摘要:
Described is a detergent composition comprising 5 to 80% soda ash, 5 to 24% surfactant and 0.5 to 25% of a zeolite builder, on a detergent composition dry weight basis, wherein up to 100% of the zeolite builder is replaced with an amount of a maleate copolymer effective to function as a builder, the maleate copolymer being characterized by a weight average molecular weight of 500 to 7,0000, a residual total monomer content of less than 1%, on a copolymer weight basis, and comprising at least 50 mole percent of maleate monomer, whereby at least 70 mole percent of the carboxylic acid charge on the maleate monomer is neutralized prior to polymerization, 10 to 50 mole percent of acrylate monomer and 1 to 10 mole percent of a nonionic comonomer; and wherein the detergent composition containing the maleate copolymer inhibits deposition of water hardness salts and the detergent composition comprising the maleate copolymer is characterized by improved detergency relative to the detergent composition without the maleate copolymer.
摘要:
Described is a process for sequestration of water hardness ions, comprising the step of adding to aqueous media containing water hardness ions an effective amount of a maleate copolymer having a weight average molecular weight of 500 to 7,000, a residual total monomer content of less than 1 %, on a maleate copolymer dry weight basis, and comprising at least 50 mole percent of maleate monomer, whereby at least 70 mole percent of the carboxylic acid charge on the maleate monomer is neutralized prior to polymerization, and 10 to 50 mole percent of acrylate monomer.
摘要:
Described is a detergent composition comprising 5 to 80% soda ash, 5 to 24% surfactant and 0.5 to 25% maleate copolymer, the maleate copolymer being characterized by a weight average molecular weight of 500 to 7,000, a residual total monomer content of less than 1%, on a copolymer dry weight basis, and consisting essentially of at least 50 mole percent of maleate monomer, whereby at least 70 mole percent of the carboxylic acid charge on the maleate monomer is neutralized prior to polymerization, 10 to 50 mole percent of acrylate monomer and 1 to 10 mole percent of a nonionic comonomer, wherein the detergent composition comprising the maleate copolymer inhibits deposition of water hardness salts and is characterized by improved detergency, relative to the detergent composition without the maleate copolymer.
摘要:
Maleate copolymers comprise less than 1% residual total free monomer and have a weight average molecular weight of 500 to 7,000. The copolymer comprises at least 50 mole percent maleate, 10 to 50 mole percent acrylate monomer and, preferably, about 1 to 10 mole percent of at least one non-ionic comonomer. The copolymers are useful in inhibiting deposition of water hardness ions, in detergents and as dispersants in aqueous slurries. Copolymers are prepared by an aqueous solution polymerization process, comprising the steps of initially neutralizing at least 70%, on a molar basis, of the charge of a maleate monomer, followed by the slow addition of at least one polymerizable comonomer, together with an oxidative free radical initiator and a suitable metallic ion reductant, for synthesis over at least a three hour period at 80 to 100°C, followed by the addition of more initiator.
摘要:
Described is a process for treating water to inhibit scale formation, comprising adding to the water an effective amount of a maleate copolymer having a weight average molecular weight of 500 to 7,000, a residual total monomer content of less than 1%, on a maleate copolymer dry weight basis, and comprising at least 50 mole percent of maleate monomer, whereby at least 70 mole percent of the carboxylic acid charge on the maleate monomer is neutralized prior to polymerization, and 10 to 50 mole percent of acrylate monomer.
摘要:
Maleate copolymers comprise less than 1% residual total free monomer and have a weight average molecular weight of 500 to 7,000. The copolymer comprises at least 50 mole percent maleate, 10 to 50 mole percent acrylate monomer and, preferably, about 1 to 10 mole percent of at least one non-ionic comonomer. The copolymers are useful in inhibiting deposition of water hardness ions, in detergents and as dispersants in aqueous slurries. Copolymers are prepared by an aqueous solution polymerization process, comprising the steps of initially neutralizing at least 70%, on a molar basis, of the charge of a maleate monomer, followed by the slow addition of at least one polymerizable comonomer, together with an oxidative free radical initiator and a suitable metallic ion reductant, for synthesis over at least a three hour period at 80 to 100°C, followed by the addition of more initiator.