High-barrier polyurethane self-repairing composition and preparation method thereof
A polyurethane and self-healing technology, applied in polyurea/polyurethane coatings, coatings, anti-corrosion coatings, etc., can solve the problems of poor dispersion stability and achieve high barrier properties and enhanced anti-corrosion properties
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[0033]
[0034] High barrier polyurethane self-repair compositions include: polyisocyanate, polyol, chain extender, graphene microcapsules, anti-aging aid, talc, catalyst.
[0035] The quality ratio of the above substance is:
[0036] Multiolyocyanate: Polyol: chain extender: graphene microcapsules: anti-aging auxiliaries: talc: catalyst = 28.6: 56.2: 5.2: 5: 1: 3: 2.
[0037] In the present embodiment, polyisocyanate is selected from the group consisting of diphenyl methane diisocyanate (MDI, Wanhua Chemical), polyols of polytetramethylene ether glycol (PTMEG1000, BASF), chain extender selected from 1, 4-buta glycol (BDO), catalyst is selected from the group consisting of dibutyl tin (Chemical) and triethylamine (Huaruheng Sheng), of which the mass ratio of Dikutini and triethylamine in February is 1.3: 1 .
[0038] like figure 1 As shown, the graphene microcapsules are double wrap structures, and the wall material 10 is a methacrylonitrile, the center core material 30 is the in...
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