Adhesive composition

摘要

An curable adhesive composition that can form a cured product exhibiting high shear adhesion strength, peel adhesion strength and impact adhesion strength and exhibiting, in particular, excellent cold/hot cycle resistance of adhesion strength, includes (a) a 2-cyanoacrylic acid ester, (b) a high molecular-weight component, such as a polymer, compatible with the 2-cyanoacrylic acid ester, (c) a multifunctional 2-cyano-3-vinylacrylic acid ester, and (d) an onium salt represented by the following general formula (1):
C+A−  (1)
wherein C+ represents an onium cation, A− represents an anion such provided that the anion does not substantially initiate polymerization of the 2-cyanoacrylic acid, in which the curable adhesive contains components (b)-(d) in predetermined amounts relative to 100 parts by mass of the component (a).

主权项

1. An adhesive composition which comprises
(a) a 2-cyanoacrylic acid ester, (b) a high molecular weight component compatible with the 2-cyanoacrylic acid ester, (c) a multifunctional 2-cyano-3-vinylacrylic acid ester having 2 or more 2-cyano-3-vinylacryloyl groups, and (d) an onium salt represented by the following general formula (1):
C+A−  (1)wherein C+ represents an onium cation and A− represents an anion which does not substantially initiate polymerization of the 2-cyanoacrylic acid ester, andin which the contents of the components (b), (c), and (d) are from 2 to 50 parts by mass, from 1 to 200 parts by mass, and from 0.01 to 5 parts by mass, respectively, relative to 100 parts by mass of the component (a).