Fluorinated oligourethanes

Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Compound of indeterminate structure – prepared by reacting an...

Reexamination Certificate

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C508S464000, C528S044000, C528S059000, C528S065000, C528S367000, C521S155000

Reexamination Certificate

active

09592254

ABSTRACT:
Fluorinated oligourethanes, having number average molecular weight lower than or equal to 9,000, having a branched structure, formed of the following monomers and macromers:a) aliphatic, cycloaliphatic or aromatic polyisocyanates,b) heterofunctional hydrogenated monomers having general formula:in-line-formulae description="In-line Formulae" end="lead"?X0—(CR1AR2A)b—Y0  (Ib)in-line-formulae description="In-line Formulae" end="tail"?one or more of the following compounds:c) bifunctional hydroxyl (per)fluoropolyethers (PFPE diols) having number average molecular weight in the range 400-3,000,e) monofunctional hydroxyl (per)fluoropolyethers or monofunctional hydroxyl (per)fluoroalkanes (e′), having number average molecular weight in the range 300-1,000,and optionally the following compounds:d) heterofunctional monomers,dI) hydrogen-active compounds, capable to form bonds with the NCO functions stable at the hydrolysis but weak at heat.

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