| abstract |
PURPOSE: To provide an initiator useful for the ultraviolet ray hardening reaction of silicone covered composite by treating a mixture of a 'linear alkylate' dodecylbenzene, potassium iodate, acetic anhydride and glacial acetic acid by a specified method. n CONSTITUTION: (i) One hundred parts by weight (herein referred to as part) of 'linear alkylate' dodecylbenzene, (ii) 30-60 parts of potassium iodate, (iii) 60-100 parts of acetic anhydride and (iv) 150-200 parts of glacial acetic acid are blended, and after cooling to -10°C-+10°C, (v) an acid solution formed of concentrated sulfuric acid and glacial acetic acid is added at a flow rate for keeping the mixture at a temperature of -5°C-+5°C, and (vi) 5-10 parts of a hydrogensulfate of a metal of the Ia or IIa group is successively added. Further, 30-60 parts of a salt selected from NaSbF 6 , NaAsF 6 , NaPF 6 , and NaBF 4 and (vii) 100-150 parts of an aliphatic organic solvent having a boiling point of 200°C or lower are added followed by stirring in a dark place for 2-4 hours, and, of the aqueous phase and nonaqueous phase obtained thereby, the non- aqueous phase is condensed to provide an ultraviolet ray hardening initiator formed of bis-(4-dodecylphenyl)iodonium salt of the formula (X is SbF 6 , AsF 6 , PF 6 , or BF 4 ). n COPYRIGHT: (C)1990,JPO |