Preparation method of benzene ring-containing sulfonic block modified polycarboxylic acid slump retaining agent
A benzene ring sulfonic acid-based block and slump-retaining agent technology, which is applied in the field of building materials, can solve the problem of low sensitivity and achieve the effects of good adsorption and dispersibility, easy bending, and strong dispersibility
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example 1
[0024] The preparation method of the block-modified polycarboxylic acid slump-retaining agent containing benzene ring sulfonic acid groups, the total mass of raw materials is 1000 parts, the mass fraction is 40%, and it is mainly prepared from the following components: styrene: 4 parts; styrene Sodium sulfonate: 12 parts; lauryl peroxide: 0.58 parts; acrylic acid: 11 parts; hydroxyethyl acrylate: 27 parts; vinyl butyl ether polyoxyethylene ether and prenyl alcohol in a mass ratio of 1:2 Composition of polyoxyethylene ether: 342 parts; azobisisoheptanonitrile: 1.43 parts; azobisisobutyrocyanoformyl: 0.73 parts; mercaptoethanol: 1.26 parts; the rest is water.
[0025] Step (1): Preparation of benzene ring sulfonic acid block: add 4 parts of styrene, 12 parts of sodium styrene sulfonate and 50 parts of deionized water into No. Initiator a, the dropping time is 2 hours, react to prepare benzene ring sulfonic acid block polymer i; initiator a is a mixed solution of 0.54-0.76 parts ...
example 2
[0029]The preparation method of the block-modified polycarboxylic acid slump-retaining agent containing benzene ring sulfonic acid groups, the total mass of raw materials is 1000 parts, the mass fraction is 40%, and it is mainly prepared from the following components: 1 with a mass ratio of 1:2 - the composition of allyl-2-fluorobenzene and 1-allyl-4-fluorobenzene: 8 parts; the composition of sodium methacrylsulfonate and sodium vinylsulfonate in a mass ratio of 1:1: 6 parts; dibenzoyl peroxide: 0.56 parts; acrylic acid: 13 parts; hydroxypropyl acrylate: 22 parts; vinyl butyl ether polyoxyethylene ether: 346 parts; 1.34 parts; tert-butyl peroxybenzoate: 1.44 parts; mercaptoethanol: 1.66 parts; the rest is water.
[0030] Step (1): Preparation of benzene ring sulfonic acid group block: add 8 parts of 1-allyl-2-fluorobenzene and 1-allyl-4-fluorobenzene with a mass ratio of 1:2 to No. 1 reactor After the composition of benzene, the composition of 6 parts of sodium methacrylate a...
example 3
[0034] The preparation method of the block-modified polycarboxylic acid slump-retaining agent containing benzene ring sulfonic acid groups, the total mass of raw materials is 1000 parts, the mass fraction is 40%, and it is mainly prepared from the following components: 4-methoxy-2- Vinylaniline: 6 parts; a composition of sodium methacrylsulfonate and 2-acrylamide-2-methylpropanesulfonic acid in a mass ratio of 1:1: 14 parts; lauryl peroxide: 0.71 parts; acrylic acid : 10 parts; hydroxyethyl acrylate: 23 parts; the composition of vinyl butyl ether polyoxyethylene ether and isopentenol polyoxyethylene ether with a mass ratio of 1:2: 342 parts; azobisisoheptanonitrile : 1.66 parts; azobisisobutyronitrile: 1.07 parts; mercaptopropanol: 1.56 parts; the rest is water.
[0035] Step (1): Preparation of benzene ring sulfonic acid group block: Add 6 parts of 4-methoxy-2-vinylaniline and 14 parts of sodium methylpropenesulfonate with a mass ratio of 1:1 to No. 1 reactor After stirring ...
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