Thermosetting resinous compositions
CA 1099433 A · Owner: Ppg Industries, Inc. · Inventors: Scriven, Roger L.; Chang, Wen-Hsuan; Porter, Samuel, Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel thermosetting resinous compositions are disclosed. The compositions comprise the reaction product of a polymeric polyol having a cured glass transition temperature less than 20°C. with a substantial stoichiometric excess of an aminoplast curative. The cured compositions are hard with good durability and surprising flexibility for such high aminoplast loadings. These compositions are particularly useful as coatings for resilient and rubbery substrates such as foam rubber polyurethane foam, and vinyl foam and on soft metal surfaces such as mild steel and aluminum.
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 April 14, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 14, 1998.
- 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.