Aromatic diamine compounds and flame-resistant polyamide compositions containing said compounds
CA 1109488 A · Owner: Kanebo, Ltd. · Inventors: Okamoto, Kazuo; Mizukami, Yoshikatsu; Yamanaka, Keio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel N,N,N',N'-tetraacetyl aromatic diamine compounds shown by the general formula (1) (1), wherein R is , , or , (X shows Br or C? Y shows alkylene group or alkylidene, group having 1-3 carbon atoms carbonyl group, sulfonyl, group or oxygen atom and m and n show 0 or an integer of 1-4, is produced by reacting 1 mole of aromatic diamine having the general formula, H2N-R-NH2 (2) with at least 4 moles of acetic anhydride. These compounds are used as a flame retardant for polyamides.
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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 September 22, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 22, 1998.
- 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
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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.