| 摘要 |
[Problem] To provide a photocurable sealing material which exhibits stable physical properties, particularly permanent compression set when subjected to a heat resistance test in an atmosphere of 100 to 150°C, and has a stable applying shape and storage stability. [Solution] A photocurable composition containing components (A) to (C) mentioned below, in which the mass ratio of the component (A) to the component (B) is 3 : 7 to 8 : 2;
component (A): a compound having a polymer of a (meth)acrylic monomer as a main skeleton and having one (meth)acryl group at each of the both terminals;
component (B): a compound having a polymer of a (meth)acrylic monomer as a main skeleton and having one (meth)acryl group at only one terminal; and
component (C): a photoinitiator. |
