CN111269465A - Starch master batch composition for PVA thermoplastic processing, starch master batch and preparation method thereof - Google Patents
Starch master batch composition for PVA thermoplastic processing, starch master batch and preparation method thereof Download PDFInfo
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
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- C08J2329/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2329/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2329/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- C08J2403/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2403/02—Starch; Degradation products thereof, e.g. dextrin
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- C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2429/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2429/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- C08J2491/00—Characterised by the use of oils, fats or waxes; Derivatives thereof
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
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- C08K5/05—Alcohols; Metal alcoholates
- C08K5/053—Polyhydroxylic alcohols
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- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
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- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
- C08K5/526—Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds
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- C08K5/00—Use of organic ingredients
- C08K5/56—Organo-metallic compounds, i.e. organic compounds containing a metal-to-carbon bond
- C08K5/57—Organo-tin compounds
Abstract
The invention belongs to the field of biodegradable materials, and discloses a starch master batch composition for PVA thermoplastic processing, a starch master batch and a preparation method thereof. The starch master batch composition for PVA thermoplastic processing comprises: starch, a PVA carrier, a micromolecular plasticizer, a macromolecular plasticizer, a thermal decomposition inhibitor, a thermal oxidation resistant aging agent and a lubricant; relative to 100 parts by weight of a mixture of starch and a PVA carrier, the content of the small-molecule plasticizer is 10-55 parts by weight, the content of the large-molecule plasticizer is 1-10 parts by weight, the content of the thermal decomposition inhibitor is 1-8 parts by weight, the content of the thermal oxidation aging resistant agent is 0.5-6 parts by weight, and the content of the lubricant is 0.5-6 parts by weight. The starch master batch for PVA thermoplastic processing provided by the invention can be used as a filling starch master batch in PVA granulation, so that the cost of PVA is reduced.
Description
Technical Field
The invention relates to the field of biodegradable materials, and in particular relates to a starch master batch composition for PVA thermoplastic processing, a starch master batch and a preparation method thereof.
Background
Polyvinyl alcohol (PVA) can be dissolved in water at different temperatures, has higher mechanical property, good transparency and high oil resistance and corrosion resistance, can be split and degraded under natural conditions, and finally biodegraded into carbon dioxide and water which return to natural environment, thereby being a biodegradable environment-friendly material. Starch is a biomass raw material obtained from plants, has the characteristics of low cost, reproducibility, complete biodegradation and the like, and the preparation of the biomass-filled biodegradable plastic by blending the starch raw material and the degradable resin is one of the research hotspots in recent years.
The PVA water-soluble film is mostly produced and prepared by a solution casting method, the processing cost is extremely high, the productivity is low, the thermoplastic processing of the traditional plastic film bag, such as a blow molding film forming method, is a processing mode with low energy consumption and high productivity, but the processing difficulty of the blow molding film forming is larger because the melting temperature and the decomposition temperature of the PVA are close.
In consideration of the degradation characteristic of the PVA raw material, the addition of the PVA master batch for thermoplastic processing can not only reduce the cost, but also accelerate the degradation of the thermoplastic processing PVA under natural conditions, thereby improving the content of the starch master batch in the formula, and simultaneously, the addition of the auxiliary agent shared by the PVA and the starch reduces the difficulty of the PVA raw material in the thermoplastic processing process.
Disclosure of Invention
The invention aims to reduce the difficulty of granulating and processing PVA raw materials and reduce the cost, and provides a starch master batch composition for thermoplastic processing of PVA, starch master batches and a preparation method thereof. The starch master batch for thermoplastic processing of PVA can be added in the process of granulating or thermoplastic film forming of PVA, so that the cost of PVA is reduced.
In order to achieve the above object, a first aspect of the present invention provides a PVA starch concentrate composition for thermoplastic processing, comprising: starch, a PVA carrier, a micromolecular plasticizer, a macromolecular plasticizer, a thermal decomposition inhibitor, a thermal oxidation resistant aging agent and a lubricant;
relative to 100 parts by weight of a mixture of starch and a PVA carrier, the content of the small-molecule plasticizer is 10-55 parts by weight, the content of the large-molecule plasticizer is 1-10 parts by weight, the content of the thermal decomposition inhibitor is 1-8 parts by weight, the content of the thermal oxidation aging resistant agent is 0.5-6 parts by weight, and the content of the lubricant is 0.5-6 parts by weight.
Preferably, the content of the small molecule plasticizer is 25 to 55 parts by weight, the content of the large molecule plasticizer is 2 to 10 parts by weight, the content of the thermal decomposition inhibitor is 3 to 5 parts by weight, the content of the thermal aging resistant agent is 1 to 4 parts by weight, and the content of the lubricant is 1 to 4 parts by weight, relative to 100 parts by weight of the mixture of the PVA carrier and the starch.
Preferably, the content of the starch in the mixture of the PVA carrier and the starch is more than or equal to 60 parts by weight.
Preferably, the starch is one or more of corn starch, potato starch, tapioca starch, wheat starch, sorghum starch and mixed bean starch.
Preferably, the degree of polymerization of the PVA is 300-2600.
Preferably, the alcoholysis degree of the PVA is more than or equal to 88 percent.
More preferably, the PVA is one or more of grade 0588, 1788, 2088, 2288, 2488.
Preferably, the small molecule plasticizer is one or more of glycerol, diglycerol, triglycerol, decaglycerol, sorbitol, mannitol, diethanolamine, triethanolamine, and diethylene glycol.
Preferably, the macromolecular plasticizer is PEG-3000, PEG-4000, PEG-6000, PEG-8000, PEO, PBAT, PLA or PBS.
Preferably, the thermal decomposition inhibitor is one or more of sorbitan stearate, myristic acid, butyl epoxystearate, an organotin stabilizer, a rare earth stabilizer, epoxidized soybean oil, and magnesium hydroxide.
Preferably, the anti-thermal oxidative aging agent is two or more of antioxidants 697, 1024, 1076, 1098, 1010, 626, 168, DLTP and DSTP.
Preferably, the lubricant is one or more of liquid paraffin, polyethylene wax, oxidized polyethylene wax, hardened oil, triglycerol monostearate, and pentaerythritol stearate.
In a second aspect, the present invention provides a method for preparing starch masterbatch for PVA thermoplastic processing, the method comprising:
the starch master batch composition for PVA thermoplastic processing is subjected to mixing, granulation and molding.
In a third aspect, the invention provides a PVA thermoplastic processing starch masterbatch prepared by the method of the invention.
Preferably, the PVA starch master batch for thermoplastic processing has the water content of 0.1-0.3 wt%.
Preferably, the PVA starch masterbatch for thermoplastic processing has a melt flow rate of 0.1-1g/10min under a load of 2.16kg and at 220 ℃.
Compared with the prior art, the invention has the following beneficial effects:
1. the starch master batch for thermoplastic processing of PVA can be added in the process of granulating or thermoplastic film forming of PVA, so that the cost of PVA is reduced;
2. the starch master batch composition for PVA thermoplastic processing provided by the invention improves the addition amount of starch, further improves the environmental protection performance of the PVA material filled with the starch, and accelerates the degradation rate of PVA under natural conditions;
3. the starch master batch for thermoplastic processing of PVA is added into PVA material, and the formed starch filled PVA has excellent plastic performance, is suitable for packaging products, and is particularly suitable for various packaging bags and/or sealing bags.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The present invention will be described in detail below by way of examples. In the following examples, each material used was commercially available unless otherwise specified, and the method used was a conventional method in the art unless otherwise specified.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
In a first aspect, the present invention provides a PVA starch concentrate composition for thermoplastic processing, wherein the PVA starch concentrate composition for thermoplastic processing comprises: starch, a PVA carrier, a small molecular plasticizer, a large molecular plasticizer, a thermal decomposition inhibitor, a thermal oxidation aging resistant agent and a lubricant;
relative to 100 parts by weight of a mixture of starch and a PVA carrier, the content of the small-molecule plasticizer is 10-55 parts by weight, the content of the large-molecule plasticizer is 1-10 parts by weight, the content of the thermal decomposition inhibitor is 1-8 parts by weight, the content of the thermal oxidation aging resistant agent is 0.5-6 parts by weight, and the content of the lubricant is 0.5-6 parts by weight.
By optimizing the components and the proportion of the starch master batch composition for PVA thermoplastic processing, the addition amounts of a small molecular plasticizer and a large molecular plasticizer are increased, the addition amounts of a thermal decomposition inhibitor, an anti-thermal oxidation aging agent and the like are increased, the melting point of the starch master batch composition for PVA thermoplastic processing is reduced, and the granulation processing temperature is reduced.
In order to further reduce the granulation processing temperature, preferably, the content of the small molecule plasticizer is 25 to 55 parts by weight, the content of the large molecule plasticizer is 2 to 10 parts by weight, the content of the thermal decomposition inhibitor is 3 to 5 parts by weight, the content of the thermal aging resistant agent is 1 to 4 parts by weight, and the content of the lubricant is 1 to 4 parts by weight, relative to 100 parts by weight of the mixture of the PVA carrier and the starch.
In order to further reduce the cost, the content of the starch in the starch master batch for thermoplastic processing of PVA is improved on the premise of ensuring the thermoplastic processing and performance. Preferably, the content of the starch in the mixture of the PVA carrier and the starch is more than or equal to 60 parts by weight.
The starch is not particularly limited, and may be any of various commercially available starches, and those skilled in the art can determine the starch according to actual use requirements. In the present invention, preferably, the starch is one or more of corn starch, potato starch, tapioca starch, wheat starch, sorghum starch and mixed bean starch.
The raw materials of the PVA carrier are not particularly specified, and various kinds of PVA which can be obtained on the market can be used, for example, partial alcoholysis type PVA which is specified by the most widely used naming mode in the domestic industry-GB 12010.1-89 at present, and other naming modes on the market, such as the naming mode which is specified by GBT12010.1-2008 and the naming mode which is not used domestically, can be converted into the naming mode which is specified by GB12010.1-89 according to corresponding technical indexes.
In the present invention, it is preferable that the degree of polymerization of PVA is 300-2600.
Preferably, the PVA is partial alcoholysis type PVA, the alcoholysis degree is 88%, and the grade of the PVA is one or more of 0388, 0588, 1788, 2088, 2288, 2488 and 2688 specified in GB 12010.1-89.
More preferably, the PVA is one or more of grade 0588, 1788, 2088, 2288, 2488.
In the invention, the plasticizer is divided into two parts, namely a micromolecular plasticizer and a macromolecular plasticizer, which are mainly distinguished by different molecular weights and polymerization degrees, wherein the micromolecular plasticizer is used for reducing the melting point by reducing the space between the starch and PVA molecules; the macromolecular plasticizer also has the same function, and simultaneously, the macromolecular plasticizer can improve the compatibility between starch molecules and PVA molecules.
The small molecule plasticizer is not particularly limited, and may be various small molecule plasticizers commonly used in the art, and may be determined by those skilled in the art according to the actual use requirement, and may be, for example, a small molecule polyol, a polyol ether, a fatty acid amine or a fatty alcohol amine, and the like. In the present invention, preferably, the small molecule plasticizer is one or more of glycerin, diglycerin, triglycerol, decaglycerol, sorbitol, mannitol, diethanolamine, triethanolamine, and diethylene glycol.
The macromolecular plasticizer is not particularly limited, and may be various macromolecular plasticizers commonly used in the art, and those skilled in the art can determine the macromolecular plasticizer according to the actual use requirement, and for example, the macromolecular plasticizer may be polyether polyol having a relatively large molecular weight, polyester-based macromolecular compound, or the like. In the present invention, preferably, the macromolecular plasticizer is PEG-3000, PEG-4000, PEG-6000, PEG-8000, PEO, PBAT, PLA or PBS.
The thermal decomposition inhibitor is not particularly limited, and may be various thermal decomposition inhibitors or stabilizers commonly used in the art, in order to further ensure that the starch and PVA carrier are not decomposed and carbonized during the twin-screw granulation process, to inhibit the decomposition of starch, and to provide a certain internal and external lubrication. In the present invention, preferably, the thermal decomposition inhibitor is one or more of sorbitan stearate, myristic acid, epoxybutyl stearate, organotin stabilizer, rare earth stabilizer, epoxidized soybean oil, and magnesium hydroxide.
The antioxidant is not particularly limited, and may be various single-component antioxidants or antioxidants commonly used in the art, and in order to further ensure that the starch and PVA carriers eliminate generated free radicals, promote decomposition of hydroperoxides, prevent chain reactions, and retard or inhibit polymer oxidation processes during twin-screw granulation and particle storage and use, in the present invention, preferably, the antioxidant is two or more of antioxidants 697, 1024, 1076, 1098, 1010, 626, 168, DLTP, and DSTP.
The above lubricant is not particularly limited, and in the present invention, it is preferable that the lubricant is one or more of liquid paraffin, polyethylene wax, oxidized polyethylene wax, hardened oil, triglycerol monostearate, and pentaerythritol stearate.
In a second aspect, the present invention provides a method for preparing starch masterbatch for PVA thermoplastic processing, the method comprising:
and mixing, granulating and forming the starch master batch composition for PVA thermoplastic processing.
In the method of the present invention, the preparation method of the starch masterbatch for PVA thermoplastic processing is not particularly limited, and may be various preparation methods conventionally adopted by those skilled in the art, and will not be described herein again. In a specific embodiment of the invention, the preparation is carried out according to the following steps:
(1) stirring all the compositions in a high-speed mixer for 5 to 20 minutes at high temperature;
(2) and extruding and granulating by using a parallel double-screw granulator set to obtain the starch master batch for PVA thermoplastic processing.
In the specific embodiment of the invention, the temperature of each section of the double-screw granulator unit is 45-160 ℃, and the screw rotating speed is 200-450 rpm.
In a third aspect, the present invention provides a PVA thermoplastic processing starch concentrate prepared by the above method.
In the method of the present invention, the moisture content of the PVA starch masterbatch for thermoplastic processing is preferably 0.1-0.3 wt%, based on the practical considerations of the PVA starch masterbatch production equipment for thermoplastic processing, and the convenience and feasibility analysis of the subsequent use.
For the feasibility of the PVA thermoplastic processing starch master batch in the subsequent use process, the PVA thermoplastic processing starch master batch has a melt flow rate of 0.1-1g/10min under the load of 2.16kg and at 220 ℃.
The present invention will be described in detail below with reference to examples, but the present invention is not limited to the following examples.
All the starting materials used in the examples are commercially available, except where otherwise indicated.
Performance evaluation method:
and (3) testing the moisture content of the prepared modified particles in the starch masterbatch for PVA thermoplastic processing according to the national standard GB/T6284-2006, and testing the melt flow rate of the modified particles according to the national standard GB 3682-2000.
Example 1
A starch concentrate composition for thermoplastic processing of PVA comprising:
65 parts of cassava starch, 178835 parts of PVA, 25 parts of sorbitol, 2 parts of PEG-30003 parts of organic tin thermal decomposition inhibitor, 2 parts of epoxidized soybean oil, 10101 parts of antioxidant, 2 parts of DSTP and 2 parts of hardened oil.
Example 2
A starch concentrate composition for thermoplastic processing of PVA comprising:
70 parts of potato starch, 208830 parts of PVA, 15 parts of mannitol, 40 parts of glycerol, 5 parts of PEO, 2 parts of rare earth stabilizer, 1 part of sorbitan stearate, 6973 parts of antioxidant, 1680.5 part of trimeric glycerol monostearate and 1.5 parts of trimeric glycerol monostearate.
Example 3
A starch concentrate composition for thermoplastic processing of PVA comprising:
65 parts of sorghum starch, 26885 parts of PVA, 058830 parts of PVA, 15 parts of diglycerol, 20 parts of sorbitol, 01 parts of PEG-400, 3 parts of PBAT, 1 part of rare earth stabilizer, 1 part of magnesium hydroxide, 10981.5 parts of antioxidant, 2 parts of DLTP and 1 part of polyethylene wax.
Example 4
A starch concentrate composition for thermoplastic processing of PVA comprising:
60 parts of mixed bean starch, 60 parts of PVA178815 parts of PVA038825 parts of decaglycerol, 10 parts of mannitol, 2 parts of PEG-80002 parts of epoxidized soybean oil, 6972 parts of antioxidant, 6261 parts of magnesium hydroxide and 4 parts of pentaerythritol stearate.
Example 5
A starch concentrate composition for thermoplastic processing of PVA comprising:
25 parts of potato starch, 40 parts of sorghum starch, 208825 parts of PVA, 058810 parts of PVA, 20 parts of triglycerol, 15 parts of diethanolamine, PEG-60004 parts of epoxidized soybean oil, 2 parts of epoxidized butyl stearate, 10242 parts of antioxidant, 1681 part of hardened oil and 1.5 parts of unsaturated polyester polyol.
Example 6
A starch concentrate composition for thermoplastic processing of PVA comprising:
75 parts of cassava starch, 0 part of PVA228810 part, 5 parts of PVA178815 parts of diethanolamine, 25 parts of triethanolamine, 10 parts of PLA, 2 parts of myristic acid, 1 part of epoxy butyl stearate, 10243 parts of antioxidant, 6261 parts of oxidized polyethylene wax and 1.5 parts of oxidized polyethylene wax.
Example 7
A starch concentrate composition for thermoplastic processing of PVA comprising:
70 parts of wheat starch, 248810 part of PVA, 178820 parts of PVA, 15 parts of triethanolamine, 30 parts of diethylene glycol, 8 parts of PBS, 1 part of magnesium hydroxide, 2 parts of epoxy butyl stearate, 10760.5 parts of antioxidant, 1 parts of DLTP and 1 part of liquid paraffin.
Example 8
A starch concentrate composition for thermoplastic processing of PVA comprising:
75 parts of corn starch, 24885 parts of PVA, 058820 parts of PVA, 10 parts of sorbitol, 15 parts of triglycerol, 15 parts of diethanolamine, 15 parts of PEG-40006 parts of epoxy butyl stearate, 2 parts of magnesium hydroxide, 10980.5 parts of antioxidant, 1680.5 part of antioxidant and 1 part of liquid paraffin.
Example 9
A starch concentrate composition for thermoplastic processing of PVA comprising:
65 parts of cassava starch, 25 parts of PVA268825, 20 parts of PVA228820, 15 parts of mannitol, 10 parts of diglycerol, 6 parts of PBAT, 3 parts of myristic acid, 6981.5 parts of antioxidant, 1680.5 part and 1 part of polyethylene wax.
Example 10
A starch concentrate composition for thermoplastic processing of PVA comprising:
40 parts of corn starch, 30 parts of mixed bean starch, 248830 parts of PVA, 25 parts of glycerol, 15 parts of decaglycerol, 2 parts of PLA, 1 part of sorbitan stearate, 1 part of epoxy butyl stearate, 6981.5 parts of antioxidant, 10241 parts of antioxidant, 0.5 part of DLTP and 1.5 parts of oxidized polyethylene wax.
Comparative example 1
A starch concentrate composition for thermoplastic processing of PVA comprising:
65 parts of cassava starch, 178835 parts of PVA, 8 parts of sorbitol, 25 parts of PEG-30000.5 parts of organic tin stabilizer, 5 parts of epoxidized soybean oil, 10104 parts of antioxidant, 3 parts of DSTP and 7 parts of hardened oil.
Comparative example 2
A starch concentrate composition for thermoplastic processing of PVA comprising:
65 parts of cassava starch, 178835 parts of PVA, 25 parts of sorbitol, 2 parts of organic tin stabilizer, 2 parts of epoxidized soybean oil, 10101 parts of antioxidant, 2 parts of DSTP and 2 parts of hardened oil.
The above examples 1 to 10 and comparative examples 1 and 2 were prepared according to the following procedure:
(1) all the components are stirred for 15 minutes at high temperature in a high-speed mixer;
(2) extruding and granulating by using a parallel double-screw granulator set to obtain starch master batches for PVA thermoplastic processing; wherein, the temperature of each section of the double-screw granulator set is as follows: first zone 60 deg.C, second zone 80 deg.C, third zone 110 deg.C, fourth zone 125 deg.C, fifth zone 130 deg.C, sixth zone 140 deg.C, seventh zone 150 deg.C, eighth zone 150 deg.C, ninth zone 155 deg.C, tenth zone 155 deg.C, eleventh zone 150 deg.C, twelfth zone 150 deg.C, thirteenth zone 145 deg.C, and head 145 deg.C; setting the rotating speed of the screw to 320 rpm;
the above PVA starch concentrates for thermoplastic processing S1-S10 and D1 and D2 were tested and the results are shown in Table 1 below.
TABLE 1
As is clear from Table 1, the starch master batch for thermoplastic processing of PVA of the present invention has a relatively low moisture content, and examples S1 to S10 are in a stable range, and do not affect the thermoplastic processing of PVA and do not generate blisters. Comparative example D1, which has a slightly higher moisture content, may exhibit blistering and air leakage during the blown film process.
The melt flow rate of the embodiments S1-S10 is 0.2-1g/10min, and the PVA powder can be used as filling starch masterbatch during PVA granulation, and does not influence the granulation and blow molding of PVA to form films. Comparative example 1 has a low melt flow rate, greatly differing from S1-S10, and starch is decomposed during granulation, which is not suitable for blown film processing. The difference between the comparative example 2 and the example 1 is that no macromolecular plasticizer is added, the melt flow rate of the macromolecular plasticizer is less than that of the example 1, which shows that the macromolecular plasticizer obviously improves the melt flow rate and is more favorable for being used as filling starch masterbatch in PVA granulation.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (13)
1. A PVA starch masterbatch composition for thermoplastic processing, which is characterized by comprising: starch, a PVA carrier, a micromolecular plasticizer, a macromolecular plasticizer, a thermal decomposition inhibitor, a thermal oxidation resistant aging agent and a lubricant;
relative to 100 parts by weight of a mixture of starch and a PVA carrier, the content of the small-molecule plasticizer is 10-55 parts by weight, the content of the large-molecule plasticizer is 1-10 parts by weight, the content of the thermal decomposition inhibitor is 1-8 parts by weight, the content of the thermal oxidation aging resistant agent is 0.5-6 parts by weight, and the content of the lubricant is 0.5-6 parts by weight.
2. The PVA starch masterbatch composition for thermoplastic processing according to claim 1, wherein the small molecule plasticizer is contained in an amount of 25 to 55 parts by weight, the large molecule plasticizer is contained in an amount of 2 to 10 parts by weight, the thermal decomposition inhibitor is contained in an amount of 3 to 5 parts by weight, the thermal aging inhibitor is contained in an amount of 1 to 4 parts by weight, and the lubricant is contained in an amount of 1 to 4 parts by weight, based on 100 parts by weight of the mixture of the PVA carrier and the starch.
3. The PVA starch masterbatch composition for thermoplastic processing according to claim 1, wherein the starch content of the PVA starch masterbatch composition for thermoplastic processing is not less than 60 parts by weight.
4. The PVA starch concentrate composition for thermoplastic processing according to any one of claims 1 to 3, wherein the starch is one or more of corn starch, potato starch, tapioca starch, wheat starch, sorghum starch and mixed bean starch.
5. The PVA starch masterbatch composition for thermoplastic processing according to any one of claims 1 to 3, wherein the degree of polymerization of the PVA is 300-2600;
preferably, the alcoholysis degree of the PVA is more than or equal to 88 percent;
more preferably, PVA is one or more of grades 0588, 1788, 2088, 2288, and 2488.
6. The PVA starch masterbatch composition for thermoplastic processing according to any one of claims 1 to 3, wherein the small molecule plasticizer is one or more of glycerin, diglycerin, triglycerin, decaglycerol, sorbitol, mannitol, diethanolamine, triethanolamine and diethylene glycol.
7. The PVA starch masterbatch composition for thermoplastic processing according to any one of claims 1 to 3, wherein the macromolecular plasticizer is PEG-3000, PEG-4000, PEG-6000, PEG-8000, PEO, PBAT, PLA or PBS.
8. The PVA starch masterbatch composition for thermoplastic processing according to any one of claims 1 to 3, wherein the thermal decomposition inhibitor is one or more of sorbitan stearate, myristic acid, butyl epoxystearate, organotin stabilizer, rare earth stabilizer, epoxidized soybean oil and magnesium hydroxide.
9. The PVA starch masterbatch composition for thermoplastic processing according to any one of claims 1 to 3, wherein the antioxidant is two or more of antioxidants 697, 1024, 1076, 1098, 1010, 626, 168, DLTP and DSTP.
10. The PVA starch masterbatch composition for thermoplastic processing according to any one of claims 1 to 3, wherein the lubricant is one or more of liquid paraffin, polyethylene wax, oxidized polyethylene wax, hardened oil, triglycerol monostearate and pentaerythritol stearate.
11. A preparation method of starch master batch for PVA thermoplastic processing is characterized by comprising the following steps:
a step of mixing, granulating and molding the PVA thermoplastic processing starch masterbatch composition according to any one of claims 1 to 10.
12. A PVA thermoplastic processing starch concentrate made by the method of claim 11.
13. The PVA starch masterbatch for thermoplastic processing according to claim 12, wherein the PVA starch masterbatch for thermoplastic processing has a water content of 0.1 to 0.3 wt%;
preferably, the PVA starch masterbatch for thermoplastic processing has a melt flow rate of 0.1-1g/10min under a load of 2.16kg and at 220 ℃.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114276584A (en) * | 2021-12-08 | 2022-04-05 | 中广核俊尔(浙江)新材料有限公司 | Starch masterbatch capable of completely biodegrading film and preparation method thereof |
| CN115785595A (en) * | 2022-11-28 | 2023-03-14 | 河源市普立隆新材料科技有限公司 | Polyvinyl alcohol melt blown film based on anhydrous plasticization and preparation method thereof |
-
2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114276584A (en) * | 2021-12-08 | 2022-04-05 | 中广核俊尔(浙江)新材料有限公司 | Starch masterbatch capable of completely biodegrading film and preparation method thereof |
| CN115785595A (en) * | 2022-11-28 | 2023-03-14 | 河源市普立隆新材料科技有限公司 | Polyvinyl alcohol melt blown film based on anhydrous plasticization and preparation method thereof |
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Application publication date: 20200612 |