Alkyl-modified siloxane copolymers useful as foam stabilizers in high resilience polyurethane foam
CA 1185254 A · Owner: Union Carbide Corporation · Inventors: Reedy, James D.; Baskent, Feyyaz O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Organosiloxane copolymers having the average formula:, (I) Me3SiO(Me2SiO)n(MeRSiO)pSiMe3 or, (II) R'ME2SiO(Me2SiO)nSiMe2R', wherein R and R' are alkyl groups having five to twenty carbon atoms inclusive, n has a value of 0 to 4 in I and 0 to 8 in II, p has a value of 1 to 2 and the ratio, of n to p is 1 to 3, are useful as foam stabilizers in the manufacture of low density, high resilience polyurethane foam; solutions of such copolymers; a process for producing the polyurethane foam utilizes the copolymers; and polyurethane foams so produced.
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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 April 9, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 9, 2002.
- 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.