Preparation method of unsaturated polyester resin low shrinking agent
A technology of polyester resin and low-shrinkage agent, applied in the field of preparation of unsaturated polyester resin low-shrinkage agent
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Embodiment 1
[0030] The polymerization steps are as follows:
[0031] (1) Preparation of seed latex particles:
[0032] Mix 10 parts of liquid nitrile rubber, 1 part of nano-silica and 0 part of coupling agent and add it dropwise to the 110 parts of aqueous solution (the mass ratio of water to the mixture is 1:10), and use high-intensity dispersion for 30 minutes, during which the temperature of the dispersion is kept below room temperature with ice water.
[0033] (2) Preparation of latex particles with core-shell morphology:
[0034] Method (1) Heat the seed latex particles prepared to 70°C, mix 4 parts of styrene and 1.5 parts of acrylonitrile monomer (the monomer is 50% of the mass of the mixture in step 1), and add 0.1% of the mixed monomer persulfuric acid Potassium, the polymerization adopts the method of full dropwise addition, and the dropwise addition time is three hours, and the total polymerization time is 4 hours, and the latex particles prepared are cooled to room temperatu...
Embodiment 2
[0039] The polymerization steps are as follows:
[0040] (1) Preparation of seed latex particles:
[0041] Mix 9.9 parts of polyisoprene rubber, 9.0 parts of nano-silica and 0.3 parts of KH570 into 1 part of sodium dodecylbenzenesulfonate and 0.092 parts of nonylphenol polyoxyethylene ether (OP-10) at one time ( The amount of emulsifier is 1920 parts of aqueous solution (the mass ratio of water and mixture is 1:100) of the mixture (1.0% by weight of the mixture), and it is dispersed by vigorous stirring for 30 minutes, during which the temperature of the dispersion is kept below room temperature with ice water.
[0042] (2) Preparation of latex particles with core-shell morphology:
[0043] The seed latex particles prepared by method (1) were heated to 70°C, and 180 parts of methyl methacrylate, 10 parts of hydroxyethyl acrylate monomer and 2.0 parts of styrene were mixed (the monomer was 1000% of the mass of the mixture in step 1), Add 0.91 parts of ammonium persulfate and ...
Embodiment 3
[0048] The polymerization steps are as follows:
[0049] (1) Preparation of seed latex particles:
[0050] Mix 75 parts of polyurethane rubber (synthesized with polyethylene glycol 2000 and p-toluene isocyanate), 22 parts of nano-titanium dioxide and 3 parts of tetrabutyl titanate slowly to 0.5% mass concentration of nonylphenol polyoxyethylene ether (OP-10 ) and 1000 parts of an aqueous solution of dodecyl ammonium chloride with a mass concentration of 0.5% and stirred, and used high-intensity dispersion for 30 minutes, during which the temperature of the dispersion was kept lower than room temperature with ice water.
[0051] (2) Preparation of latex particles with core-shell morphology:
[0052] Method (1) Heat the seed latex particles prepared to 70°C, mix 25 parts of methyl methacrylate, 0.5 parts of hydroxyethyl acrylate monomer and 24.5 parts of styrene, and add 0.05% ammonium persulfate for each monomer and benzoyl peroxide, the mixed monomers are charged at one time...
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