Radical polymerizable polyurethane composition

Abstract

The invention relates to a radical polymerizable polyurethane composition. The polyurethane composition comprises polyurethane containing active olefinic bond and a reactive diluent. The polyurethane containing active olefinic bond is prepared from a component comprising (methyl) acrylate. The polyurethane composition has good operable time, relatively high heat distortion temperature and relatively low exothermic peak.

Description

technical field [0001] One aspect of the present invention relates to a free-radically polymerizable polyurethane composition comprising a reactive diluent C) and a polyurethane containing reactive ethylenic bonds. Another aspect of the present invention also relates to a polyurethane composite material prepared from the polyurethane composition. Background technique [0002] Due to its light weight and high mechanical strength, polyurethane composite materials have been widely used in many fields such as automobiles, construction, and fan blades. For example, WO2011069975 discloses a fan blade made of polyurethane composite material. [0003] Polyurethane composites have a variety of preparation methods, such as infusion, winding, pultrusion, hand lay-up, resin transfer molding, etc. Among them, the polyurethane vacuum infusion process is a relatively common method, which usually introduces the resin into the mold by forming a negative pressure in the mold, infiltrates th...

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Problems solved by technology

If the temperature is too high, it is very likely to damage the mold, and it may also cause the internal temperature of the cured resin to be too high to cause cracking, etc., which will damage the mechanical and physical properties of the cured resin.

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