Acetal glycol diacrylates and process for producing them

#The present invention relates to new acetal glycol diacrylates and a process for producing them.

#Recently, ultraviolet curing printing inks and paints are gaining wide applications. Various acrylic esters are used as vehicles in these printing inks and paints.

#After intensive investigations, the inventors have succeeded in producing new acetal glycol diacrylates having a high curing velocity and useful as vehicles in the ultraviolet curing printing inks and paints.

#436 parts of the acetal glycol of the following formula: ##STR4## obtained in Synthesis Example 1, 345.8 parts of acrylic acid, 11.8 parts of sulfuric acid, 3 parts of hydroquinone, 400 parts of benzene and 100 parts of cyclohexane were charged in a 2 liter reactor provided with a stirrer, thermostat, condenser and separator. The mixture was heated. Water formed was distilled together with the solvent and condensed. Water alone was taken out of the system by means of the separator and the solvent was returned into the reactor. When 72 parts of water was formed, the reaction mixture was cooled. The reaction temperature was 82.degree. to 90.degree. C. The reaction mixture was dissolved in 800 parts of benzene and 200 parts of cyclohexane. After neutralization with a 20% aqueous sodium hydroxide solution, it was washed with 400 parts of a 20% aqueous common salt solution three times. The solvents were distilled off under reduced pressure to obtain 498.3 parts of a light yellow liquid having the following structural formula: ##STR5##

#The product had the following properties:

#______________________________________ specific gravity (25.degree. C.): 1.083 viscosity (25.degree. C.): 304.5 cps saponification value: 334.7 mg KOH/g acid value: 0.06 mg KOH/g refractive index: 1.4715 (20.degree. C.) elementary analysis: C (%) H (%) 63.01 8.10 ______________________________________