A kind of strong ultraviolet absorption polyacrylate redispersible latex powder and its preparation method
A technology of redispersing latex powder and polyacrylate emulsion, which is applied in the direction of coating, etc., can solve the problems of poor performance of redispersible latex powder such as weather resistance and UV resistance, and cannot meet the practical application, so as to achieve superior water resistance, The effect of good film-forming performance
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[0042] The present invention also provides a preparation method of strong ultraviolet absorbing polyacrylate redispersible latex powder, comprising:
[0043] 1) With 0.5-5 parts by weight of lignin monomer, 15-35 parts by weight of alkyl methacrylate monomer, 15-35 parts by weight of alkyl acrylate monomer, 2-8 parts by weight of functional monomer, 0.2- 0.6 parts by weight of initiator, 0.5-1.5 parts by weight of emulsifier, and 40-70 parts by weight of deionized water are used as raw materials to carry out radical emulsion copolymerization to prepare lignin-modified polyacrylate emulsion;
[0044] 2) Mix 70-80 parts by weight of the lignin-modified polyacrylate emulsion prepared in step 1), 2-10 parts by weight of the pH regulator and 3-10 parts by weight of the functional auxiliary agent, spray dry it into powder, and add anti-caking 5-10 weight blocks to obtain redispersible latex powder of polyacrylate with strong ultraviolet absorption.
[0045] According to the present...
Embodiment 1
[0050] a. Synthesis of lignin monomer: disperse 0.5 g of hydroxy lignin in 95 g of methanol and perform ultrasonic treatment, gradually add 0.05 g of vinyltrimethoxysilane, and react with stirring at 60° C. for 6 h. After the reaction was completed, the product was filtered and washed with methanol, and then vacuum-dried at 60° C. for 12 hours to obtain a lignin monomer.
[0051] Synthesis of Lignin Modified Polyacrylate Emulsion:
[0052] Described lignin-modified polyacrylate emulsion is made of the following components of quality:
[0053]
[0054] Weigh the monomers in the above recipe.
[0055] b. Preparation of core-shell monomer: Take 6.0g of methyl methacrylate and 18g of butyl acrylate from the above formula, mix them uniformly to make core monomer; mix the remaining monomers evenly to make shell monomer body.
[0056] c. Preparation of seed emulsion: 40g deionized water, 0.15g sodium dodecylbenzenesulfonate, 0.15g polyoxyethylene monolaurate and 0.04g ammonium ...
Embodiment 2
[0062] a. Synthesis of lignin monomer: Disperse 1.0g of methoxylignin in a mixed solvent of 80g of methanol and 10g of deionized water and perform ultrasonic treatment, gradually add 0.1g of vinyltrimethoxysilane, The reaction was stirred for 6h. After the reaction was completed, the product was filtered and washed with methanol, and then vacuum-dried at 60° C. for 12 hours to obtain a lignin monomer.
[0063] Synthesis of Lignin Modified Polyacrylate Emulsion:
[0064] Described lignin-modified polyacrylate emulsion is made of the following components of quality:
[0065]
[0066] Weigh the monomers in the above recipe.
[0067]b. Preparation of core-shell monomer: Take out 6.0g of ethyl methacrylate, 2.0g of methyl acrylate and 14g of butyl acrylate from the above formula, and mix them uniformly to obtain a core monomer; Mix evenly to prepare the shell monomer.
[0068] c. Preparation of seed emulsion: 40g deionized water, 0.20g sodium lauryl sulfate, 0.18g nonylpheno...
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