A kind of preparation method of water-soluble copolymerization sulfur cross-linked latex product
A latex product, water-soluble technology, applied in the field of preparation of water-soluble copolysulfide cross-linked latex products, can solve the problems of complex preparation process, unstable water dispersion, easy sedimentation, etc., and achieve easy-to-obtain raw materials, excellent mechanical properties, The effect of simple process
Active Publication Date: 2022-07-22
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
[0003] Based on this, the present invention provides a method for preparing water-soluble copolysulfide cross-linked latex products to solve the technical problems that the preparation process of latex products in the prior art is relatively complicated, and the water dispersion is unstable and easy to settle
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[0021] 1. Preparation of water-soluble copolymerized sulfur
[0022] In step S101, the sulfur is heated to 130-185 °C to make it melt, and after the color of the sulfur becomes orange yellow, vinyl monomer is added and stirred for 3-12 hours, and then methoxy polyethylene glycol methacrylate or methoxy polyethylene glycol methacrylate is added. The methoxy polyethylene glycol acrylate is stirred and reacted for 6 to 12 hours, wherein the mass percentage of each component is: 40 to 70 percent of sulfur, 15 to 40 percent of vinyl monomer, and 15 to 40 percent of methoxy polyethylene glycol methyl Acrylate or methoxy polyethylene glycol acrylate monomer 15~30%
[0023] Step S102, after the above reaction is completed, the reactant is dissolved in water and filtered to remove unreacted sulfur, and then the water is volatilized to obtain water-soluble copolymerized sulfur;
[0024] In the above step S101, the vinyl monomer is one of p-divinylbenzene, styrene, and N-vinylpyrrolidon...
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A preparation method for a water-soluble copolymerized sulfur cross-linked latex product, comprising: heating sulfur to 130-185 DEG C to make it melt; after the color of the sulfur becomes orange-yellow, adding vinyl monomers to stir and react for 3-12 hours, and then Add methoxy polyethylene glycol methacrylate or methoxy polyethylene glycol acrylate and stir to react for 6 to 12 hours; after the reaction is completed, the reactant is dissolved in water and filtered to remove unreacted sulfur, and then Volatile water to obtain water-soluble copolymerized sulfur; dissolve the water-soluble copolymerized sulfur and catalyst in water, then add rubber latex and mix evenly, pour into the mold, evaporate water at 90~130℃, form a film and complete cross-linking to obtain water-soluble copolymerization Copolymerized sulfur cross-linked latex products. The water-soluble copolymerized sulfur in the present invention is prepared by bulk polymerization, the raw materials are readily available, and the process is simple; and the water-soluble copolymerized sulfur can directly cross-link the rubber latex under the action of a catalyst, without the use of toxic activator zinc oxide and overspeed acceleration It is not only safe and reliable, but also green and environmentally friendly.
Description
technical field [0001] The invention relates to the technical field of latex product production, in particular to a preparation method of a water-soluble copolymerized sulfur cross-linked latex product. Background technique [0002] Latex products are widely used in tubes / sheets, gloves, balloons, condoms and sponge products. In traditional technology, the cross-linking of latex products generally first combines rubber latex with sulfur water dispersion, activator (zinc oxide) water dispersion and superspeed accelerator (zinc dimethyl dithiocarbamate, diethyl disulfide) Zinc substituted carbamate, zinc di-n-butyl dithiocarbamate, etc.) water dispersion is mixed, and then realized by high temperature vulcanization. However, the latex products prepared by this traditional technology mainly have the following disadvantages: since sulfur, activator and accelerator are insoluble in water, they need to be prepared into water dispersions to be uniformly mixed with latex to achieve...
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IPC IPC(8): C08J5/18C08J3/24C08L7/02C08L9/08C08L9/10C08L9/04C08L51/08C08K3/06C08F283/06C08F212/36C08F212/08C08F226/10
CPCC08J5/18C08J3/246C08F283/065C08J2307/02C08J2309/08C08J2309/10C08J2309/04C08J2451/08C08K3/06C08F212/36C08F212/08C08F226/10
Inventor 唐征海段云郭宝春汪冬
Owner SOUTH CHINA UNIV OF TECH