METHOD FOR PRODUCING POLYHYDRIC HYDROXY RESIN, METHOD FOR PRODUCING THERMOSETTING RESIN COMPOSITION, METHOD FOR PRODUCING SEALANT, METHOD FOR PRODUCING LAMINATED PLATE, POLYHYDRIC HYDROXY RESIN AND THERMOSETTING RESIN COMPOSITION

• Main Authors: ABE YUKIO, UEI YUSUKE, AMANO TATSU
• Format: Patent
• Language: English; Japanese
• Published: 29.08.2019
• Subjects: ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP

To provide a method for producing a polyhydric hydroxy resin having a small content of hydroquinone which can suppress clogging of piping in removing hydroquinone by distillation.SOLUTION: There is provided a method for producing a polyhydric hydroxy resin in which a high boiling point solvent having a boiling point of 180°C is made to coexist in a first polyhydric hydroxy resin containing a resin component represented by the following formula (1) and hydroquinone at a ratio of 5 to 50 mass% relative to the first polyhydric hydroxy resin, followed by performing steam distillation at 200 to 260°C to obtain a second polyhydric hydroxy resin reduced in a content of hydroquinone. In the formula, n is the number of repetitions and the average value of n is 0 to 20.SELECTED DRAWING: None 【課題】ハイドロキノンを蒸留により除去する際の配管の詰まりを抑制でき、ハイドロキノンの含有量の少ない多価ヒドロキシ樹脂が得られる多価ヒドロキシ樹脂の製造方法の提供。【解決手段】下記式（１）で表される樹脂成分およびハイドロキノンを含む第一の多価ヒドロキシ樹脂に、沸点が１８０℃以上の高沸点溶剤を、前記第一の多価ヒドロキシ樹脂に対して５〜５０質量％の割合で併存させ、２００〜２６０℃で水蒸気蒸留を行い、ハイドロキノンの含有量が低減された第二の多価ヒドロキシ樹脂を得る、多価ヒドロキシ樹脂の製造方法。式中、ｎは繰り返し数であり、ｎの平均値は０〜２０である。［化１］【選択図】なし