| abstract |
The invention discloses a method for preparing a coating solution for metal fittings of luggage, comprising the following steps: (1) preparing chitosan microspheres; (2) preparing an aqueous solution of sodium alginate; (3) and step (1) ) prepared chitosan microspheres are added to the sodium alginate aqueous solution prepared in step (2), the glutaraldehyde solution is cross-linked, and freeze-dried to obtain chitosan-sodium alginate composite microspheres; (4) preparation of composite fillers (5) preparation of coating primer: by weight, 10-20 parts of chitosan-sodium alginate microspheres prepared in step (3), 20-25 parts of water-soluble alkyd resin, 4-5 parts of parts of chlorinated polypropylene, 10-20 parts of sodium methylene dinaphthalene sulfonate, 2-5 parts of polyethylene wax, 10-20 parts of composite filler, 0.5-3 parts of drier, 0.5-2 parts of anti-skinning agent , and diluent are mixed to obtain the coating liquid. The coating liquid prepared by the invention can make the metal fittings not fade for a long time under the condition of illumination. |