Resin composition for urethane optical lens having excellent thermal resistance and reactivity
A resin composition and optical lens technology, applied in optics, optical components, instruments, etc., can solve the problems of reducing reactivity, lens whitening, liquid leakage, etc., to reduce the reaction temperature, solve the problem of bubbles at the edge, and solve the problem of whitening Effect
Inactive Publication Date: 2011-06-29
KOC SOLUTION
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Problems solved by technology
However, the above-mentioned method can obtain good heat resistance when the content of isophorone diisocyanate (isophorone diisocyanate) or dicyclohexylmethane diisocyanate (dicyclohexylmethane diisocyanate) (dicyclohexylmethane diisocyanate) (dicyclohexylmethane diisocyanate) in the isocyanate (isocyanate) content is higher than 40% by weight, and at this time Due to the reduced reactivity with mercapto compounds, the reaction needs to be carried out at high temperature, and such a high reaction temperature will cause the adhesive of the adhesive tape that fixes the mold to dissolve and penetrate into the edge of the lens, resulting in whitening of the lens
In addition, as the temperature increases, liquid leakage occurs due to the expansion of the liquid composition, thereby generating air bubbles at the edge of the lens, resulting in defective
Therefore, the method of mixing more than 40% of isophorone diisocyanate (isophorone diisocyanate) or dicyclohexylmethane diisocyanate (dicyclohexylmethane diisocyanate) in the isocyanate (isocyanate) content is the best method to improve the heat resistance of the lens. method, but has problems with currently sold adhesive tapes
Method used
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Embodiment 1
[0049] Resin composition for optical lens
[0050]To 49.6 g of isophorone diisocyanate (isophorone diisocyanate) was added 3.9 g of 2,3-bis(2-mercaptoethylthio)propane-1-thiol (2,3-bis(2-mercaptoethylthio) propane -1-thiol) and 0.01g of dibutyltin chloride (dibutyltindichloride), and under nitrogen reflux conditions with 80 ° C for 8 hours to prepare the optical resin prepolymer of GSTIPDI0.1 and after cooling at room temperature, 4.2 g of 1,6-hexamethylene-1,6-diisocyanate, 33.2 g of 2,3-bis(2-mercaptoethylthio)propane-1-thiol ( 2,3-bis (2-mercaptoethylthio)propane-1-thiol) and 9.2g of pentaerythritol tetrakismercaptopropionate (pentaerythritoltetrakismercaptopropionate) to prepare a resin composition for optical lenses.
[0051] manufacture lens
[0052] (1) Put the resin composition for optical lens prepared as above into a mixing container capable of vacuum defoaming and stirring and maintain a temperature of 15° C., mix 0.1 g of ZELEC UN, 1.5 g of 2-( 2-hydroxy-5-t...
Embodiment 2～24
[0063] Using the same method as in Example 1, the respective compositions and lenses were prepared with the compositions shown in Tables 1-3, and physical property tests were performed, and the test results are recorded in Tables 1-3.
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The present invention relates to a resin composition for a plastic optical lens, and more specifically to a resin composition for a urethane optical lens having high thermal resistance and high reactivity. The resin composition for an optical lens of the present invention uses an optical resin prepolymer which is obtained from a preceding side reaction of a mercapto compound and a -SH / -NCO of isophorone diisocyanate or dicyclohexylmethanediisocyanate in appropriate mole ratios. The use of isophorone diisocyanate or dicyclohexylmethanediisocyanate results in enhancement of the thermal resistance of the optical lens, and the use of optical resin prepolymer at 20 to 70 weight % of the total weight of the resin composition for the optical lens, elutes the adhesive from adhesive tape due to lowered reactivity which results in a higher temperature reaction thereby resolving the problems of whitening phenomenon and foaming which occur on the edge of the lens due to a leak of the liquid composition when the reaction temperature increases.
Description
technical field [0001] The present invention relates to a plastic optical resin composition, particularly a resin composition for urethane-based optical lenses with high heat resistance and good reactivity. Background technique [0002] Urethane-based plastic optical lenses made of mercapto compounds and isocyanates are widely used as optical lens materials because of their optical lenses, that is, excellent transparency, Abbe number, and tensile strength. However, urethane-based plastic optical lenses have a low heat distortion temperature, so when hard coat treatment and multilayer coating treatment (coating anti-reflection film) are performed on the surface of the lens after casting, the center of the lens is deformed, and, If it is in a high temperature and humidity area or a high temperature place such as a sauna room, the multilayer coating film will be severely cracked due to the large thermal deformation of the lens. This will form a hazy film on the transparent sur...
Claims
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Login to View More IPC IPC(8): C08L75/04C08L67/04G02B5/30G02B1/10
Inventor 张东奎卢守均金钟孝金文一徐真武
Owner KOC SOLUTION