Powder coating compositions
CA 1260190 A · Owner: Ciba Specialty Chemicals Holding Inc. · Inventors: Moss, Noel S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Powder coating compositions suitable for use in the manufacture of laser-engraved printing rollers comprise, (a) a difunctional epoxy resin prepared From a bisphenol (b) an epoxy resin having an epoxide functionality greater than 2, (c) a diaminodiphenylsulphone as hardener for the mixture of resins (a) and (b), and, (d) an imidazole as curing accelerator. These compositions when applied to a metal base, member, fused and cured, provide a surface that is easily engravable yet has excellent resistance to chemical attack and physical wear. Typical difunctional epoxy resins (a) are 2,2-bis(4glycidyloxyphenyl)propane advanced with bisphenol A while, typical epoxy resins that may be used as (b) …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.