Phenyl modified polycarboxylic acid slump retaining agent and preparation method thereof
A technology of polycarboxylic acid and slump-retaining agent, applied in the field of phenyl-modified polycarboxylic acid slump-retaining agent and its preparation, can solve the problems of normal setting, concrete segregation and bleeding, slow strength development, etc. Good properties, good adsorption and dispersion ability, and strong fluidity retention ability
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example 1
[0020] Phenyl-modified polycarboxylic acid slump-retaining agent and its preparation method, the total mass of raw materials is 1000 parts, the mass fraction is 40%, and it is mainly prepared from the following components:
[0021] Vinyl butyl ether polyoxyethylene ether: 352 parts; (4-methyl basic) aimine: 8 parts; acrylic acid: 8 parts; hydroxyethyl acrylate: 27 parts; lauryl peroxide: 0.86 parts; Azodiisoheptanonitrile: 1.63 parts; mercaptoethanol: 1.52 parts; the rest is water, with a total mass of 1000 parts and a solid content of 40%.
[0022] Step (1): Preparation of benzene ring block polymers: Add 8 parts of (4-methyl-based) formimine, 12 parts of hydroxyethyl acrylate and 50 parts of deionized water into the reaction kettle ①, at 40°C Next, evenly drop the initiator, that is, a mixed solution of 0.86 parts of lauryl peroxide and 50 parts of deionized water, and the dropping time is 1 h to obtain a benzene ring block polymer;
[0023] Step (2): Preparation of polycar...
example 2
[0025] Phenyl-modified polycarboxylic acid slump-retaining agent and its preparation method, the total mass of raw materials is 1000 parts, the mass fraction is 40%, and it is mainly prepared from the following components: vinyl butyl ether polyoxyethylene ether: 355 parts; Styrene: 7 parts; Acrylic acid: 12 parts; Hydroxypropyl acrylate: 21 parts; Dibenzoyl peroxide: 1.12 parts; The rest is water, the total mass is 1000 parts, and the solid content is 40%.
[0026] Step (1): Preparation of benzene ring block polymer: Add 7 parts of styrene, 8 parts of hydroxypropyl acrylate and 50 parts of deionized water into the reaction kettle ①, and evenly add the initiator dropwise at 50°C. That is, a mixed solution of 1.12 parts of dibenzoyl peroxide and 50 parts of deionized water was added dropwise for 0.5 hours to obtain a benzene ring block polymer;
[0027] Step (2): Preparation of polycarboxylate slump-retaining agent: Add 355 parts of vinyl butyl ether polyoxyethylene ether and ...
example 3
[0029] Phenyl-modified polycarboxylic acid slump-retaining agent and its preparation method, the total mass of raw materials is 1000 parts, the mass fraction is 40%, and it is mainly prepared from the following components: vinyl butyl ether polyoxyethylene ether: 357 parts; 2-aminostyrene: 6 parts; acrylic acid: 10 parts; hydroxyethyl acrylate: 23 parts; ammonium persulfate: 0.94 parts; dimethyl azobisisobutyrate: 1.57 parts; Water, the total mass is 1000 parts, and the solid content is 40%.
[0030] Step (1): Preparation of benzene ring block polymer: add 6 parts of 2-aminostyrene, 13 parts of hydroxyethyl acrylate and 50 parts of deionized water into the reaction kettle ①, and drop evenly at 45°C Initiator, i.e. a mixed solution of 0.94 parts of ammonium persulfate and 50 parts of deionized water, the dropping time is 0.5h, and the benzene ring block polymer is obtained;
[0031] Step (2): Preparation of polycarboxylate slump-retaining agent: Add 357 parts of vinyl butyl ethe...
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