One-part moisture curable polyurethane adhesive
CA 2416908 A1 · Owner: Dow Global Technologies Inc. · Inventors: Zhou, Lirong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is a polyurethane prepolymer comprising the reaction product of: A) a polyisocyanate; B) one or more compounds or polymers having isocyanate-reactive moieties. C) a dispersion triol containing from 10 to 60 percent by weight based on the dispersion of particles of an organic polymer which is nonreactive with the polyols and polyisocyanates having a particle size of from 5 to 50 microns; wherein the prepolymer has a free isocyanate content of from 0.8 to 2.2 percent, the weight ratio of diol to triol and dispersion triol is from 0.8 to 1.2. In another embodiment the invention is a one-part adhesive composition comprising the polyurethane prepolymer of the …
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
- Filed August 7, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 7, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 2023.
- 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.