Fine emulsion polymerization method of polyurethane acrylic ester compound emulsion
A technology of miniemulsion polymerization and acrylate, which is applied in the field of miniemulsion polymerization of polyurethane-acrylate composite emulsion, can solve the problems of environmental pollution and low conversion rate of acrylate monomer, and achieve superior mechanical properties, excellent comprehensive performance, The effect of high adhesion
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Embodiment 1
[0022] A kind of miniemulsion polymerization method of embodiment 1 polyurethane-acrylic acid ester composite emulsion, it is characterized in that comprising the steps:
[0023] The first step is to dehydrate the polyol polymer in the reaction kettle at a temperature of 60-140°C and a vacuum of 0.01-0.3MPa for 0.2-8 hours for use in the polymerization of acrylate monomers, polyisocyanates and polyols. The chain extender is dehydrated through a molecular sieve with a pore size of 4 Ȧ,
[0024] In the second step, feed nitrogen into the reactor for 5 to 80 minutes, add 100 parts by mass of dehydrated polyol polymer and 0.1 to 5 parts by mass of polyisocyanate and polyol polymerization catalyst to stir, in this embodiment , polyisocyanate and polyol polymerization catalyst can be taken as 0.3 part, 0.8 part, 1 part, 2.5 part, 4 parts, 5 parts, and the polyisocyanate of 30-300 parts of quality is added dropwise, can be selected as 40 in the present embodiment parts, 70 parts, 10...
Embodiment 2
[0036] Embodiment 2: a kind of miniemulsion polymerization method of polyurethane-acrylate composite emulsion, comprises the steps:
[0037] The first step is to dehydrate the polyol polymer in the reaction kettle at a temperature of 60-140°C and a vacuum of 0.01-0.3MPa for 0.2-8 hours for use in the polymerization of acrylate monomers, polyisocyanates and polyols. The chain extender is dehydrated through a molecular sieve with a pore size of 4 Ȧ,
[0038] In the second step, feed nitrogen into the reactor for 5 to 80 minutes, add 100 parts by mass of dehydrated polyol polymer and 0.1 to 5 parts by mass of polyisocyanate and polyol polymerization catalyst to stir, in this embodiment , polyisocyanate and polyol polymerization catalyst can be taken as 0.3 part, 0.8 part, 1 part, 2.5 part, 4 parts, 5 parts, and the polyisocyanate of 30-300 parts of quality is added dropwise, can be selected as 40 in the present embodiment parts, 70 parts, 100 parts, 140 parts, 190 parts, 220 par...
Embodiment 3
[0050] A kind of miniemulsion polymerization method of polyurethane-acrylate composite emulsion, it is characterized in that comprising the steps:
[0051] The first step is to dehydrate the polyol polymer in the reaction kettle at a temperature of 60-140°C and a vacuum of 0.01-0.3MPa for 0.2-8 hours for use in the polymerization of acrylate monomers, polyisocyanates and polyols. The chain extender is dehydrated through a molecular sieve with a pore size of 4 Ȧ,
[0052] In the second step, feed nitrogen into the reactor for 5 to 80 minutes, add 100 parts by mass of dehydrated polyol polymer and 0.1 to 5 parts by mass of polyisocyanate and polyol polymerization catalyst to stir, in this embodiment , polyisocyanate and polyol polymerization catalyst can be taken as 0.3 part, 0.8 part, 1 part, 2.5 part, 4 parts, 5 parts, and the polyisocyanate of 30-300 parts of quality is added dropwise, can be selected as 40 in the present embodiment parts, 70 parts, 100 parts, 140 parts, 190...
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