Yellowing-resistant elastic styrene-acrylic emulsion and preparation method thereof
A styrene-acrylic elastic emulsion and a yellowing-resistant technology, applied in the field of styrene-acrylic emulsion and its preparation, can solve the problems of influence on decorative performance, limitation of broadness, easy yellowing of exterior wall coatings, etc. Effects of contamination, guaranteed stability and reproducibility
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[0030] In addition, the present invention also provides a preparation method of the anti-yellowing styrene-acrylic elastic emulsion, comprising the following steps:
[0031] a) Preparation of base material liquid A: Add 30-40 parts of deionized water and 0.2-2 parts of emulsifier to a polymerization kettle equipped with a stirrer, condenser, and constant-flow pump feeding device, and heat up until the temperature in the kettle reaches 70-90°C;
[0032] b) Preparation of pre-emulsion B: add styrene, butyl acrylate, acrylonitrile, isooctyl acrylate, formazan in the pre-emulsification tank with monomer metering tank and agitator at normal temperature and pressure Acrylic acid, acrylamide, itaconic acid, antioxidant, and 1.8-8 parts of emulsifier and 40-50 parts of deionized water, stirred and mixed to form a uniform pre-emulsion, and stirred for 10-50 minutes for later use;
[0033] c) Preparation of initiator solution C: add the initiator of formula quantity and 10-30 parts of ...
Embodiment 1
[0040] A kind of anti-yellowing styrene-acrylic elastic emulsion, by weight, comprises the following components: 80 parts of deionized water, 15 parts of styrene, 55 parts of butyl acrylate, 3 parts of acrylonitrile, 25 parts of isooctyl acrylate, 0.1 part of methacrylic acid, 0.1 part of acrylamide, 0.5 part of itaconic acid, 0.1 part of antioxidant, 2 parts of emulsifier, 0.1 part of initiator, 0.2 part of sodium hydroxide.
[0041] The antioxidant uses monophenolic hindered phenol.
[0042] The emulsifier is a composite emulsifier formed by mixing an anionic emulsifier and a nonionic emulsifier at a mass ratio of 1:1.
[0043] Further, the anionic emulsifier adopts C 10 -C 20 Alkyl sodium sulfate; the nonionic emulsifier adopts alkyl alcohol polyoxyethylene ether.
[0044] The initiator is potassium persulfate.
[0045] The preparation method of the described anti-yellowing styrene-acrylic elastic emulsion, comprises the following steps:
[0046] a) Preparation of base...
Embodiment 2
[0054] A kind of anti-yellowing styrene-acrylic elastic emulsion, by weight, comprises the following components: 100 parts of deionized water, 20 parts of styrene, 60 parts of butyl acrylate, 5 parts of acrylonitrile, 30 parts of isooctyl acrylate, 1 part of methacrylic acid, 1 part of acrylamide, 2 parts of itaconic acid, 1 part of antioxidant, 6 parts of emulsifier, 1 part of initiator, 1 part of sodium hydroxide.
[0055] The antioxidant uses bisphenol-type hindered phenol.
[0056] The emulsifier is a composite emulsifier formed by mixing an anionic emulsifier and a nonionic emulsifier at a mass ratio of 5:1.
[0057] The anionic emulsifier is phosphoric acid ester. The nonionic emulsifier adopts fatty alcohol polyoxyethylene ether.
[0058] The initiator is sodium persulfate.
[0059] The preparation method of the described anti-yellowing styrene-acrylic elastic emulsion, comprises the following steps:
[0060] a) Preparation of base liquid A: Add 35 parts of deionize...
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