A kind of silane-terminated resin containing carbamate group and preparation method thereof

Abstract

The invention belongs to the technical field of silane modified resin, and provides a silane blocking resin containing a urethane group and a preparation method of the silane blocking resin. The silane blocking resin is prepared from the following reaction raw materials comprising the following components (wherein the using amount of each component is 100% in terms of the total weight of the raw materials): (a) polyisocyanates with the using amount of 0 to 10 wt%; (b) a monohydric polymer, with a tetrahydropyrane ether group, with the using amount of 50 wt% to 99 wt%; and the reaction raw materials of the silane modified resin also comprises component (c) or (d), the component (c) is a silane coupling agent, with an isocyanate group, with the using amount of 0.2 wt% to 20 wt%; the component (d) comprises (d1) polyisocyanates with the using amount of 0.2 wt% to 20 wt%; and (d2) a silane coupling agent, with at least one active hydrogen, with the using amount of 0.2 wt% to 20 wt%. The resin obtained in the invention has a single molecular weight and is relatively narrow in distribution, and the viscosity is obviously improved while a preferable mechanical property is maintained.

Description

technical field

[0001] The invention belongs to the technical field of silane-modified resins, and in particular relates to a silane-terminated resin containing carbamate groups and a preparation method thereof. Background technique

[0002] Polyurethane has good adhesion to the substrate, and has the advantages of wear resistance, high mechanical strength, and good vibration absorption performance. It also has the characteristics of many composition changes and a wide range of adjustable structure and performance during synthesis. Therefore, polyurethane materials are used in many fields. Adhesives and sealants have a wide range of applications. However, polyurethane sealants have poor heat resistance and are easy to decompose at high temperatures. When used as a one-component moisture-curing adhesive, due to the existence of free isocyanate groups, air bubbles are likely to be generated during the curing process, which affects the bonding performance, and free isocyanate ...

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