Low gloss asa resin
CA 2461234 A1 · Owner: Chang, Moh-Ching Oliver · Inventors: Chang, Moh-Ching Oliver; Padwa, Allen R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thermoplastic molding composition comprising a grafted acrylate rubber (ASA) and a gloss reducing agent and a process for making the same are disclosed. The gloss reducing agent is the reaction product of (i) a compound having two or more epoxy groups per molecule and (ii) a compound having two or more amine groups per molecule, with the proviso that the total of epoxy groups of (i) and amine groups of (ii) per molecule is greater than 4. The gloss reducing agent may be either incorporated in ASA as the reaction product of (i) and (ii) or, in the alternative, formed upon the reaction of (i) with (ii) in the course of the thermal processing of the a blend containing ASA (i) and …
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
- Filed September 23, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 23, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 23, 2024.
- 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.