UV-radiation curing has become a well-accepted technology because of its distinct advantages mainly as environmental benign, efficiency, less energy consumption and mild curing condition. The free radical photopolymerizations have been based mainly on acrylate systems, which polymerize rapidly and can be adjusted with ease to modify materials with different properties for different applications. The primary limiting factor of the approaches, however, is that the reactions would be inhibited by oxygen. A main method to tackle the problem is to add tertiary amine. Nevertheless, this causes new problems in the curing products, which turn yellow easily and their deposited period becomes short.In this work we have synthesized silicone modified polyacrylate (SPA) resins from bis[3-(trimethoxysilyl)propyl]amine (A1170) and polyethylene glycol diacrylate (SR-344) through Michael addition (Fig. 1). Without adding any extra tertiary amine, the structure of the obtained prepolymers could effectively solve the problem of oxygen inhibition.The DPC curves characterizing the UV curing behavior of the prepolymers are shown in Fig.2. With the SPA, the curing reaction in ambient atmosphere reached the maximum reaction rate at almost the same time as in N2, and the reaction rate in air is a little higher than in N2. The conversion of SPA in air is also a little higher than in N2. All these may be explained as follows. Tertiary amine can suppress the oxygen inhibition and produce more radicals. Tertiary amine may offer hydrogen to peroxide free radical produced in the oxygen inhibition process, the latter further decompose into alkyl radicals and hydroxide radicals.However, chain transfer and radicals terminations tend to occur, which made the rate reduced quiekly at later stages of the curing [1].