Back to results
US 10,870,732 B2Granted
Defoamer compositions for detergents
AssigneeWacker Chemie AG
InventorsHolger Rautschek, Richard Becker, Christof Brehm
Life of this patent
Estimating the term…
Abstract
Defoamer preparations contain a polyorganosiloxane having aryl groups bonded to silicon at a ring carbon, filler particles and/or silicone resin particles, and a polyoxyalkylene polyether containing oxypropylene moieties. In addition to being efficient and compatible, the defoamer compositions retain their efficiency, especially in liquid detergents, after storage.
Claims18
A defoamer preparation, comprising
- (A) a defoamer composition, comprising
- (a1) at least one organosilicon compound comprising units of the formula
- Ra(R1O)bR2cSiO(4-a-b-c)/2 (I)
- in which
- R is the same or different and is hydrogen or a monovalent, SiC-bonded, optionally substituted, aliphatic hydrocarbyl radical, or aromatic hydrocarbyl radical bonded to silicon via aliphatic groups,
- R1 is the same or different and is hydrogen or a monovalent, optionally substituted hydrocarbyl radical,
- R2 is the same or different and is a monovalent, optionally substituted, aromatic hydrocarbyl radical bonded to silicon via a ring carbon atom,
- a is 0, 1, 2 or 3,
- b is 0, 1, 2 or 3 and
- c is 0, 1, 2 or 3,
- with the proviso that the sum total of a+b+c is not more than 3 and, in 1-100% of all units of the formula (I), c is different than 0 and, in at least 50% of all units of the formula (I), the sum total of a+b+c in the organosilicon compound is 2,
- (a2) at least one additive selected from
- (a21) filler particles and/or
- (a22) organopolysiloxane resin(s) comprising units of the formula
- R3d(R4O)eSiO(4-d-e)/2 (II)
- in which
- R3 is the same or different and is hydrogen or a monovalent, optionally substituted, SiC-bonded hydrocarbyl radical,
- R4 is the same or different and is hydrogen or a monovalent, optionally substituted hydrocarbyl radical,
- d is 0, 1, 2 or 3 and
- e is 0, 1, 2 or 3,
- with the proviso that the sum total of d+e is not more than 3 and, in less than 50% of all units of the formula (II), the sum total of d+e in the organopolysiloxane resin is 2,
- and optionally
- (a3) an organosilicon compound comprising units of the formula
- R5g(R6O)hSiO(4-g-h)/2 (III)
- in which
- R5 is the same or different and has the definition specified for R,
- R6 is the same or different and has the definition specified for R′,
- g is 0, 1, 2 or 3 and
- h is 0, 1, 2 or 3,
- with the proviso that the sum total of g+h is not more than 3 and, in at least 50% of all units of the formula (III), the sum total of g+h in the organosilicon compound is 2,
- (B) polypropylene glycols, terminally etherified or esterified polypropylene glycols, polypropylene glycol/polyethylene glycol copolymers, terminally etherified or esterified polypropylene glycol/polyethylene glycol copolymers, and mixtures thereof,
- (C) optionally, polyether-modified siloxanes,
- (D) optionally, organic compounds, and
- (F) optionally, further additives.
31 more elements
Dependencies are inferred from the claim text.