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

Inactive Publication Date: 2018-06-15
上海巴德富实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When the styrene-acrylic elastic emulsion is used in exterior wall architectural coatings, since the styrene-acrylic emulsion contains styrene, the exterior wall coating prepared by the styrene-acrylic emulsion is prone to yellowing, which has a great impact on the decorative performance, so its application Broadness is very limited

Method used

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Examples

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preparation example Construction

[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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Abstract

The invention discloses a yellowing-resistant elastic styrene-acrylic emulsion and a preparation method thereof. The emulsion comprises the following components in parts by weight: 80-120 parts of deionized water, 15-25 parts of styrene, 55-65 parts of butyl acrylate, 3-10 parts of acrylonitrile, 25-35 parts of isooctyl acrylate, 0.1-1.5 parts of methacrylic acid, 0.1-1.5 parts of acrylamide, 0.5-3.5 of itaconic acid, 0.1-1.5 parts of an antioxidant, 2-10 parts of an emulsifier, 0.1-2 parts of an initiator, and 0.2-2.5 parts of sodium hydroxide. According to the method provided by the invention, the prepared elastic styrene-acrylic emulsion has excellent normal-temperature and low-temperature elasticity, and very good yellowing resistance; and the preparation process is simple, and the operability is high.

Description

technical field [0001] The invention relates to a styrene-acrylic emulsion and a preparation method thereof, in particular to a yellowing-resistant styrene-acrylic elastic emulsion and a preparation method thereof. Background technique [0002] When the styrene-acrylic elastic emulsion is used in exterior wall architectural coatings, since the styrene-acrylic emulsion contains styrene, the exterior wall coating prepared by the styrene-acrylic emulsion is prone to yellowing, which has a great impact on the decorative performance, so its application Broadness is severely limited. [0003] Therefore, how to develop a yellowing-resistant styrene-acrylic elastic emulsion is a difficult problem faced by the acrylate emulsion industry. Contents of the invention [0004] Aiming at the above-mentioned problems in the prior art, the present invention provides a yellowing-resistant styrene-acrylic elastic emulsion, which has excellent elasticity at room temperature and low temperatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F212/08C08F220/48C08F220/06C08F220/56C08F222/02C08F2/26C08F2/30C08F2/44C09D135/06
CPCC08F2/26C08F2/30C08F2/44C08F220/18C08F220/1804C09D135/06C08F212/08C08F220/48C08F220/1808C08F220/06C08F220/56C08F222/02
Inventor 江彬董宇军
Owner 上海巴德富实业有限公司
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