第１８回知的財産翻訳検定＜第１０回和文英訳＞
１級

化学

標準解答

問1Question 1[Claim 1]

A manufacturing method of an extruded styrene-based resin foam body produced byextrusion foaming using a styrene-based resin and a blowing agent, characterized inthat the foam body contains 1-6 parts by weight of;(A) a mixed brominated flame retardant consisting oftetrabromobisphenol-A-bis(2,3-dibromo-2-methylpropyl ether) and tetrabromobisphenol
A-bis(2,3-dibromopropyl ether), or(B) a mixed brominated flame retardant consisting of tetrabromobisphenolA-bis(2,3-dibromo-2-methylpropyl ether) and tris(2, 3-dibromopropyl) isocyanurate,
as a flame retardant with respect to 100 parts by weight of the styrene-based resin,
wherein the content of tetrabromobisphenol A-bis(2,3-dibromo-2-methylpropyl ether) in
the mixed brominated flame retardant is from 25 wt. % to 75 wt. % to 100 wt. % of thewhole mixed brominated flame retardant, andwherein air bubbles forming the foam body are constituted of air bubbles having abubble diameter of 0.2 mm or less and of air bubbles having a bubble diameter of morethan 0.2 mm and 1 mm or less.
[Claim 2]
The manufacturing method of the extruded styrene-based resin foam body according toclaim 1, comprisinga step of preparing a molten composition which is heated after preliminarily mixing themixed brominated flame retardant, a phosphorus-based stabilizer and other additive
agents with the styrene-based resin, anda subsequent step of supplying the composition into an extrusion machine and heating
and melting the composition again.
問2Question 2[Background of the invention]

In recent years, the number of users of soft contact lenses (SCLs) has increased.
However, in general, when soft contact lenses are worn, oxygen supply from theatmosphere is reduced, which may lead to inhibition of corneal epithelial cell division
and/or corneal thickening. Therefore, soft contact lenses with higher oxygen
permeability have been developed.

Under these circumstances, silicone hydrogel contact lenses have recently beendeveloped as soft contact lenses having high oxygen permeability.

Silicone hydrogel

contact lenses having oxygen permeability many times higher than that of hydrogel
contact lenses of the conventional art have been achieved by blending a silicone with ahydrogel. These soft contact lenses are different from each other in ionicity, watercontent, and the like, depending on their material.

Thus, it is essential that eye drops

applied to the eyes of a person wearing soft contact lenses should be formulated
according to the characteristics of the soft contact lenses on the eyes to which the drops
are applied.
問３[Detailed description of the invention]
The barrier layer is made of one or more silicon compounds.

Examples of thesilicon compounds include silicon oxide, silicon nitride, silicon carbide, silicon oxynitride,and the like.

In particular, silicon nitride is preferably used in the present invention.

The use of silicon nitride provides a dense barrier layer and thus allows formation of athinner barrier layer showing desired gas barrier properties.
The thicker a silicon nitride film is, the darker in color and therefore the lesstransparent it is.

According to the present invention, the barrier layer is used incombination with a sealing film and an adhesive layer, as described later.

This allowsuse of a thinner and therefore more transparent barrier layer than a barrier layer usedalone in the conventional art.

Such a barrier layer is suitable for a top-emission typeorganic EL device.
The barrier layer may have any thickness that is sufficient to protect anorganic EL layer from oxygen, water vapor, etc. passing through the adhesive layer.
問４[Examples](1) Preparation of Graft Copolymer
To a reaction vessel equipped with a thermometer, a stirrer, a nitrogen inlet
tube, and a condenser, 25 parts by weight of polyvinyl butyral (degree of polymerization:1,700, butyral content: 68.0 mol%, hydroxyl content: 30.8 mol%, acetyl content: 1.2mol%), 25 parts by weight of isobutyl methacrylate, and 100 parts by weight of ethyl
acetate were added, and the polyvinyl butyral was dissolved with stirring.

After thereaction vessel was purged with nitrogen gas for 30 minutes, the solution was heated to75 degrees Celsius with stirring.

After 30 minutes, a polymerization initiator solution

prepared by diluting 0.5 part by weight of t-hexyl peroxypivalate, serving as apolymerization initiator, with 16 parts by weight of ethyl acetate was added dropwise tothe reaction vessel over 5 hours.
Celsius for 3 hours.

The solution was further reacted at 75 degrees

The reaction solution was cooled to obtain a graft copolymer

solution with a solid content of 30% by weight.