POLYESTER-BASED ADHESIVE COMPONENT AND ADHESIVE SHEET THEREOF

To provide a polyester-based adhesive that is excellent in all of the characteristics of adhesive strength, heat/humidity resistance, heat resistance, holding power and transparency, and is used for a label, an adhesive tape or a sheet and the like.SOLUTION: Provided is an adhesive composition conta...

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Bibliographic Details
Main Authors YOSHINO NORITO, AWATA TATSUYA
Format Patent
LanguageEnglish
Japanese
Published 10.10.2019
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Summary:To provide a polyester-based adhesive that is excellent in all of the characteristics of adhesive strength, heat/humidity resistance, heat resistance, holding power and transparency, and is used for a label, an adhesive tape or a sheet and the like.SOLUTION: Provided is an adhesive composition containing a polyester resin (A) and an isocyanate curing agent (B) satisfying the following (1) to (4). (1) the polyester resin (A) includes a polyester segment (A-1), a polycarbodiimide segment (A-2), and an urethane segment (A-3). (2) when the polyester segment (A-1) has a polyvalent carboxylic acid component and a polyhydric alcohol component as a copolymerization component, and when the polyvalent carboxylic acid component is 100 mol%, the content of aromatic dicarboxylic acid component is 10 mol% or more. (3) when the polyhydric alcohol component of the polyester segment (A-1) is 100 mol%, the content of a glycol component having a hydrocarbon group in the side chain is 10 mol% or more. (4) the polyester resin (A) contains a metal, and the content of the metal is 10 ppm or more and 100 ppm or less.SELECTED DRAWING: None 【課題】 粘着力、耐湿熱性、耐熱性、保持力および透明性の特性が共に優れ、ラベル、粘着テープもしくはシート等に使用されるポリエステル系粘着剤を提供すること。【解決手段】 下記(1)〜(4)を満足するポリエステル樹脂(A)、イソシアネート硬化剤(B)を含有する粘着剤組成物。(1)ポリエステル樹脂(A)が、ポリエステルセグメント(A−1)、ポリカルボジイミドセグメント(A−2)およびウレタンセグメント(A−3を含む。)(2)ポリエステルセグメント(A−1)が多価カルボン酸成分と多価アルコール成分を共重合成分とし、多価カルボン酸成分を100モル%としたとき、芳香族ジカルボン酸成分の含有量が10モル%以上である。(3)ポリエステルセグメント(A−1)の多価アルコール成分を100モル%としたとき、側鎖に炭化水素基を有するグリコール成分の含有量が10モル%以上である。(4)ポリエステル樹脂(A)が金属を含み、その金属含有量が10ppm以上100ppm以下である。【選択図】 なし
Bibliography:Application Number: JP20180064261