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Low-temperature water-soluble PVA composition filled with modified starch and particles and preparation method thereof
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A technology of composition and starch, which is applied in the field of biodegradable materials, can solve problems affecting continuous production and processing, high processing costs, and low production capacity, and achieve the effects of accelerating biodegradation rate, excellent plastic performance, and reducing costs
Inactive Publication Date: 2020-07-24
BEIJING YISIDE LOGISTICS TECH
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[0049] In a second aspect, the present invention provides a method for preparing low-temperature water-soluble PVA particles filled with modified starch, the method comprising:
[0050] The low-temperature water-soluble PVA composition filled with the above-mentioned modified starch is subjected to the steps of mixing and granulating.
[0051] In the method of the present invention, there is no particular limitation on the preparation method of the low-temperature water-soluble PVA particles filled with the above-mentioned modified starch, which can be various preparation methods conventionally adopted by those skilled in the art, and will not be described again. In a specific embodiment of the present invention, it is prepared according to the following steps:
[0052] (1) Stir all the compositions described in a high-speed mixer at room temperature for 5-20 minutes;
[0053] (2) Using parallel twin-screw granulator to extrude and granulate to obtain low-temperature water-so...
Embodiment 1
[0063] Low-temperature water-soluble PVA composition filled with modified starch, comprising:
[0064] 80 parts by weight of PVA2088, 20 parts by weight of starch phosphate, 10 parts by weight of ethylene glycol, 15 parts by weight of sorbitol, 4 parts by weight of rare earth stabilizer, 1 part by weight of antioxidant 1010, 0.25 parts by weight of DLTP, glyceryl distearate 1 part by weight of ester, 0.1 part by weight of N,N'-bis(2,6-diisopropylphenyl)carbodiimide.
Embodiment 2
[0066] Low-temperature water-soluble PVA composition filled with modified starch, comprising:
[0067] 60 parts by weight of PVA2088, 15 parts by weight of PVA0388, 25 parts by weight of carboxymethyl starch, 15 parts by weight of hydroxyethyl urea, 15 parts by weight of mannitol, 2 parts by weight of epoxidized soybean oil, 1.5 parts by weight of phosphite-benzenediisooctyl 10760.75 parts by weight of antioxidant, 0.25 parts by weight of DSTP, 1.5 parts by weight of ethylene glycol monostearate, 0.3 parts by weight of poly-di(1,3,5-triisopropylphenyl) carbodiimide .
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Abstract
The invention relates to the field of biodegradable materials, and discloses a low-temperature water-soluble PVA composition filled with modified starch and particles and a preparation method thereof.The low-temperature water-soluble PVA composition filled with the modified starch is prepared from PVA, the modified starch, a compound plasticizer, a heat stabilizer, an antioxidant, a lubricant andan anti-hydrolysis agent, 100 parts by weight of a mixture of PVA and modified starch is added, wherein the content of the compound plasticizer is 15-60 parts by weight, the content of the heat stabilizer is 1-8 parts by weight, the content of the antioxidant is 0.5-6 parts by weight, the content of the lubricant is 0.5-6 parts by weight, and the content of the hydrolysis-resistant agent is 0.1-1part by weight. The addition amount of the biomass filler is increased by using the modified starch, and the environmental protection property of the PVA material is further improved.
Description
technical field [0001] The invention relates to the field of biodegradable materials, in particular to a low-temperature water-soluble PVA composition filled with modified starch, its particles and a preparation method. Background technique [0002] Biodegradable plastics are a type of plastics that can be degraded by microorganisms that exist in nature. The ideal biodegradable plastic is non-toxic and harmless after degradation, and has excellent performance. Polyvinyl alcohol (PVA) not only has the performance and characteristics of traditional plastics, but also can be split and degraded in water at different water temperatures or under natural conditions, and finally returns to the natural environment in the form of carbon dioxide and water. It is an excellent biodegradable plastic. Starch is a biomassraw material obtained from plants. It has the characteristics of low cost, renewable and completely biodegradable. Through certain chemical modification methods, such as ...
Claims
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