Process for the continuous production in solution of styrene thermoplastic resins
CA 1290872 C · Owner: Lo Consolo, Mauro · Inventors: Borghi, Italo; Matarrese, Savino; Rossi, Anna Grazia
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A Process for the continuous production in solution of styrene thermoplastic resins by polymerization of a vinylaromatic monomer and of a vinyl-nitrile monomer in the presence of an elastomer and of a starter wherein the, polymerixation is conducted in two or more steps. The elastomeric component fed in solution in the solvent and/or in the monomers, to the first step, is subjected to polymerization in this first step and in the subsequent steps at temperatures ranging from 70° to 150°C. In each step, the reaction mass is gently and homogeneously stirred and the reaction product is caused to flow to a thin film evaporator heated at 150°-300°C. This process permits to control the elimination …
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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 October 15, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 15, 2008.
- 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.