Modified organic silica gel having color changing function

Abstract

The invention discloses a modified organic silica gel having a color changing function. The modified organic silica gel is prepared from the following components in percentage by mass: 40-70wt.% of thermochromic powder, 15-50wt.% of organic silicon adhesive, 15-50wt.% of hydroxypolyorganosiloxane, 20-55wt.% of dibutyl tin diacetate, 0.1-2.0wt.% of aluminate, 0.05-1.0wt.% of antioxidant and 0.1-1wt.% of calcium stearate. According to the modified organic silica gel having the color changing function, the formula is improved, and the thermochromic powder is added to the organic silicon adhesive to enable the organic silicon adhesive to have the light sensing and temperature sensing effects, and the formation of dead zones under hard light irradiation can be avoided. The modified organic silica gel having the color changing function is good in heat sealability, high in thermal shrinkage, easy to recover, and good in mechanical properties.

Description

technical field [0001] The invention relates to a modified organic silica gel with color-changing function. Background technique [0002] The adhesive of the silicone adhesive is a linear high molecular mass prepared by one or several linear, cyclic or branched siloxanes under the action of a catalyst through reactions such as equilibrium, addition or condensation. Or cross-linked siloxane composition. There are mainly two types of silicone adhesives: rubber type and resin type. Silicone adhesives have the characteristics of high temperature resistance, stable adhesion and good durability, and are widely used in various fields such as aviation, navigation, spacecraft, rockets and missiles, atomic energy, and electronic and electrical industries. [0003] With the gradual expansion of the application range of silicone adhesive tapes, all walks of life have put forward new requirements for the quality and properties of silicone adhesive tapes. Many irregular and differently...

AI Technical Summary

Problems solved by technology

[0004] Existing organic silica gel can only insulate heat and prevent ultraviolet rays, but there is no report on the organic silica gel that prevents strong light from changing color and solves the glare problem.

In addition, the existing organic silica gel has poor heat sealing performance, low heat shrinkage rate, is not easy to recycle, and its mechanical properties cannot meet the needs of the industry.