Polyurethane film with diffuse reflection and high transmittance and preparation method of polyurethane film
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A technology of polyurethane film and high transmittance, applied in the field of polyurethane film with diffuse reflection and high transmittance and its preparation
Inactive Publication Date: 2018-09-07
SHANGHAI WEIXING OPTICAL
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Problems solved by technology
There is no literature report on the preparation of anti-glare polyurethane film by usi
Method used
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[0024] Add 1,3-bis(isocyanatomethyl)benzene (m-xylylene-diisocyanate) and triethylamine into the closed container according to the above formula, stir at room temperature, and wait until the triethylamine is fully dissolved Add 1,1,3,3-tetrakis(mercaptomethylthio)propane dropwise, control the temperature at 45 degrees, react for 1-1.5h, when the NCO content is equal to the theoretical value, add methacrylic acid-2-hydroxyethyl Ester and hydroquinone and raise the temperature to 70 degrees, react for 3h, until all the NCO reacts completely and obtain the polyurethane prepolymer. Triethylamine is added dropwise, neutralization reaction is carried ...
[0033]Add 1,3-bis(isocyanatomethyl)benzene (m-xylylene-diisocyanate) and triethylamine into the closed container according to the above formula, stir at room temperature, and wait until the triethylamine is fully dissolved Add 1,1,3,3-tetrakis(mercaptomethylthio)propane dropwise, control the temperature at 45 degrees, react for 1-1.5h, when the NCO content is equal to the theoretical value, add methacrylic acid-2-hydroxyethyl Ester and hydroquinone and raise the temperature to 70 degrees, react for 3h, until all the NCO reacts completely and obtain the polyurethane prepolymer. Triethylamine is added dropwise, neutralization reaction is carr...
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Abstract
The invention relates to a preparation method of a polyurethane film with diffuse reflection and high transmittance. Polyisocyanate, an antioxidant and a catalyst are added to a closed container and stirred at the normal temperature, after the catalyst is sufficiently dissolved, polythioether mercaptan and polyester mercaptan are dropwise added, 2-hydroxyethyl methacrylate and hydroquinone are dropwise added, the temperature is increased to 70 DEG C for a reaction, and after NCO completely and fully reacts, a polyurethane prepolymer is obtained; triethylamine is added, a neutralization reaction is performed at the temperature of 50 DEG C, silica hydrosol is dropwise added, deionized water is added, the mixture is stirred and emulsified, monodisperse polymer microspheres, inorganic matter microspheres or composite microsphere suspensions of monodisperse polymer microspheres and inorganic matter microspheres are dropwise added, acetone is removed through a rotary evaporator, and a diffuse reflection polyurethane composite emulsion is obtained; the catalyst is added, ultrasonic dissolution and dispersion are performed, casting film forming is performed in a tetrafluoroethylene template, a film is dried in an oven at 120 DEG C for 8 h, and the polyurethane film with diffuse reflection and high transmittance is obtained. The polyurethane film has the characteristics of diffuse reflection, high transmittance and the like.
Description
technical field [0001] The invention relates to the technical field of lens production, in particular to a polyurethane film with diffuse reflection and high transmittance and a preparation method thereof. Background technique [0002] There are currently two ways to reduce glare. One is to use the principle of polarization. Light propagates in a straight line, which is the particle nature of light. At the same time, light also propagates in the form of waves, which is the wave nature of light. light waves. Light waves vibrate in all directions, and polarized light utilizes this wave nature of light. The core of the polarizing principle is the polarizing film. The polarizing film has a dichroic transparent film, which allows the light parallel to the direction of the light transmission axis to pass through, while the light perpendicular to this direction is absorbed. This phenomenon is called light polarization. change. The light passing through is the light in the same v...
Claims
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Application Information
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