Method for preparing carboxylic styrene butadiene latex for carpet back coating
A carboxylated styrene-butadiene latex, back-coating technology, used in adhesive types, textiles and paper, fiber processing, etc.
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Embodiment 1
[0019] 47 parts of main monomer butadiene, 48 parts of styrene; 3.5 parts of functional monomer, including 2 parts of acrylic acid, 1.5 parts of itaconic acid; 1.5 parts of auxiliary monomer, using methacrylonitrile; 2.4 parts of emulsifier, of which anion The emulsifier is 1.2 parts of sodium alkyl sulfate, 0.6 parts of sodium alkylbenzene sulfonate, 0.6 parts of non-ionic emulsifier fatty alcohol polyoxyethylene ether; 1.5 parts of initiator, using thermal decomposition type potassium persulfate; Dithiol 1 part.
[0020] Under vacuum conditions, put 75 parts of deionized water into the reactor, all electrolytes, chelating agent, pH buffering agent, emulsifier solution (wherein 0.4 part of alkyl sodium sulfate, 0.2 part of alkylbenzene sodium sulfonate, fatty alcohol 0.2 parts of polyoxyethylene ether, 8 parts of deionized water), 0.4 parts of molecular weight regulator n-dodecanethiol, 12 parts of styrene, 2 parts of functional monomers (including 1 part of acrylic acid and ...
Embodiment 2
[0023] 30 parts of main monomer butadiene, 64 parts of styrene; 6 parts of functional monomer, including 3 parts of acrylic acid, 1 part of methacrylic acid, and 2 parts of itaconic acid; 0.6 parts of emulsifier, of which the anionic emulsifier is alkyl sulfuric acid 0.4 part of sodium, 0.2 part of nonionic emulsifier fatty alcohol polyoxyethylene ether; 0.35 part of initiator, using ammonium persulfate; 0.25 part of molecular weight regulator n-dodecanethiol.
[0024] Under vacuum conditions, put 65 parts of deionized water into the reactor, all electrolytes, chelating agent, pH buffering agent, emulsifier solution (wherein 0.2 part of alkyl sodium sulfate, 0.1 part of fatty alcohol polyoxyethylene ether, deionized 5 parts of water), 0.15 parts of molecular weight modifier n-dodecanethiol, 20 parts of styrene, 4 parts of functional monomers (including 1 part of acrylic acid, 1 part of methacrylic acid, and 2 parts of itaconic acid), stir well, and then use N 2 Permutation tw...
Embodiment 3
[0027]35 parts of main monomer butadiene, 42 parts of styrene; 8 parts of functional monomer, including 4 parts of acrylic acid, 1.5 parts of methacrylic acid, and 2.5 parts of itaconic acid; 15 parts of auxiliary monomer, including 8 parts of methyl methacrylate 6 parts, 6 parts of methyl acrylate, 1 part of β-hydroxyethyl acrylate; 1.8 parts of emulsifier, of which the anionic emulsifier is 0.8 parts of alkyl sodium sulfate, 0.4 parts of sodium alkylbenzene sulfonate, nonionic emulsifier fatty alcohol poly 0.6 parts of oxyethylene ether; 1 part of initiator, using ammonium persulfate; 0.6 parts of n-dodecanethiol as a molecular weight regulator.
[0028] Under vacuum conditions, put 80 parts of deionized water, all electrolytes, chelating agent, pH buffering agent, emulsifier solution (wherein 0.4 part of alkyl sodium sulfate, 0.4 part of alkylbenzene sodium sulfonate, fatty alcohol 0.3 parts of polyoxyethylene ether, 10 parts of deionized water), 0.3 parts of molecular weig...
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