To provide an adhesive composition for a vehicle protective film that exhibits excellent adhesive force to an adherent and can form an adhesive layer excellent in alkali resistance and reworkability.SOLUTION: An adhesive composition for a vehicle protective film that contains: 100 pts.mass of a copolymer (A) containing 45 to 70 mass% of a constituent unit derived from an alkyl group-containing (meth) acrylic acid alkyl ester monomer having 1 to 2 carbon atoms, and 0.1 to 2.5 mass% of a constituent unit derived from a carboxyl group-containing (meth)acryl-based monomer, and has a Mw of 200,000 to 2,500,000; 5 to 35 pts.mass of a copolymer (B) containing 2.5 to 20 mass% of a constituent unit derived from a (meth)acryl-based monomer containing a hydroxy group, has a content rate of 0 to 0.2 mass% of a constituent unit derived from (meth)acryl-based monomer containing a carboxyl group, and has a Mw of 1000 to 8000; and 0.01 to 1 pt.mass of a metal chelate-based crosslinking agent and/or an isocyanate-based crosslinking agent (except for TDI and MDI), as well as its application.SELECTED DRAWING: None
【課題】被着体に対して良好な粘着力を示し、かつ、耐アルカリ性及びリワーク性に優れる粘着剤層を形成できる車両保護フィルム用粘着剤組成物、並びに車両保護フィルムの提供。【解決手段】炭素数1~2のアルキル基含有(メタ)アクリル酸アルキルエステル単量体由来の構成単位45~70質量%及びカルボキシ基含有(メタ)アクリル系単量体由来の構成単位0.1~2.5質量%含み、Mwが20万~250万の共重合体(A)100質量部と、水酸基含有(メタ)アクリル系単量体由来の構成単位2.5~20質量%含み、カルボキシ基含有(メタ)アクリル系単量体由来の構成単位の含有率が0~0.2質量%であり、Mwが0.1万~0.8万の共重合体(B)5~35質量部と、金属キレート系架橋剤及び/又はイソシアネート系架橋剤(TDI及びMDIを除く)0.01~1質量部と、を含む車両保護フィルム用粘着剤組成物、並びにその応用。【選択図】なし
ADHESIVE COMPOSITION FOR VEHICLE PROTECTIVE FILM AND VEHICLE PROTECTIVE FILM
車両保護フィルム用粘着剤組成物及び車両保護フィルム
2022-03-17
Patent
Electronic Resource
Japanese
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