Antifoam formulations

Details Antifoam formulations Antifoam formulations

2006-09-12

2006-09-12

Gulakowski, Randy (Department: 1712)

Colloid systems and wetting agents; subcombinations thereof; pro

Compositions containing an agent for breaking ; processes of...

Continuous liquid phase colloid system and discontinuous gas...

C524S265000, C525S100000, C528S010000, C556S443000, C556S444000

Reexamination Certificate

active

07105581

ABSTRACT:
An antifoam formulations comprise(A) antifoam agent based on siloxanes and(B) branched polyether/polysiloxane copolymers comprising structural units of the formulain-line-formulae description="In-line Formulae" end="lead"?Y[—CnH2n—(R2SiO)m—Ap—R2Si—G]x  (I)in-line-formulae description="In-line Formulae" end="tail"?in which Y is a multivalent, optionally heteroatom-containing hydrocarbon radical, R are monovalent optionally halogenated hydrocarbon radicals, A is a radical —R2Si—R2—(R2SiO)m—, G is a monovalent radical —CfH2f-2k—Z or a divalent radical —CnH2n— bonded to a radical Y, Zin-line-formulae description="In-line Formulae" end="lead"?—(R6)v—(OCH2CH2)a[OCH2CH(CH3)]b[OCH2CH(CH2CH3)]c—OR3,in-line-formulae description="In-line Formulae" end="tail"?in which R3is hydrogen, a hydrocarbon radical, or a radical R—C(O)—, R6is a divalent hydrocarbon radical, v is 0 or 1, a, b and c are 0 or an integer between 1 and 1000, the sum (a+b+c) being from 2 to 2000, x is 3 to 10, f is 2 to 12, k is 0 or 1, n is 2 to 12, m is at least 1, and p is 0 or a positive integer, the branched polyether/polysiloxane copolymers (B) containing on average at least one group Z.

REFERENCES:
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patent: 6187891 (2001-02-01), Rautschek et al.
patent: 6605183 (2003-08-01), Rautschek et al.
patent: 2003/0013808 (2003-01-01), Tonge et al.
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patent: 1 076 073 (2001-02-01), None
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English Derwent Abstract AN 2001-124111 corresponding German Patent DE 199 18 361.
English Derwent Abstract AN 1981-09925D [7] corresp. to DE 29 25 722.
English Derwent Abstract AN-2001-259426 [27] corresp. to EP 1 076 073.
English Derwent Abstract corresp. to DE 56 762.

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