ROSIN-BASED EMULSION SIZING AGENT AND PAPER

• Main Authors: KANAHAMA RYO, SUDA MASAHIKO, HISAMOTO KEN, BU JINGXHOU
• Format: Patent
• Language: English; Japanese
• Published: 23.02.2017
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; IMPREGNATING OR COATING OF PAPER; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G

PROBLEM TO BE SOLVED: To provide a novel sizing agent using a reinforced rosin as an article to be emulsified and making the sizing effects good even with papers with large basis weight.SOLUTION: There is provided a rosin-based emulsion sizing agent by emulsifying reinforced rosin which is an addition reaction article of rosin (b1) and α,β unsaturated dicarboxylic acid (b2) and contains dibasic diterpene carboxylic acid of at least 0.5 wt.% and rosin esters (C) if needed in the presence of polymer dispersant (A) having an ionic functional group by copolymerizing an anionic unsaturated monomer, a hydrophobic unsaturated monomer and chain transferable unsaturated monomer.SELECTED DRAWING: None 【課題】強化ロジンを被乳化物とするサイズ剤であって、坪量が大きな成紙であってもそのサイズ効果を良好ならしめる新規なサイズ剤の提供。【解決手段】アニオン性不飽和単量体と、疎水性不飽和単量体と連鎖移動性不飽和単量体とを共重合したアニオン性官能基を有する高分子分散剤（Ａ）の存在下で、ロジン（ｂ１）とα，β不飽和ジカルボン酸（ｂ２）との付加反応物であって二塩基性ジテルペンカルボン酸を少なくとも０．５重量％含有する強化ロジン類（Ｂ）及び必要に応じてロジンエステル類（Ｃ）を乳化してなるロジン系エマルジョンサイズ剤。【選択図】なし