Polyester compositions with improved properties
CA 1340666 C · Owner: Rex, Gary Charles · Inventors: Reid, Carroll Glenn; Rex, Gary Charles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Resin compositions suitable for molding are disclosed which comprise (a) a polyester resin comprising the reaction product of an olefinically unsaturated dicarboxylic acid or anhydride with a polyol in which no more than 30 molar percent of the unsaturated acid or anhydride can be replaced with a non-crosslinkable acid: (b) an ethylenically unsaturated monomer: (c) a polymeric low profile additive and (d) a multifunctional material with an r1 value relative to styrene of at least one double bond of equal to or less than 1 comprising a molecule with two or more acrylic acid ester or methacrylic acid ester groups or two or more vinyl groups. The compositions may additionally comprise (e) an …
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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 July 20, 1999. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 20, 2016.
- 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.