A kind of preparation method of neoprene latex for engineering waterproofing
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A neoprene latex and engineering technology, which is applied in the field of preparation of neoprene latex for engineering waterproofing, can solve the problems of poor adsorption and inapplicability of anionic latex, and achieve high stability and good waterproof effect
Active Publication Date: 2022-05-20
重庆化医长寿化工集团有限公司
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Problems solved by technology
Materials used in engineering, such as cement, glass and materials with high-priced metal ions, have the same negative charge on the surface as the surface charge of anionic latex particles, so the adsorption is poor.
Therefore, anionic latex is not suitable for engineering waterproof materials
Method used
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Embodiment 1
[0039] Taking preparation example 1 as example, the preparation method of neoprene latex is described in detail, a kind of preparation method of engineering waterproof neoprene latex, comprises the following steps:
[0041] Add the weighed aluminum chloride (i.e. aluminum trichloride) into the preparation barrel, slowly add soft water (without calcium, magnesium and other ions) under continuous stirring, so that the aluminum chloride is completely dissolved, cool to normal temperature, and set aside.
[0042] Step 2 Prepare the water phase:
[0043] After the soft water has been measured in the water phase preparation tank, the weighed sodium hydroxide, salts and dodecyltrimethylammonium chloride are added successively under stirring to obtain the water phase, and the prepared aluminum chloride solution Pour it into the water phase liquid, and at the same time use the pump to circulate, so that the substances added to the w...
Embodiment 1～4 and comparative example 1
[0066] Carry out experimental detection to above-mentioned embodiment 1~4 and comparative example 1~3:
[0067] 1. Stability testing
[0068] According to the measurement standard SH / T 1151-1992 (confirmed in 1998) for the high-speed mechanical stability of synthetic latex, the amount of gel produced under high-speed stirring is detected to examine the stability of chloroprene latex. The test results are shown in Table 2 below:
[0069] Table 2 is the stability of embodiment 1~4 and comparative example 1~3 chloroprene latex
[0070] Numbering Example 1 Example 2 Example 3 Example 4 Comparative example 1 Comparative example 2 Comparative example 3 Gel amount none none none none trace a small amount a small amount
[0071] In conjunction with Table 2, it can be seen that the neoprene latex obtained in Examples 1 to 4 does not have gel during the experiment, that is, the stability is good, and the adhesive will not be affected by th...
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Abstract
The invention relates to the technical field of neoprene latex, and specifically discloses a preparation method of neoprene latex for engineering waterproofing, comprising the following steps: weighing aluminum chloride powder, adding water and stirring until dissolved; adding water into the water phase preparation tank, and Under the action of stirring, add sodium hydroxide, salts and emulsifier in order to obtain the water phase, mix the aluminum chloride solution with the water phase; send the chloroprene into the oil phase preparation tank, add the regulator, and stir to dissolve the regulator Add water, emulsifier and sodium carbonate in the preparation tank, stir and dissolve to obtain liquid A, add soft water in the preparation tank, add anti-aging agent and phenothiazine, stir and dissolve to obtain liquid B, mix and emulsify liquid A and liquid B for 30 ~45min to get the terminator; first add the oil phase to the polymerization kettle, then add the water phase, stir and emulsify, add the initiator to start the polymerization, when the total solids are qualified, put it into the termination kettle for deep rotation, then add the terminator, and stir for 30~ The finished latex was prepared in 35 minutes; cationic neoprene latex with high stability and good waterproof performance could be prepared by adopting the preparation method of the present invention.
Description
technical field [0001] The invention relates to the technical field of neoprene latex, in particular to a preparation method of neoprene latex for engineering waterproofing. Background technique [0002] Neoprene latex is made by polymerizing chloroprene in emulsion. Due to the different emulsifiers, initiators, regulators, terminators, auxiliary monomers and polymerization conditions used in neoprene latex, many varieties with different characteristics and uses can be produced to meet the needs of different products. Neoprene latex can be roughly divided into two categories: negative latex and positive latex. Domestic neoprene latex includes general-purpose neoprene latex suitable for manufacturing industrial gloves and other dipped products, concentrated neoprene latex suitable for manufacturing sponge products, and cold-resistant neoprene latex that can be used to manufacture weather balloons and products requiring low temperature characteristics. These latexes are nega...
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