Low cis-polybutadiene rubber and preparation method thereof, HIPS (High Impact Polystyrene) resin and preparation method thereof, as well as ABS resin
A technology of polybutadiene rubber and cis-polybutadiene, which is applied in the field of ABS resin, low-cis-polybutadiene rubber and its preparation, can solve problems such as difficult to obtain impact resistance, achieve high solution viscosity, The effect of high impact resistance
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[0022] The second aspect of the present invention provides a kind of preparation method of above-mentioned low-cis polybutadiene rubber, the method comprises:
[0023] (1) In a non-polar hydrocarbon solvent, in the presence of an organolithium initiator and a structure regulator, 1,3-butadiene is subjected to anionic solution polymerization, and the conversion rate to 1,3-butadiene is More than 99% to obtain polybutadiene active chains with a number average molecular weight of 80,000-100,000; the molar ratio of 1,3-butadiene to the organolithium initiator is 1450-1850:1;
[0024] (2) In the presence of a coupling agent, the product of the anionic solution polymerization reaction is subjected to a coupling reaction; the molar ratio of the coupling agent to the organolithium initiator is 0.14-0.3:1;
[0025] (3) Terminating the product of the coupling reaction in the presence of a terminator.
[0026] According to the present invention, the preparation method of this low-cis po...
Embodiment 1
[0088] This example is used to illustrate the LCBR rubber of the present invention and its preparation method.
[0089] (1) Under the protection of nitrogen, organic solvent, 1,3-butadiene monomer and structure regulator (see Table 1 for the type and amount, and the amounts listed in the table are all measured as pure compounds) are added to the reactor, And after being heated to specified temperature, add organolithium initiator (type and consumption are shown in Table 1, and the consumption listed in the table is all metered with pure compound), then carry out anionic solution polymerization reaction (conditions are shown in table) under this temperature and specified reaction pressure 1), obtain the monomer conversion rate shown in table 1;
[0090] (2) then in the product of anionic solution polymerization, add coupling agent (its kind and consumption are shown in Table 2, and the consumption listed in the table is all measured with pure compound), to carry out coupling re...
Embodiment 2-5
[0093] This example is used to illustrate the LCBR rubber of the present invention and its preparation method.
[0094] According to the method described in Example 1, the difference is that the parameters shown in Tables 1 and 2 were used for the reaction, thereby obtaining LCBR rubbers PB2-PB5 respectively, and the structure and properties of the obtained polymer were determined, and the results are shown in Table 3.
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