Preparation and application of special foaming resin for polyether modified polyacrylate
A polyacrylate and polyether modification technology is used in the preparation and application of special foaming resins for polyether-modified polyacrylates, which can solve the problems of poor compatibility of silicone foam stabilizers and achieve good compatibility. , the effect of high closed cell rate and simple preparation process
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Embodiment 1
[0046] 80 parts by weight of acrylate monomer, 15 parts by weight of polypropylene glycol, 4 parts by weight of acrylic acid, 0.8 parts by weight of catalyst, and 0.2 parts by weight of initiator; wherein, the catalyst is p-toluenesulfonic acid as an example, and the initiator is azobisisobutyronitrile As an example, the acrylate monomer is methyl methacrylate, in which the molecular weight of polypropylene glycol is 400.
[0047] Prepare special foaming resin for polyether modified polyacrylate, such as figure 1 Shown:
[0048] S1: In a three-neck flask equipped with a stirrer, a thermometer, and a nitrogen device, the above weight parts of polypropylene glycol, p-toluenesulfonic acid, and 7.5 weight parts of acrylic acid were stirred and reacted at 55°C for 2 hours to obtain a double bond-containing Polyether precursor - polypropylene glycol diacrylate;
[0049] S2: Under the protection of nitrogen, add 150 parts by weight of xylene and raise the temperature to 60°C, disso...
Embodiment 2
[0054] 90 parts by weight of acrylate monomer, 7.75 parts by weight of polypropylene glycol, 2 parts by weight of acrylic acid, 0.2 parts by weight of catalyst, and 0.05 parts by weight of initiator; Acyl is taken as an example, acrylate monomer is n-butyl methacrylate as an example, wherein the molecular weight of the polypropylene glycol is 1000.
[0055] Preparation of special foaming resin for polyether modified polyacrylate:
[0056] S1: In a three-neck flask equipped with a stirrer, a thermometer, and a nitrogen device, the above weight parts of polypropylene glycol, p-xylenesulfonic acid, and 8.4 weight parts of acrylic acid were stirred and reacted at 60 ° C for 1 h to obtain a bis Bonded polyether precursor - polypropylene glycol diacrylate;
[0057]S2: Under the protection of nitrogen, add 168.8 parts by weight of xylene and raise the temperature to 60°C, dissolve the above parts by weight of n-butyl methacrylate, polyether precursor, and dibenzoyl peroxide in xylen...
Embodiment 3
[0062] 85 parts by weight of acrylate monomer, 10 parts by weight of polypropylene glycol, 4 parts by weight of acrylic acid, 0.9 parts by weight of catalyst, and 0.1 part by weight of initiator; wherein, the catalyst is p-toluenesulfonic acid as an example, and the initiator is azobisisobutyronitrile For example, the acrylate monomer is methyl methacrylate as an example, and the molecular weight of polypropylene glycol is 2000.
[0063] Preparation of special foaming resin for polyether modified polyacrylate:
[0064] S1: In a three-neck flask equipped with a stirrer, a thermometer, and a nitrogen device, the above weight parts of polypropylene glycol, p-toluenesulfonic acid, and 8 weight parts of acrylic acid were stirred and reacted at 72°C for 1 hour to prepare a double bond-containing Polyether precursor - polypropylene glycol diacrylate;
[0065] S2: Under the protection of nitrogen, add 160 parts by weight of xylene and heat up to 60°C, dissolve the above parts by weig...
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