Silicon-modified imidyl-phthalic acid derivatives
CA 1111042 A · Owner: Ciba Specialty Chemicals Holding Inc. · Inventors: Darms, Roland; Wyler, Siegfried; Greber, Gerd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The compounds according to the invention are Si-modified imidyl-phthalic acid derivatives of the formula, (I), and the corresponding cyclised imide derivatives; in the formula, A is a radical which completes to a substituted or unsubstituted imidyl group, R is a divalent organic radical, R1 and R2 are each hydrogen or a monovalent organic radical and Q, Q1 and Q2 are each a monovalent organic radical. A typical example is 3-dimethylmaleimidyl-phthalic acid N-(di-n-propoxymethylsilyl)propylimide, which is obtained by reacting 3-dimethylmaleimidyl-phthalic acid N-allylmide and di-n-propoxymethylsilane in solution, followed by cyclisation. The products are used as adhesion promoters for …
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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 October 20, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 20, 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
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.