A photoinitiator

cyanine dye-borate complex(CDBC)

sensitive to light of 680 nm was synthesized

and the factors affecting the viscosity

the curing time and the volumetric shrinkage ratio of resins

composed of CDBC

EA612 and POTMPTA were also studied．The experimental results showed that a high weight content of EA612 and a low weight content of POTMPTA resulted in high viscosity and low volumetric shrinkage ratio of the resin

and vice versa．The curing time of the resin decreased with the increasing of the weight content of CDBC

when the weight content of CDBC was not more than 3％．However．the curing time of resin did not decrease with the increasing of the weight content of CDBC

when the weight content of CDBC is more than 3％. When the weight content of CDBC was not more than 5％

the viscosity and the volumetric shrinkage ratio of resin had no relationship with the weight content of CDBC. When the weight contents of EA612

POTMPTA and CDBC were 70％

27％ and 3％

respectively

the viscosity of the resin was 420 mPa·s

the curing time of the resin was 1.0 s

the volumetric shrinkage ratio of the resin was 4.0％ and the cured resin exhibited good properties.