A kind of PPC resin derivative and online preparation method thereof
A technology of derivatives and resins, applied in the field of PPC resin derivatives and their on-line preparation, can solve the problem that the biodegradation performance of expanded beads needs to be further improved, and achieve improved mechanical properties and biodegradation performance, excellent processing performance, high barrier effect
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Embodiment 1
[0057] A kind of PPC resin derivative, its raw material comprises the following components in parts by weight: 100 parts of polyols, 15 parts of 4,4'-diphenylmethane diisocyanate, 2.4 parts of small molecule diols, 0.1 parts of stannous octoate, the polyhydric The alcohol is a mixture of polypropylene carbonate diol (molecular weight 1500) and polycaprolactone diol (molar ratio 12:1).
[0058] The small molecule diol is a mixture of 1,4-butanediol, propylene glycol and 1,4-cyclohexanediol, and the mass ratio of the three is 2:1:0.5.
[0059] The preparation method of PPC resin derivative, comprises the steps:
[0060] (1) Heating polyol, 4,4'-diphenylmethane diisocyanate, small molecule diol, and stannous octoate to 50°C at the same time, and mixing them to obtain mixture A;
[0061] (2) The mixture A is injected into the feed port of the twin-screw extruder through the pouring machine, 360mm×15 sections, the temperature of the 1-7 section is 130°C, the temperature of the 8-1...
Embodiment 2
[0063] A kind of PPC resin derivative, the only difference with embodiment 2 is that other polyhydric alcohol is the mixture of polyethylene adipate diol and sorbitol, both mass ratios are 2:1, and other conditions are all the same.
Embodiment 3
[0065] A kind of PPC resin derivative, its raw material comprises following components by weight: 100 parts of polyols, 60 parts of toluene diisocyanates, 17 parts of small molecular diols, 0.2 part of bismuth nitrate, described polyols are polycarbonate polyols and Mixture of other polyols (15:1 molar ratio).
[0066] Described polycarbonate polyol is the mixture of polyethylene carbonate diol (molecular weight 4000) and polypropylene carbonate diol (molecular weight 4000) (mass ratio is 1:6); Described other polyol is A mixture of polyphthalate diol and sorbitol (3:1 in mass ratio); the small molecule diol is a mixture of 1,4-butanediol, propylene glycol, and 1,4-cyclohexanediol , the mass ratio is 4:1:2.
[0067] The preparation method of PPC resin derivative, comprises the steps:
[0068] (1) Heating polyol, toluene diisocyanate, small molecule diol, and bismuth nitrate to 80°C simultaneously, and mixing them to obtain mixture A;
[0069] (2) Inject the mixture A into t...
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