Preparation method of aqueous dispersion
A water-based dispersion and product technology, applied in coatings, polyether coatings, wax coatings, etc., can solve problems that cannot meet production and application requirements, affect the surface smoothness of polyurethane molded products, etc.
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preparation example Construction
[0127] A preparation method of an aqueous dispersion product, comprising the following raw materials in percentage composition:
[0128] (a) At least one or more hydrocarbon compounds: 0.5-40%;
[0129] (b) Dispersant: 0.001-20%;
[0130] (c) Auxiliary agent: 0.0001~30%;
[0131] (d) Water: 10-99.4989%;
[0132] The production method of this aqueous dispersion product comprises the steps:
[0133] S1, put (a) hydrocarbon compound, (b) dispersant, (c) auxiliary agent into the reaction vessel, heat and stir to mix;
[0134] S2. Heat (d) water to 80-100°C, add (a) hydrocarbon compound, (b) dispersant, and (c) auxiliary agent in S1 above, homogeneously disperse each individually or in combination, and then mix;
[0135] S3. The mixture prepared by homogeneously dispersing the above S2 is cooled and filtered to obtain an aqueous dispersion product.
[0136] The heating temperature in S1 is 80-120°C.
[0137] The homogeneous dispersion in S2 specifically adopts the homogeneous s...
experiment example
[0143] A kind of aqueous dispersion product of the present invention and its preparation method and application are described in further detail below by specific examples:
[0144] Experimental Materials
[0145] High-resilience soft foam polyurethane material combination A white material, B black material, A:B is 10:6 (Tianyu Tianyu Polyurethane Co., Ltd.), mold temperature 40-85 ℃, manual foaming. Take 10 parts of material A and 6 parts of material B, stir and mix for 5 seconds, pour into the mold, and take the mold after 6 minutes.
[0146] The size of the mold is 10×10×3cm.
[0147] Evaluation method
[0148] The method for evaluating the surface porosity of polyurethane is as follows: observe the porosity on the surface of the molded product of 10×10 cm, record the surface area of the porosity and the surface area of the non-porosity, and use the ratio of the surface area of the porosity (Sk) to the total surface area of 100 to record it as open hole percentage...
experiment example 1
[0153] Table 1 Release, release, and anti-adhesive test formula of polyurethane molded products
[0154]
[0155]
[0156] Table 2 Sources of Raw Materials
[0157]
[0158]
[0159] According to the formula ratio in Table 1 and Table 4, the processing is carried out. The processing process is as follows: put all the raw materials into the pressure reactor according to the proportion, raise the temperature to about 120°C, control the pressure to about 2 atmospheres, stir and mix, react for 30 minutes, cool down and filter That is, the aqueous dispersion product is obtained. The dispersion method under normal pressure is to heat hydrocarbon chemicals, dispersants, additives, to a temperature of 5-40°C above the melting point, to heat water to a temperature equivalent to the temperature, and then add water to the oil phase, cool down and filter after homogeneous dispersion. get the product.
[0160] Spray the water-based dispersion product on the mold by spraying, ...
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