Detail of "27496-82-8"

Reference

Multiple layered coating on heat-sensitive substrates

Multiple layered coating on heat-sensitive substrates. White, Gerald K.; Allen, Karen D.; Nacker, Wayne E. (Rohm and Haas Company, USA). Can. Pat. Appl. CA 2321514 AA 15 Apr 2001, 27 pp. (English). (Canada). CODEN: CPXXEB. CLASS: ICM: B05D001-38. ICS: B05D005-00; B05D003-06. APPLICATION: CA 2000-2321514 2 Oct 2000. PRIORITY: US 1999-419331 15 Oct 1999. DOCUMENT TYPE: Patent CA Section: 42 (Coatings, Inks, and Related Products) Matte pigmented or thick filmed powder coatings for heat sensitive substrates, such as wood, wood composites, plastics, paper and fiber board, can be fully cured, esp. near the substrate, through the incorporation of a dual cure system in the powder comprising a first thermal or/and moisture-protective layer permitting curing and fusing of the second (inner) layer at reduced temp. As an example, after application of the inner layer of a coating powder (optionally contg. a blowing agent), the coating powder may be heated sufficiently to fuse, but not cure the inner layer and exposed to UV-light to effect at least a partial cure followed by an application of the outer layer (which is heated to effect fusing and curing of the outer layer and a full thermal cure of the inner layer). Thus, an epoxy coating powder prepd. my mixing in a melt epoxy resin 85, crosslinker 15, a catalyst 2.0, TiO2 30 and other additives 3. 27496-82-8 and 63411-61-0 which are cas registry numbers of chemicals are mentioned.9 wt. parts (based on 100 wt. parts of a resin) is electrostatically coated on a fiberboard panel and cured 5 min at 300F to obtain an inner layer. The outer layer [consisting of epoxy resin 100, methylene disalicylic acid 18, filler 50 and a catalyst 0.5 wt. parts (based on 100 wt. parts of a resin)] is applied cold and is heated by IR-lamp 10 min at 190° to fuse the coating giving a wrinkled finish without damaging the underlying substrate. .