Back to results
US 10,744,425 B2Granted
Defoaming compositions for detergents
AssigneeWacker Chemie AG
InventorsChristof Brehm, Richard Becker, Holger Rautschek
Life of this patent
Estimating the term…
Abstract
Effective defoamer compositions contain two different aryl-substituted organopolysiloxanes and filler particles, and show high defoaming capability.
Claims18
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 are identical or different and are a hydrogen atom or a monovalent, SiC-bonded, optionally substituted hydrocarbyl radical which is aliphatic or which is aromatic and is bonded via an aliphatic carbon atom to silicon,
- R1 are identical or different and are hydrogen or a monovalent, optionally substituted hydrocarbyl radical,
- R2 are identical or different and are monovalent, optionally substituted, aromatic hydrocarbyl radicals bonded via a ring carbon atom to silicon,
- a is 0, 1, 2 or 3,
- b is 0, 1, 2 or 3, and
- c is 0 or 1,
- with the proviso that
- the sum a+b+c is less than or equal to 3,
- in at most 70% of all units of the formula (I), the sum a+c is 2,
- in at least 30% of all units of the formula (I), the sum a+c is 1, and
- in more than 20% of all units, c is 1,
- (A2) organosilicon compounds comprising units of the formula
- Ra′(R1O)b′R2c′SiO(4-a′-b′-c′)/2 (II),
- in which
- R, R1 and R2 have the definition stated for them above,
- 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 a′+b′+c′ is less than or equal to 3,
- in more than 90% of all units of the formula (II) the sum a′+c′ is 2,
- in at most 5% of all units of the formula (II) the sum a′+c′ is 1, and
- in 10-85% of all units of the formula (II) c′ is other than 0,
- (B1) filler particles and/or
- (B2) organopolysiloxane resins containing units of the formula
- R3d(R4O)eSiO(4-d-e)/2 (III),
- in which
- R3 are identical or different and are hydrogen or a monovalent, optionally substituted, SiC-bonded hydrocarbyl radical,
- R4 are identical or different and are 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 d+e is less than or equal to 3 and in less than 50% of all units of the formula (III) in the organopolysiloxane resin, the sum d+e is 2,
- and optionally
- (B3) organosilicon compounds which are different from (A1) and (A2) and comprise units of the formula
- R5g(R6O)hSiO(4-g-h)/2 (IV),
- in which
- R5 are identical or different and have a definition stated for R,
- R6 are identical or different and have a definition stated for R′,
- g is 0, 1, 2 or 3, and
- h is 0, 1, 2 or 3,
- with the proviso that the sum g+h is less than or equal to 3 and in at least 50% of all units of the formula (IV) in the organosilicon compound, the sum g+h is 2,
- (C) optionally, polyether-modified siloxanes,
- (D) optionally, organic compounds,
- (E) optionally, water, and
- (F) optionally, further additives.
45 more elements
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 are identical or different and are a hydrogen atom or a monovalent, SiC-bonded, optionally substituted hydrocarbyl radical which is aliphatic or which is aromatic and is bonded via an aliphatic carbon atom to silicon,
- R1 are identical or different and are hydrogen or a monovalent, optionally substituted hydrocarbyl radical,
- R2 are identical or different and are monovalent, optionally substituted, aromatic hydrocarbyl radicals bonded via a ring carbon atom to silicon,
- a is 0, 1, 2 or 3,
- b is 0, 1, 2 or 3, and
- c is 0 or 1,
- with the proviso that
- the sum a+b+c is less than or equal to 3,
- in at most 80% of all units of the formula (I), the sum a+c is 2,
- in at least 20% of all units of the formula (I), the sum a+c is 1, and
- in more than 10% of all units, c is 1,
- (A2) organosilicon compounds comprising units of the formula
- Ra′(R1O)b′R2c′SiO(4-a′-b′-c)/2 (II),
- in which
- R, R1 and R2 have the definition stated for them above,
- 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 a′+b′+c′ is less than or equal to 3,
- in more than 80% of all units of the formula (II) the sum a′+c′ is 2,
- in at most 10% of all units of the formula (II) the sum a′+c′ is 1, and
- in 1-100% of all units of the formula (II) c′ is other than 0,
- (B1) filler particles and/or
- (B2) organopolysiloxane resins containing units of the formula
- R3d(R4O)eSiO(4-d-e)/2 (III),
- in which
- R3 are identical or different and are hydrogen or a monovalent, optionally substituted, SiC-bonded hydrocarbyl radical,
- R4 are identical or different and are 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 d+e is less than or equal to 3 and in less than 50% of all units of the formula (III) in the organopolysiloxane resin, the sum d+e is 2,
- and optionally
- (B3) organosilicon compounds which are different from (A1) and (A2) and comprise units of the formula
- R5g(R6O)hSiO(4-g-h)/2 (IV),
- in which
- R5 are identical or different and have a definition stated for R,
- R6 are identical or different and have a definition stated for R1,
- g is 0, 1, 2 or 3, and
- h is 0, 1, 2 or 3,
- with the proviso that the sum g+h is less than or equal to 3 and in at least 50% of all units of the formula (IV) in the organosilicon compound, the sum g+h is 2,
- (C) optionally, polyether-modified siloxanes,
- (D) optionally, organic compounds,
- (E) optionally, water, and
- (F) optionally, further additives
- wherein organosilicon compounds (A1) are silicone resins of one or more of the formulae
- (R2SiO3/2)k(R2SiO)1,
- (R2SiO3/2)K(R2SiO)l(R2(R1O)SiO2/2)m,
- (R2SiO3/2)k(R2SiO)l(R2(R1O)SiO2/2)m(R2(R1O)2SiO1/2)n or
- (R2SiO3/2)k(R2(R1O)SiO2/2)m,
- which silicone resins optionally further comprise units of the formulae R3SiO1/2 and R2(R1O)SiO1/2, and mixtures thereof, and
- the coefficients k, l, m and n independently of one another have values greater than or equal to 1.
52 more elements
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 are identical or different and are a hydrogen atom or a monovalent, SiC-bonded, optionally substituted hydrocarbyl radical which is aliphatic or which is aromatic and is bonded via an aliphatic carbon atom to silicon,
- R1 are identical or different and are hydrogen or a monovalent, optionally substituted hydrocarbyl radical,
- R2 are identical or different and are monovalent, optionally substituted, aromatic hydrocarbyl radicals bonded via a ring carbon atom to silicon,
- a is 0, 1, 2 or 3,
- b is 0, 1, 2 or 3, and
- c is 0 or 1,
- with the proviso that
- the sum a+b+c is less than or equal to 3,
- in at most 80% of all units of the formula (I), the sum a+c is 2,
- in at least 20% of all units of the formula (I), the sum a+c is 1, and
- in more than 10% of all units, c is 1,
- (A2) organosilicon compounds comprising units of the formula
- Ra′(R1O)b′R2c′SiO(4-a′-b′-c′)/2 (II),
- in which
- R, R1 and R2 have the definition stated for them above,
- 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 a′+b′+c′ is less than or equal to 3,
- in more than 80% of all units of the formula (II) the sum a′+c′ is 2,
- in at most 10% of all units of the formula (II) the sum a′+c′ is 1, and
- in 1-100% of all units of the formula (II) c′ is other than 0,
- (B1) filler particles and/or
- (B2) organopolysiloxane resins containing units of the formula
- R3d(R4O)eSiO(4-d-e)/2 (III),
- in which
- R3 are identical or different and are hydrogen or a monovalent, optionally substituted, SiC-bonded hydrocarbyl radical,
- R4 are identical or different and are 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 d+e is less than or equal to 3 and in less than 50% of all units of the formula (III) in the organopolysiloxane resin, the sum d+e is 2,
- and optionally
- (B3) organosilicon compounds which are different from (A1) and (A2) and comprise units of the formula
- R5g(R6O)hSiO(4-g-h)/2 (IV),
- in which
- R5 are identical or different and have a definition stated for R,
- R6 are identical or different and have a definition stated for R′,
- g is 0, 1, 2 or 3, and
- h is 0, 1, 2 or 3,
- with the proviso that the sum g+h is less than or equal to 3 and in at least 50% of all units of the formula (IV) in the organosilicon compound, the sum g+h is 2,
- (C) optionally, polyether-modified siloxanes,
- (D) optionally, organic compounds,
- (E) optionally, water, and
- (F) optionally, further additives,
- wherein organosilicon compounds (A2) are organopolysiloxanes of the formula
- R3-p(R1O)pSiO[R2SiO]v[R*R2SiO]w(R1O)pR3-p (V),
- which organopolysiloxanes optionally further comprise T units of the formulae R2SiO3/2, RSiO3/2, R2(R1O)SiO2/2, R(R1O)SiO2/2, R2(R1O)2SiO1/2, R(R1O)2SiO1/2 and mixtures thereof in amounts of 0 to 5 mol %,
- R* is R or R2,
- p is 0 or 1,
- v is 0 or an integer, and
- w is a positive integer.
52 more elements
Dependencies are inferred from the claim text.