Method of free radically polymerizing vinyl monomers
A technology of vinyl monomers and free radicals, applied in the field of free radical polymerization of vinyl monomers, can solve problems such as not easy to remove volatilization, low volatility, etc., achieve the elimination of heat transfer requirements, simple reaction equipment, easy to scale up to large The effect of mass production equipment
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[0107] Objects and advantages of this invention are further illustrated by the following examples, but the particular materials and amounts thereof recited in these examples, as well as other conditions and details, should not be construed to unduly limit this invention.
[0108] Material
[0109] demonstrative
[0110] demonstrative
example 1 to 5 and comparative example 1 to 3
[0112] Polymerization of IOA / AA (95 / 5) was performed in a two-step reaction using a VSP2 adiabatic reaction apparatus (available from Fauske and Associates, Burr Ridge IL) equipped with a 316 stainless steel test tank. Various scavenger monomers can be added in the first or second step.
[0113] In the first step of the polymerization, the VSP2 reactor was charged with: 70 g of a mixture consisting of 0.1 g of IRGANOX 1010, 93.01 g of IOA, 5.0 g of AA; 0.8 g of a mixture of 0.1 g of VAZO 52 and 80.0 g of IOA; 1.105 grams of a mixture consisting of 5.0 grams of IOTG and 80.0 grams of IOA; 0.4 grams of ABP (25% by weight in IOA). To this feed was added scavenger monomer in the amounts specified in Table 1 below. The reactor was sealed and oxygen was removed. The reaction mixture was heated to 60 °C, and the reaction was performed adiabatically. A typical maximum reaction temperature is 150°C. When the reaction was complete, the mixture was cooled to below 50 °C.
[0114] Ad...
example 6 and comparative example 4
[0118] Polymerization of IOA / MA / AA (70 / 22.5 / 7.5) was performed in a two-step reaction using a VSP2 adiabatic reaction apparatus (available from Fauske and Associates, Burr Ridge IL) equipped with a 316 stainless steel test tank. Various scavenger monomers can be added in the first or second step.
[0119] In the first step of the polymerization, the VSP2 reactor was charged with: 70 g of a mixture consisting of 0.1 g of IRGANOX 1010, 64.47 g of IOA, 7.5 g of AA, 22.5 g of MA; 4.01 g of 0.1 g of VAZO 52 and 80.0 g of IOA Composed mixture; 1.615 grams of a mixture consisting of 5.0 grams of IOTG and 80.0 grams of IOA; 0.3 grams of ABP (25% by weight in IOA). The reactor was sealed and oxygen was removed. The reaction mixture was heated to 60 °C, and the reaction was performed adiabatically. A typical maximum reaction temperature is 170°C. When the reaction was complete, the mixture was cooled to below 50 °C.
[0120] Add in the reaction product of the first step: 0.7 gram is...
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