Preparation method of hyperbranched polycarboxylic acid containing copolymer cement dispersant

US9175122B2 · kind B2 · utility

Assignee

• SOBUTE NEW MATERIALS CO., LTD. · CN

Inventors

• Changwen Miao · Nanjing, CN
• Min Qiao · Baofeng County, CN
• Qianping Ran · 安丰镇, CN
• Jianping Liu · Longbeilingcun, CN
• Dongliang Zhou · Nanjing, CN
• Yong Yang · 红钢城街道, CN
• Yonglin Mao · Nanjing, CN

Key dates

• Filing date: Dec 22, 2010
• Grant date: Nov 3, 2015
• Expiry date: Jan 3, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2103/408
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The present invention provides a preparation method of hyperbranched polycarboxylic acid type copolymer cement dispersant, including: Monomer A, B and C undergo a free radical copolymerization in an aqueous medium. The molar ratio of Monomer A, Monomer B and Monomer C conforms to B/A−A−2−10 and C/(A+B−C)−0.02−0.08. Monomer A is expressed by General Formula (1), where, R1 is H or a methyl; X1═O, CH2O, CH2CH2O; m is an integer from 5 to 200.Monomer B is expressed by General Formula (2), where, R2 is H or COOM; R3 is H or CH3 and M is H, Na, K or NH4;Monomer C is expressed by General Formula (3), where, R4 is H or methyl; X2═O, CH2O, CH2CH2O; Y═CH2, CH2CH2, CH(CH3), CH2CH2CH2, CH(CH3)CH2, C(CH3)2 and n is an integer from 5 to 200.