| PATENT ASSIGNEE'S COUNTRY | Italy |
| UPDATE | 06.00 |
| PATENT ASSIGNEE | Ausimont SPA |
| PATENT CLAIMS |
- (A) 10-60% of a (A1) (per)fluoropolyethereal prepolymer having NCO functionality obtained by reacting a fifunctional (per)fluoropolyether, having OH functionality & having -CH2OH terminations directly linked to a perfluoroalkylic group CF2 or CF2CFX (X = Cl, F) or CF(CF3), optionally through a bridging linking group (CH2CH2)co wherein co = 0-6, with a polyisocyanate contg isocyanurate rings, obtai ned by cyclotrimerization of HDI, IPDI or other monomeric diisocyanates, by using an excess of NCO groups compri sed 10-80%, the above fluoropolyether prepolymer can be partially or totally replaced by (A2) non fluorinated polyiso cyanates contg isocyanurate rings &/or hydrogenated polyisocyanate prepolymers - (B) 0.1-50% of (per)fluoropolyether having bifunctional OH functionality of the type -CF2CH2OH, -CF2CFXCH2OH (X = Cl, F) or -CF(CF3)CH2OH, or polyfunctional OH functionality termination but contg > 5% of the same type of termination indicated above for the bifunctional in ad-mixt with mono or polyfunctional perfluoropolyethers having an OH termina tion, optionally in ad-mixt with diols &/or hydrogenated polyols having a low MW, or (per)fluoropolyethers prepoly mers as defined in (A) but having a lower pre-polymn degree so as to leave free OH functions of the type -CF2- CH2OH, -CF2CFXCH2OH (X = Cl, F) or -CF2(CF3)CH2OH or the latter prepolymers having free OH functions can be used alone as a single comp, being comp (A) 0% - (C) 10-90% diluting solvent preferably, belonging to the classes: ketone, esters, heteroalcohols, esters, aromatic, & cycloaliphatic & aliphatic hydrocarbons |
| PATENT PHOTOCOPY | Available on request |
|
Want more information ? Interested in the hidden information ? Click here and do your request. |