Simulated sclera and simulated eyeball
A technology of sclera and eyeball, which is applied to teaching models, medical devices, coatings, etc., can solve problems such as difficult eyeball surgery exercises, and achieve excellent cutting and thin cutting sensations, excellent effects of cutting and thin cutting sensations
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[0229] Next, the present invention will be described based on production examples, examples, and comparative examples, but the present invention is not limited to the following examples. In addition, unless otherwise indicated, "part" and "%" are a mass basis. In addition, specific numerical values such as compounding ratios (content ratios), physical property values, and parameters used in the following descriptions may be replaced with their corresponding compounding ratios (content ratios) and physical property values described in the above-mentioned "Detailed Embodiments". The upper limit value (value defined in the form of "below" and "below") or the lower limit value (value defined in the form of "above" and "higher") correspondingly recorded in , parameters, etc.
[0230] In addition, the measurement methods used in each production example, each Example, and each comparative example are as follows.
[0231] 1. Measurement method
[0232]
[0233] The fiber layer...
preparation example 1
[0301] Production Example 1 (Isocyanate (b-1-1) (alcohol-modified isocyanurate derivative of PDI))
[0302] 1,5- 500 parts by mass of pentamethylene diisocyanate (hereinafter referred to as PDI), 6.9 parts by mass of isobutanol, 0.3 parts by mass of 2,6-di(tert-butyl)-4-methylphenol, tris(tridecylphosphite) ) 0.3 parts by mass of ester, and reacted at 80° C. for 2 hours.
[0303] Next, 0.05 parts by mass of 2-ethylhexanoic acid N-(2-hydroxypropyl)-N,N,N-trimethylammonium was blended as an isocyanuration catalyst. The isocyanate group concentration was measured, and the reaction was continued until the concentration thereof reached 48.3% by mass (ie, the conversion rate was 10% by mass). 0.12 mass parts of o-toluenesulfonamides were added after 20 minutes after reaching predetermined conversion rate (conversion rate 10 mass %). The obtained reaction mixture was passed through a thin film distillation apparatus (temperature: 150° C., vacuum degree: 0.093 kPa) to remove unreac...
preparation example 2
[0306] Preparation example 2 (isocyanate (b-1-2) (alcohol-modified isocyanurate derivative of HDI)
[0307] PDI was changed to 1,6-hexamethylene diisocyanate (manufactured by Mitsui Chemicals, trade name: Takenate 700 (hereinafter, referred to as HDI.)), except that, using the same method as in Preparation Example 1, the alcohol of HDI was obtained. Modified isocyanurate derivatives. Let this be isocyanate (b-1-2).
[0308] The isocyanate (b-1-2) had an average number of isocyanate groups of 2.9, an isocyanate monomer concentration of 0.5% by mass, an isocyanate group concentration of 22.1% by mass, and a viscosity at 25°C of 840 mPa·s.
[0309] Additionally, based on 1 The molar ratio of the allophanate group and the isocyanurate group measured by H-NMR was allophanate group / isocyanurate group=34.3 / 100.
[0310] (2-2) Polyol (b-2)
[0311] Preparation example 1 (polyol (b-2-1))
[0312] Polyoxyalkylene polyol (polyether polyol obtained by addition polymerization of propy...
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