Pressure-sensitive adhesives
CA 1134988 A · Owner: Goodrich (B.F.) Company (The) · Inventors: Devry, William E.; Morrissey, Richard T.; Drake, Ralph S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pressure-sensitive adhesive comprises the reaction of product of (A) at least one alkyl acrylate liquid polymer containing both terminal and random hydroxyl functionality and (B) at least one prepolymer, of a polyester glycol or a polyalkylene ether glycol with an excess amount of an aromatic dissocyanate. The adhesive has a full range of desirable adhesive properties, including excellent rolling ball tack 180° peel adhesion, and shear adhesion. The adhesive is useful in both solvent and solvent-free systems.
Read the whole patent
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 November 2, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 2, 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.