Process for the production of speck-free rubber latices having high surface tension
CA 1137672 A · Owner: Bayer Aktiengesellschaft · Inventors: Heins, Ferdinand
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the production of substantially speck-free carboxylated rubber latices of high surface tension by polymerising a monomer mixture of .alpha..beta.-monoethylenically unsaturated mono- or di-carboxylic acids and a mixture of acyclic conjugated dienes and aryl vinyl monomers and/or (meth)acrylonitrile in the, aqueous phase in the presence of water-soluble emulsifiers, peroxodisulphate as initiator and mercaptocarboxylic acid corresponding to the formula:, HS-(CH2)X-CO2H in which, x is an integer of from 1 to 5 and/or water-soluble salts thereof. Le A 18 848
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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 December 14, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 14, 1999.
- 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.