THERMOSENSITIVE TACKIFIER

• Main Authors: MEGUMI TAKASHI, SAKO KEISUKE
• Format: Patent
• Language: English; Japanese
• Published: 08.12.2014
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; DYES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; PAINTS; POLISHES; USE OF MATERIALS AS ADHESIVES

PROBLEM TO BE SOLVED: To provide an easy-to-peel thermosensitive tackifier.SOLUTION: In a thermosensitive tackifier including a side-chain-crystalline polymer consisting of a copolymer (A) obtained by polymerizing a (meth)acrylate (A) including a linear alkyl group having at least 16 carbon atoms and a polar monomer (A) and exhibiting a tackifying force attenuation at a temperature equal to or lower than the freezing point of the side-chain-crystalline polymer, a crystallization accelerator consisting of a copolymer (B) obtained by polymerizing a (meth)acrylate (B) including a linear alkyl group having at least 16 carbon atoms and a polar monomer (B) and having a freezing point higher than the freezing point the side-chain-crystalline polymer is added to the side-chain-crystalline polymer. 【課題】剥離が容易な感温性粘着剤を提供することである。【解決手段】少なくとも炭素数１６以上の直鎖状アルキル基を有する（メタ）アクリレート（Ａ）および極性モノマー（Ａ）を重合させることによって得られる共重合体（Ａ）からなる、側鎖結晶性ポリマーを含有し、前記側鎖結晶性ポリマーの凍結点以下の温度で粘着力が低下する感温性粘着剤であって、前記側鎖結晶性ポリマーに、少なくとも炭素数１６以上の直鎖状アルキル基を有する（メタ）アクリレート（Ｂ）および極性モノマー（Ｂ）を重合させることによって得られる共重合体（Ｂ）からなり前記側鎖結晶性ポリマーの凍結点よりも高い凍結点を有する、結晶促進剤を添加するようにした。【選択図】なし