Total-starch type biodegradable plastic
A technology for biodegradable plastics and all-starch, applied in the field of completely degradable plastics, can solve the problems of unsatisfactory comprehensive use performance of all-starch plastics, lack of thermoplastic properties, strength and stretch, and inability to be processed with plastic products, etc. Achieve good thermoplastic processing performance, low price and reduced production cost
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Embodiment 1
[0030] The amount of raw materials and parts by weight:
[0031] 90 parts of dialdehyde starch with an oxidation degree of 40% to 60%,
[0032] 3.0 parts of dodecenyl succinic anhydride,
[0033] DCP (initiator) 0.2 parts,
[0034] 5.0 parts of dibutyl adipate,
[0035] 2.0 parts of 1,4-butanediol bis(β-aminobutenoic acid) ester,
[0036] 2.0 parts of liquid paraffin,
[0037] PCL 3.0 copies.
[0038] The dialdehyde starch in the raw material can be prepared with reference to the method of "Process for oxidation of starch" of patent GB943664.
[0039] According to the conventional method of plastic processing, the PCL and dibutyl adipate in the raw materials are stirred and melted at a high speed at a temperature of 150℃-180℃. Add the initiator DCP, modifier dodecenyl succinic anhydride, stabilizer 1,4-butanediol bis(β-aminobutenoic acid) ester and lubricant liquid paraffin just before the melting is completed to make the material completely melt And mix well. Then the dialdehyde ...
Embodiment 2
[0044] Dosage of components and parts by weight:
[0045] 95 parts of dialdehyde starch (same as Example 1),
[0046] 2.0 parts of maleic anhydride,
[0047] 0.6 copies of BPO,
[0048] 4.0 parts of bis(2-ethylhexyl) adipate (DOA),
[0049] 3.0 parts of sorbitol,
[0050] 1.0 part of polyethylene wax,
[0051] 5.0 copies of PGA.
[0052] Operate according to the same feeding method and conditions as in Example 1, to obtain the corresponding full starch biodegradable plastic resin.
Embodiment 3
[0054] Dosage of components and parts by weight:
[0055] Dialdehyde starch (same as Example 1) 92 parts,
[0056] 1.0 part of octadecenoic acid,
[0057] DCP / BPO(1∶1) 1.0 copies,
[0058] Glycerin / ethylene glycol (1∶1) 2.0 parts,
[0059] 1.5 parts of pentaerythritol,
[0060] 1.5 parts of stearic acid,
[0061] PVA / plant fiber (1:1) 6.0 parts.
[0062] Operate according to the same feeding method and conditions as in Example 1, to obtain the corresponding full starch biodegradable plastic resin.
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