Transparent molded objects, and processes for producing these
A shaped, transparent technology that can be used in other household appliances, applications, instruments, etc., to solve problems such as impossibility and inability to obtain mold release
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Embodiment 1
[0229]The isocyanate-terminated prepolymer containing 13% isocyanate groups (expressed as ITP -1) Add 0.024 parts by weight of monobutoxyethyl acid phosphate (expressed as MBP in Table 1) and 0.036 parts by weight of di(butoxyethyl) acid phosphate (expressed as DBP in Table 1) , to make it dissolve evenly and defoam. Then at 60-70°C, uniformly mix into it the mixture formed by 3,5-diethyl-2,4-toluenediamine and 3,5-diethyl-2,6-toluenediamine (Table 1 Expressed as DETDA) 25.5 parts by weight, high-speed stirring for a short time. Furthermore, the mixture obtained after stirring was quickly poured into a glass mold for lens molding, heated and polymerized at 120° C. for 15 hours, and a plastic lens (transparent molded article) was obtained. Various physical properties of the obtained plastic lenses are shown in Table 1. As can be seen from Table 1, the obtained plastic lens had excellent release properties when taken out of the glass mold, and no breakage of the lens or the g...
Embodiment 2～7
[0231] Except having used the components shown in Table 1, it carried out similarly to Example 1, and obtained the plastic lens (transparent molding). Various physical properties of these plastic lenses are shown in Table 1. As can be seen from Table 1, the obtained plastic lens was free from damage to the lens and the glass mold, had excellent mold release properties when taken out of the glass mold, and did not have blurring due to turbidity or crystallites that would cause scattering. It is a lens excellent in transparency. In addition, the lens is not broken not only when a 16g steel ball prescribed by the FDA standard is used for a drop ball test, but also when a 1kg drop ball test is performed, so it is a lens with excellent impact resistance.
Embodiment 8-1
[0275] (Preparation of Coating Solution)
[0276] Add 141 parts by weight of water-dispersed colloidal silicon dioxide (solid content 40%, average particle diameter 15 nanometers; component (F)) in the glass container equipped with magnetic stirrer, add 30 parts by weight of acetic acid under stirring, fully To mix and stir. Then, 74 parts by weight of (gamma)-glycidoxypropyltrimethoxysilane (component (E)) was dripped there, and it stirred at 5 degreeC for 24 hours. Then add 100 parts by weight of propylene glycol monomethyl ether, 150 parts by weight of isopropanol, and then add 0.2 parts by weight of a silicone-based surfactant and 7.5 parts by weight of aluminum acetylacetonate as a curing agent. Apply the composition liquid.
[0277] (formation of cured film)
[0278] Soak the plastic lens (transparent molded body) prepared in the above-mentioned Example 1 in 55° C., 10% aqueous sodium hydroxide solution for 5 minutes, thoroughly wash it, and then use the coating liqui...
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Abstract
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