Production method of high-solid-content ultra-high-molecular-weight acrylic ester copolymer emulsion

Abstract

The invention relates to a production method of an acrylic ester copolymer emulsion, in particular to a production method of a high-solid-content ultra-high-molecular-weight acrylic ester copolymer emulsion. According to the production method, an emulgator, a wetting agent, an emulsification dispersing agent, a pH conditioning agent and an oxidation-reduction initiator system are introduced into acrylic ester mixed monomer emulsion polymerization, by adopting one-time feeding, the oxidation-reduction system and an ultra-low temperature emulsion polymerization technology, an acrylic ester copolymer with high solid content (50-55%) and ultra-high molecular weight (the Mw range is 9.5 million-10.50 million, and the intrinsic viscosity eta range is 16-20) is prepared, a traditional old technology for producing a foaming conditioning agent is successfully replaced, and the adverse factors are overcome that the traditional foaming conditioning agent is generally low in molecular weight, widein distribution range, poor in flowability and low in melt strength, and the density of the finished product is difficultly lowered. The prepared emulsion is high in solid content, spray drying is easily achieved, the product moisture is easy to control, the energy is saved, and the consumption is lowered.

Description

technical field [0001] The invention relates to a production method of an acrylic ester copolymer emulsion, in particular to a production method of a high solid content ultra-high molecular weight acrylic ester copolymer emulsion. Background technique [0002] PVC is a well-loved, popular and widely used synthetic material in the world today. Its global usage ranks first among all synthetic materials. my country is the world's largest PVC production and consumption country, and related PVC products have a broad market environment, which is both powerful and broad. Based on the rapid development of urban and rural construction engineering, transportation engineering, environmental engineering, energy and water conservancy engineering, etc., the market demand for PVC building materials and engineering materials is increasing day by day, and it is currently one of the plastic varieties with the largest output in my country. [0003] Extruded PVC foam products have developed m...

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Problems solved by technology

[0013] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a method for producing a high-solid-content ultra-high molecular weight acrylic copolymer emulsion. The agent system is introduced into the emulsion polymerization of acrylate mixed monomers, and the high solid content (50-55%) ultra-high molecular weight (Mw range 9.5 million-10.5 million, Mw range 9.5 million-10.5 million, Intrinsic viscosity η range 16-20) acrylic ester copolymer, successfully replaced the old production process of traditional foaming regulators, improved the common problems of traditional foaming regulators such as small molecular weight and wide distribution, poor fluidity, insufficient melt strength, Unfavorable factors such as difficulty in reducing product density

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