Siloxane cross-linked demulsifiers

Details Siloxane cross-linked demulsifiers Siloxane cross-linked demulsifiers

2011-07-19

2011-07-19

Metzmaier, Daniel S (Department: 1762)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S504000, C528S025000, C516S144000, C210S708000, C208S188000

Reexamination Certificate

active

07981979

ABSTRACT:
A composition comprising one or more siloxane cross-linked demulsifiers wherein said siloxane cross-linked demulsifiers are prepared by reacting one or more alkylphenol-formaldehyde resin alkoxylates, one or more polyalkylene glycols, or a mixture thereof, with up to about 1.0 molar equivalents of one or more silicon-based cross-linkers of formula R1R2R3R4Si wherein R1, R2, R3, R5, R6and R7are independently selected from H, Cl, C1-C4alkyl and C1-C4alkoxy; R4. is selected from H, Cl, C1-C4alkyl, C1-C4alkoxy and a group of formula L1SiR5R6R7; L1is absent or is selected from —O—, arylene and C1-C12alkylene, optionally interrupted by one or more —O— or —N(R8)—; and R8is H or C1-C4alkyl and a method of using the demulsifier composition to resolve water-in-oil emulsions.

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