Polyethylene compositions for rotational moulding processes
CA 1190692 A · Owner: Du Pont Canada Inc. · Inventors: White, George
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition particularly adapted for use in a rotational moulding process is disclosed. The composition comprises polyethylene having a density of 0.920 - 0.970 g/cm3 and a melt index of 10-35 dg/min. 0.3 - 1.3% by weight of a bis(tert. alkyl peroxyalkyl) benzene 0.2 - 1.5% by, weight of a co-curing agent selected from triallyl cyanurate triallyl isocyanurate and 1,2 - polybutadiene 0.01 - 0.05%, by weight of a hindered phenolic antioxidant and 0.01 - 0.02% by weight of a secondary antioxidant. The preferred secondary antioxidant is tris di(tert.-butyl phenyl) phosphite. The composition may be used in for example the moulding of tanks, barrels, containers and the like.
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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 16, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 16, 2002.
- 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.