by base catalysis includes a feeding system, a micro-reaction apparatus, and a separation apparatus. The feeding system is in communication with the micro-reaction apparatus, and the micro-reaction apparatus is in communication with the separation apparatus; the micro-reaction apparatus includes a micro-reactor, and the micro-reactor is a micro-dispersion micro-reactor; in the micro-reaction apparatus, an oil phase and short chain alcohols undergo an ester exchange reaction under base catalysis to generate fatty acid esters and by-product glycerol; and the micro-dispersion reactor is provided with a micro-dispersion structure for dispersing the short chain alcohols into micro-droplets.

Abstract: The present invention is directed to a water borne coating composition. The composition according to the present invention comprises an emulsified binder, wherein the binder is a polymer selected from the group consisting of polymers prepared by emulsion polymerization of unsaturated vinyl, acrylate and/or methacrylate monomers, alkyd, polyurethane, and epoxy, 0.3% to 10% by weight of a second polymer selected from one or more of the group consisting of poly(vinyl alcohol) and water-soluble copolymers having repeat units of vinyl alcohol, wherein, if the second polymer is poly(vinyl alcohol), at least 85 wt % of the second polymer has a number of repeat units not less than 2,000, and 0% to 15% by weight of a cellulose-based filler, based on the total weight of the composition, wherein the weight ratio of second polymer to binder is in the range of from 1:100 to 1:1. The composition maybe used in various applications to form a decorative coating which has special visual and tactile effect.