Novel silane-terminated polyether and synthesis method thereof

Abstract

The invention relates to novel silane-terminated polyether and a synthesis method thereof. The preparation method comprises the following steps: performing Michael addition reaction on 1.00 equivalent parts of polypropylene glycol acrylate and 2.00-4.00 equivalent parts of amino silane according to molar equivalent parts, and obtaining the modified polypropylene glycol acrylate based on the Michael addition reaction between an electricity-absorbing conjugated double bond and an amino group. The synthesis route does not need a catalyst, the reaction condition is mild, no by-product is generated, the process is simple and convenient, and the silane-terminated polyether can be obtained through one-step reaction. And the polyether without the electricity-absorbing conjugated double bond cannot react with the amino silane under the condition. Through matching of high-molecular-weight polypropylene glycol acrylate and low-molecular-weight polypropylene glycol acrylate, the rapidly-cured silane modified polyether can be obtained. Besides, the silane-terminated polyether synthesized by the synthesis route does not contain carbamate bonds, can avoid the defect of insufficient weather resistance of a polyurethane sealant through crosslinking of Si-O-Si bonds, has the advantage of excellent adhesion of a silicone sealant, and is expected to be applied to the field of prefabricated buildings.

Description

technical field [0001] The invention relates to a novel silane-terminated polyether and a synthesis method thereof, belonging to the field of polymer materials. Background technique [0002] The new silane-terminated polyether sealant (MS sealant) combines the advantages of polyurethane sealant and silicone sealant, and has excellent mechanical strength, construction, stain resistance, and adhesion. The raw materials and production processes do not contain Free isocyanate and organic solvents, with excellent environmental protection, in line with the development trend of new elastic sealing materials today. [0003] The MS sealant pioneered by Japan's Zhongyuan Chemical is the preferred material for sealants in prefabricated buildings. In recent years, China has vigorously promoted the development of prefabricated buildings. However, the market share of MS sealants in China is very low. The fundamental reason is that silane sealants Terminated polyether limited. Zhongyuan ...

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Problems solved by technology

[0003] The MS sealant pioneered by Japan's Zhongyuan Chemical is the preferred material for sealants in prefabricated buildings. In recent years, China has vigorously promoted the development of prefabricated buildings. However, the market share of MS sealants in China is very low. The fundamental reason is that silane sealants Polyether-terminated

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