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Applicant: Bridgestone Corporation, Japan A photocurable composition is described that is intended to improve reworkability as a sealing material, while securing an adequate hardness. It contains a photocurable liquid resin, a (meth) acrylate monomer and a photopolymerization initiator. The photocurable composition is composed of a hydrogenated conjugated diene-aromatic vinyl copolymer containing a photocurable functional group and the photopolymerization initiator contains at least aminoacetophenone-based photopolymerization initiator.
π SIMILAR VOLUMES
Figure 2. The rigid portion, 11, prevents deformation. about 45". A narrow passage, 19. allows air to pass, but grease is scooped up by the rake face. The strength of the core metal, 11, within the extension, 16, prevents deformation under centrifugal forces at high speeds, and the leakage of greas
## Long history John Crane developed the first non-contacting, dry-running gas seal 30 years ago, according to Hosanna. He says that since then the Type 28 seals have been used in thousands of applications around the world. Many of the seals have been performing for 10 years or more.
or more of what are termed stress-control grooves on its surface. These grooves enable material to deform laterally and increase the contact stress between seal and counter-surface at the corners of the groove. The design is intended to preserve sealing integrity over wide temperature excursions exp