A kind of butadiene-styrene copolymer latex and its preparation method and application
A technology of styrene copolymer and copolymer latex, which is applied in textiles and papermaking, non-fibrous pulp addition, papermaking, etc., can solve the requirements of difficult water resistance printing strength and ink acceptance, surface strength, printing gloss and foaming resistance Unable to meet the high-speed coating of paper machines, etc., to meet the requirements of water-resistant printing strength, ink acceptance and foaming resistance, strong product stability, and strong controllability
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[0024] The invention discloses a butadiene-styrene copolymer latex, a preparation method and application thereof. The copolymer latex is composed of soft and hard two-phase copolymers and water, and at least one phase is formed by emulsion polymerization of butadiene, styrene, functional monomers and unsaturated carboxylic acid monomers. Wherein, the composition of the soft phase copolymer includes:
[0025] Butadiene monomer: 36-42%;
[0026] Styrene monomer: 56-62%;
[0027] Unsaturated carboxylic acid: 2-4%;
[0028] The composition of the hard phase copolymer latex includes:
[0029] Butadiene monomer: 30-36%;
[0030] Styrene monomer: 56-65%;
[0031] Unsaturated carboxylic acid: 3-6%;
[0032] Functional monomer: 2.0-6.0%.
[0033] The weight of the monomer mixture of the soft phase copolymer accounts for 20wt% to 50wt% of the total weight of the monomer mixture; the weight of the monomer mixture of the hard phase copolymer accounts for 50wt% to 80wt% of the total...
Embodiment 1
[0058] In a 10-liter stainless steel autoclave, add 45.76wt% of the total weight of deionized water, 0.75wt% of seed latex, 0.22wt% of sodium dodecylbenzenesulfonate, and 0.02wt% of EDTA, stirring and dissolving and heated to 80°C. Then continuously add dropwise the butadiene monomer, the styrene monomer of 10.3wt%, the acrylic acid of 0.4wt%, the sodium dodecylbenzenesulfonate of 0.4wt%, the superacid of 0.24wt% that account for total weight 7.7wt%. Ammonium sulfate and 0.13 tert-dodecylmercaptan were polymerized for 1.5 hours. In the reaction kettle, add continuously dropwise the butadiene monomer accounting for 10.5wt% of the total weight, the styrene monomer of 19wt%, the acrylic acid and itaconic acid mixture of 1.6wt%, the acrylic acid of 1.5wt%, the acrylic acid of 0.75wt% A monomer mixture composed of sodium dodecylbenzenesulfonate and 0.24wt% tertiary-dodecyl mercaptan was added continuously for 2.5 hours; while the initiator solution of 0.49wt% ammonium persulfate w...
Embodiment 2～10
[0061] Embodiment 2~10 reaction process is with embodiment 1, and its each composition and reaction parameter change are shown in Table 1;
[0062] The properties of the obtained butadiene-styrene copolymer latex are shown in Table 2.
[0063] Each embodiment reaction parameter of table 1
[0064]
[0065] Table 2 each implements latex physical index
[0066]
[0067] The butadiene-styrene copolymer latex product prepared in Examples 1-10 is used in the coating experiment of paper, the coating proportion is shown in Table 3, and the paper printing performance after coating is shown in Table 4.
[0068] Table 3 Coating composition ratio
[0069]
[0070] Table 4 Paper Printing Properties after Coating
[0071]
[0072] According to the paper coating experiment, the butadiene-styrene copolymer latex product has strong stability and good compatibility with coatings. The coated paper has high dry and wet nap strength, good adhesion, whiteness, Gloss and smoothness,...
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