Water-soluble composite containing thermoplastic PVA (polyvinyl alcohol) and preparation method of water-soluble composite containing thermoplastic PVA
A technology of polyvinyl alcohol and polyvinyl alcohol resin, which is applied in the field of compound preparation, can solve problems such as poor melt fluidity, achieve low crystallinity, high decomposition temperature, and improve the effect of HLB value
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Embodiment 1
[0026] Example 1, a thermoplastic polyvinyl alcohol water-soluble compound, in the form of fine particles, with a particle size of 180-200 mesh, composed of thermoplastic polyvinyl alcohol resin and linear random polymer, thermoplastic polyvinyl alcohol resin and linear random polymer The weight ratio of the material is 80:20.
[0027] The thermoplastic polyvinyl alcohol resin is preferably water-soluble polyvinyl alcohol resin at normal temperature, its water-soluble temperature is 25-30°C, its degree of alcoholysis is 70-92mol / mol, and its degree of polymerization is between 300-2000. Thermoplastic polyvinyl alcohol resin is composed of polyvinyl alcohol PVA and plasticizer. The weight ratio of polyvinyl alcohol PVA to plasticizer is 50:50. The plasticizer is glycerol, polyethylene glycol, water, starch One of.
[0028] The melt index of thermoplastic polyvinyl alcohol resin is 1-10g / 10min, and the melting point is between 120-200°C; the linear random polymer is polyethylen...
Embodiment 2
[0039] Example 2 differs from Example 1 in that the particle size of the thermoplastic polyvinyl alcohol water-soluble compound is 40-60 mesh. The weight ratio of thermoplastic polyvinyl alcohol resin to linear random polymer is 99.9:0.1.
[0040] The weight ratio of polyvinyl alcohol to plasticizer is 90:10, and the plasticizer is two kinds of glycerol, polyethylene glycol, starch, and water in a ratio of 2:1.
Embodiment 3
[0041] Example 3. The difference from Example 1 is that the particle size of the thermoplastic polyvinyl alcohol water-soluble compound is 100-120 mesh. The weight ratio of thermoplastic polyvinyl alcohol resin to linear random polymer is 90:10.
[0042] The weight ratio of polyvinyl alcohol to plasticizer is 90:10, and the plasticizer is glycerol, polyethylene glycol, water and starch and is combined in a ratio of 2:1:1.
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