Plastic compositions, plasticizers and plastic products

Abstract

The present invention provides a plastic composition, comprising at least one plastic and at least one plasticizer. The plastic comprises polylactic acid, the plasticizer comprises an amide ester compound, and the amide ester compound has biodegradability. The weight percentage of the plastic in the plastic composition is 85% to 99.99%, and the weight percentage of the plasticizer in the plastic composition is 0.01% to 15%. Thus, the plastic composition of the present invention can reduce damage to the environment and ecology by the biodegradable polylactic acid and the plasticizer characteristics, and has excellent biodegradability and good plasticizing effect by the specific mixing ratio. Furthermore, by designing the plasticizer structure similar to the estrogen, the plasticizer can prevent affecting normal physiological functions.

Description

Technical Field

[0001] This invention relates to a plastic composition, plasticizer, and plastic product, and particularly to a biodegradable plastic composition, plasticizer, and plastic product. Background Technology

[0002] Plasticizers are materials used to increase the plasticity of products, commonly used in plastic products such as plastic bags. Currently, the most commonly used traditional plasticizers are phthalate compounds, such as DEHP, DBP, DINP, BBP, and DIDP. Plasticizers have structures similar to estrogen, which can easily cause developmental abnormalities in adolescents and may even increase the incidence of breast and ovarian cancer. Most of the traditional plasticizers mentioned above have a molecular weight of less than 500 g / mole, and those with smaller molecular weights are relatively easier for the human body to absorb. Because plasticizers are bound to other substances in plastic products through non-chemical bonds, they are easily released from the plastic products, and therefore can be absorbed by the human body through contact with food or skin.

[0003] In recent years, with rising environmental awareness, it has become increasingly clear that traditional plastic products, if not properly disposed of, can damage the environment and ecosystem. This has led to the widespread promotion of biodegradable products, although the decomposition rate is often low. Most plasticizers and plastics remain non-degradable, and users mistakenly believe that these products, due to their biodegradability, can be disposed of arbitrarily without impacting the environment and ecosystem. This results in the improper handling of these plastic products, further exacerbating environmental and ecological damage. Since plastic products are now an indispensable part of human life, it is crucial to find plasticizers that are not easily released from plastic products or absorbed by the human body, and to develop biodegradable plastic products. Summary of the Invention

[0004] This invention provides a plastic composition comprising polylactic acid (PLA) and a plasticizer. This plasticizer does not contain the phthalic acid structure found in traditional plasticizers, and by designing a plasticizer structure dissimilar to estrogen, it can prevent the plasticizer from affecting normal physiological functions. By designing a plasticizer without a benzene ring structure, it can have better safety in preventing the plasticizer from affecting normal physiological functions. By designing a plasticizer with a specific molecular weight, it is less likely to be absorbed by the human body, thus exhibiting excellent safety. Since both PLA and the plasticizer are biodegradable, environmental and ecological damage can be reduced, and through a specific mixing ratio, it exhibits excellent biodegradability and produces a good plasticizing effect.

[0005] According to the present invention, a plastic composition is provided, comprising at least one plastic and at least one plasticizer. The plastic comprises polylactic acid, and the plasticizer comprises an amide ester compound, wherein the amide ester compound is biodegradable. The plastic constitutes 85% to 99.99% of the plastic composition by weight, and the plasticizer constitutes 0.01% to 15% of the plastic composition by weight.

[0006] According to the present invention, a plastic product is provided, comprising the plastic composition as described above.

[0007] Therefore, the plastic compositions and plastic products of the present invention, through the biodegradable polylactic acid and plasticizer properties, can reduce environmental and ecological damage, and through specific mixing ratios, they can achieve excellent biodegradability and produce good plasticizing effects. Furthermore, by designing plasticizer structures that are dissimilar to estrogen, it is possible to prevent plasticizers from affecting normal physiological functions.

[0008] According to the present invention, a plastic composition is provided, comprising at least one plastic and at least one plasticizer. The plasticizer is biodegradable and has a structure as shown in formula (I):

[0009]

[0010] Where X is the central structure, Y is the first long chain structure, and Z is the second long chain structure, and the number of carbon atoms in X is XC, the number of carbon atoms in Y is YC, and the number of carbon atoms in Z is ZC, which satisfy the following conditions: 1 ≤ XC ≤ 6; 14 ≤ YC ≤ 25; and 14 ≤ ZC ≤ 25.

[0011] According to the present invention, a plastic product is provided, comprising the plastic composition as described above.

[0012] Therefore, the plastic compositions and plastic products of the present invention, by designing plasticizers without benzene ring structures, can have better safety to prevent plasticizers from affecting normal physiological functions.

[0013] According to the present invention, a plasticizer is provided that is biodegradable and has a structure as shown in formula (I):

[0014]

[0015] Wherein, X is the central structure, Y is the first long chain structure, and Z is the second long chain structure. X has XC carbon atoms, Y has YC carbon atoms, and Z has ZC carbon atoms, satisfying the following conditions: 1 ≤ XC ≤ 6; 14 ≤ YC ≤ 25; and 14 ≤ ZC ≤ 25. The decomposition rate on day 7 is Dr7, and the decomposition rate of the plasticizer on day 7 satisfies the following condition: 20% ≤ Dr7.

[0016] According to the present invention, a plastic product is provided, comprising the plasticizer as described above.

[0017] Therefore, the plasticizer and plastic products of the present invention, by designing a plasticizer structure that is dissimilar to estrogen, can prevent plasticizer from affecting normal physiological functions, and by satisfying the decomposition rate of plasticizer on day 7, it helps to improve the short-term decomposition rate of plasticizer. Attached Figure Description

[0018] To make the above and other objects, features, advantages and embodiments of the present invention more apparent and understandable, the accompanying drawings are described below:

[0019] Figure 1 This is a graph showing the relationship between the decomposition rate and the number of days for the plastic composition of the first comparative example;

[0020] Figure 2 This is a graph showing the relationship between the decomposition rate and the number of days for the plastic composition of the second comparative example;

[0021] Figure 3 This is a graph showing the relationship between the decomposition rate and the number of days for the plastic composition of the third comparative example;

[0022] Figure 4 It is a graph showing the relationship between the decomposition rate and the number of days of the plastic composition of the first embodiment; and

[0023] Figure 5 This is a graph showing the relationship between the decomposition rate and the number of days of the plastic composition of the second embodiment;

[0024] The symbols are explained as follows:

[0025] O: Oxygen atom; C: Carbon atom

[0026] N: Nitrogen atom X: Central structure

[0027] XC: Number of carbon atoms in the central structure; Y: First long chain structure.

[0028] YC: Number of carbon atoms in the first long-chain structure; Z: Second long-chain structure.

[0029] ZC: Number of carbon atoms in the second longest chain structure; Pt: Decomposition temperature of the plasticizer.

[0030] Mw: Molecular weight of plasticizer; Dr7: Decomposition rate on day 7.

[0031] Dr14: Decomposition rate on day 14; Dr21: Decomposition rate on day 21

[0032] Dr28: Decomposition rate on day 28; Dr42: Decomposition rate on day 42. Detailed Implementation

[0033] One embodiment of the present invention provides a plastic composition comprising at least one plastic and at least one plasticizer. The plastic comprises polylactic acid, and the plasticizer comprises an amide ester compound, wherein the amide ester compound is biodegradable. Thus, the biodegradable polylactic acid and the plasticizer's properties reduce environmental and ecological damage. Furthermore, by designing a plasticizer structure dissimilar to estrogen, the plasticizer can prevent it from affecting normal physiological functions.

[0034] Another embodiment of the present invention provides a plastic composition comprising at least one plastic and at least one plasticizer. The plasticizer is biodegradable and has a structure as shown in formula (I):

[0035]

[0036] In this design, X is the central structure, Y is the first long-chain structure, and Z is the second long-chain structure. Therefore, by designing plasticizers without a benzene ring structure, better safety can be achieved to prevent plasticizers from affecting normal physiological functions. Furthermore, by designing plasticizer structures that are dissimilar to estrogen, it is possible to prevent plasticizers from affecting normal physiological functions.

[0037] According to the plasticizer of the present invention, in formula (I), the number of carbon atoms of X is XC, the number of carbon atoms of Y is YC, and the number of carbon atoms of Z is ZC, which satisfies the following conditions: 1 ≤ XC ≤ 6; 14 ≤ YC ≤ 25; and 14 ≤ ZC ≤ 25. Thus, by designing a plasticizer that is dissimilar to estrogen and does not have a benzene ring structure, the plasticizer can prevent it from affecting normal physiological function. Alternatively, it can satisfy the following conditions: 2 ≤ XC ≤ 5; 14 ≤ YC ≤ 24; and 14 ≤ ZC ≤ 24. Alternatively, it can satisfy the following conditions: 2 ≤ XC ≤ 4; 14 ≤ YC ≤ 23; and 14 ≤ ZC ≤ 23. Alternatively, it can satisfy the following conditions: 2 ≤ XC ≤ 3; 14 ≤ YC ≤ 22; and 14 ≤ ZC ≤ 22. Alternatively, it may satisfy the following conditions: 15 ≤ YC ≤ 21; and 15 ≤ ZC ≤ 21. Alternatively, it may satisfy the following conditions: 16 ≤ YC ≤ 20; and 16 ≤ ZC ≤ 20. Alternatively, it may satisfy the following conditions: 17 ≤ YC ≤ 19; and 17 ≤ ZC ≤ 19.

[0038] According to the plasticizer of the present invention, the decomposition rate on day 7 is Dr7, and the decomposition rate of the plasticizer on day 7 satisfies the following condition: 20% ≤ Dr7. Therefore, by satisfying the decomposition rate of the plasticizer on day 7, it is helpful to improve the short-term decomposition rate of the plasticizer. Alternatively, it may satisfy the following condition: 30% ≤ Dr7. Alternatively, it may satisfy the following condition: 40% ≤ Dr7. Alternatively, it may satisfy the following condition: 50% ≤ Dr7. Alternatively, it may satisfy the following condition: 60% ≤ Dr7. Alternatively, it may satisfy the following condition: 65% ≤ Dr7 ≤ 100%.

[0039] According to the plastic composition of the present invention, the plastic comprises 85% to 99.99% by weight and the plasticizer comprises 0.01% to 15% by weight. Thus, through a specific mixing ratio, the plastic composition exhibits excellent biodegradability and produces a good plasticizing effect. Alternatively, the plastic comprises 87.5% to 99.99% by weight and the plasticizer comprises 0.01% to 12.5% ​​by weight. Alternatively, the plastic comprises 90% to 99.99% by weight and the plasticizer comprises 0.01% to 10% by weight. Alternatively, the plastic comprises 92.5% to 99.99% by weight and the plasticizer comprises 0.01% to 7.5% by weight. Alternatively, the plastic comprises 95% to 99.99% by weight and the plasticizer comprises 0.01% to 5% by weight.

[0040] According to the plastic composition of the present invention, the decomposition rate on day 14 is Dr14, and the decomposition rate of the plastic composition on day 14 satisfies the following condition: 1% ≤ Dr14. Therefore, by satisfying the decomposition rate of the plastic composition on day 14, it is helpful to improve the initial decomposition rate of the plastic composition. Alternatively, it may satisfy the following condition: 2.5% ≤ Dr14. Alternatively, it may satisfy the following condition: 5% ≤ Dr14. Alternatively, it may satisfy the following condition: 7.5% ≤ Dr14. Alternatively, it may satisfy the following condition: 8% ≤ Dr14. Alternatively, it may satisfy the following condition: 9% ≤ Dr14 ≤ 100%.

[0041] According to the plastic composition of the present invention, the decomposition rate on day 21 is Dr21, and the decomposition rate of the plastic composition on day 21 satisfies the following condition: 6% ≤ Dr21. Therefore, by satisfying the decomposition rate of the plastic composition on day 21, it is helpful to improve the very short-term decomposition rate of the plastic composition. Alternatively, it may satisfy the following condition: 10% ≤ Dr21. Alternatively, it may satisfy the following condition: 12.5% ​​≤ Dr21. Alternatively, it may satisfy the following condition: 15% ≤ Dr21. Alternatively, it may satisfy the following condition: 17.5% ≤ Dr21. Alternatively, it may satisfy the following condition: 20% ≤ Dr21. Alternatively, it may satisfy the following condition: 24% ≤ Dr21 ≤ 100%.

[0042] According to the plastic composition of the present invention, the decomposition rate on day 28 is Dr28, and the decomposition rate of the plastic composition on day 28 satisfies the following condition: 15% ≤ Dr28. Therefore, by satisfying the decomposition rate of the plastic composition on day 28, it is helpful to improve the short-term decomposition rate of the plastic composition. Alternatively, it may satisfy the following condition: 20% ≤ Dr28. Alternatively, it may satisfy the following condition: 25% ≤ Dr28. Alternatively, it may satisfy the following condition: 30% ≤ Dr28. Alternatively, it may satisfy the following condition: 35% ≤ Dr28 ≤ 100%.

[0043] According to the plastic composition of the present invention, the decomposition rate on day 42 is Dr42, and the decomposition rate of the plastic composition on day 42 satisfies the following condition: 20% ≤ Dr42. Therefore, by satisfying the decomposition rate of the plastic composition on day 42, it is helpful to improve the intermediate decomposition rate of the plastic composition. Alternatively, it may satisfy the following condition: 25% ≤ Dr42. Alternatively, it may satisfy the following condition: 30% ≤ Dr42. Alternatively, it may satisfy the following condition: 35% ≤ Dr42. Alternatively, it may satisfy the following condition: 40% ≤ Dr42. Alternatively, it may satisfy the following condition: 45% ≤ Dr42.

[0044] The plastic composition according to the present invention further comprises at least one non-biodegradable plastic, wherein the weight percentage of the non-biodegradable plastic is less than the weight percentage of polylactic acid. Therefore, by including the non-biodegradable plastic in the plastic composition, the molding of the plastic composition is facilitated and the stability of the structure is improved. Furthermore, by ensuring that the weight percentage of the non-biodegradable plastic is less than the weight percentage of polylactic acid, a good decomposition rate of the plastic composition can be guaranteed.

[0045] According to the plasticizer of the present invention, the molecular weight of the plasticizer is Mw, which satisfies the following condition: 500 g / mole ≤ Mw. Therefore, by designing a plasticizer with a specific molecular weight, the plasticizer is not easily absorbed by the human body, and thus has excellent safety. Alternatively, it can satisfy the following conditions: 510 g / mole ≤ Mw ≤ 1000 g / mole. Alternatively, it can satisfy the following conditions: 520 g / mole ≤ Mw ≤ 900 g / mole. Alternatively, it can satisfy the following conditions: 530 g / mole ≤ Mw ≤ 800 g / mole. Alternatively, it can satisfy the following conditions: 540 g / mole ≤ Mw ≤ 700 g / mole. Alternatively, it can satisfy the following conditions: 550 g / mole ≤ Mw ≤ 600 g / mole. Alternatively, it can satisfy the following conditions: 580 g / mole ≤ Mw ≤ 590 g / mole.

[0046] According to the plasticizer of the present invention, X, Y, and Z in formula (I) are all linear chains. Therefore, by virtue of the higher boiling point of linear molecules compared to branched molecules, the plasticizer can be prevented from vaporizing at high temperatures and being inhaled by the human body.

[0047] According to the plasticizer of the present invention, Y and Z in formula (I) have at least one double bond. Therefore, by having at least one double bond in the structure of Y and Z, the decomposition efficiency of the plasticizer is improved.

[0048] According to the plasticizer of the present invention, the decomposition temperature of the plasticizer is Pt, which satisfies the following condition: 100 o C ≤ Pt ≤ 300 o C. Therefore, the high decomposition temperature of plasticizers contributes to their structural stability at high temperatures. Alternatively, it can satisfy the following condition: 125 o C ≤ Pt ≤ 300 o C. Alternatively, it can satisfy the following condition: 150 o C ≤ Pt ≤ 300 o C. Alternatively, it can satisfy the following condition: 150 o C ≤ Pt ≤ 280 o C. Alternatively, it can satisfy the following condition: 180 o C ≤ Pt ≤ 280 o C. Alternatively, it can satisfy the following condition: 200 o C ≤ Pt ≤ 280 o C. Alternatively, it can satisfy the following condition: 200 o C ≤ Pt ≤ 260 o C.

[0049] According to the plasticizer of the present invention, the decomposition rate on day 21 is Dr21, and the decomposition rate of the plasticizer on day 21 satisfies the following condition: 65% ≤ Dr21. Therefore, by satisfying the decomposition rate of the plasticizer on day 21, it is helpful to improve the intermediate decomposition rate of the plasticizer. Alternatively, it may satisfy the following condition: 70% ≤ Dr21. Alternatively, it may satisfy the following condition: 75% ≤ Dr21. Alternatively, it may satisfy the following condition: 80% ≤ Dr21. Alternatively, it may satisfy the following condition: 85% ≤ Dr21 ≤ 100%.

[0050] The plastic composition of the present invention may contain biodegradable plasticizers and biodegradable plastics, and non-biodegradable plasticizers and non-biodegradable plastics may be added as needed to achieve a balance between functionality and biodegradability.

[0051] The plastic composition of the present invention may contain at least one additive, such as: stabilizer, lubricant, antistatic agent, flame retardant, colorant, filler, antistatic agent, light stabilizer, foaming agent, coupling agent, and toughening agent; wherein the stabilizer may be calcium stearate, the lubricant may be fatty acid, the flame retardant may be antimony trioxide, the colorant may be antimony dioxide, the filler may be calcium carbonate, glass fiber, asbestos fiber, carbon fiber, boron fiber, copper disulfide, mica, asbestos, silica, silicate, calcium carbonate, metal oxide, carbon black, glass beads, or wood flour, the antistatic agent may be stearamide propyl dimethyl-B-hydroxyethylamine nitrate, the light stabilizer may be salicylates, benzophenones, benzotriazoles, substituted propylenes, trimethylolpropionic acid compounds, or organic complexes, and the foaming agent may be azodicarbonamide. Therefore, the properties of plastics can be modified to change their impact resistance, weather resistance, heat resistance, flowability, elasticity, corrosion resistance, deformation resistance, light transmittance, creep resistance, antistatic properties, photolysis resistance, specific gravity, or toughness.

[0052] The plastic in the plastic composition of the present invention, wherein the biodegradable plastic may be polylactic acid (PLA), or may be starch, butylene adipate-butylene terephthalate copolymer (PBAT), polybutylene succinate (PBS), polypropylene carbonate (PPC), polyhydroxyalkanoates (PHA), polycaprolactone (PCL), polyvinyl alcohol (PVA), polyglycolic acid (PGA), polyglycerol sebacate (PGS), polyhydroxybutyrate (PHB), or copolymers formed from the above polymer monomers.

[0053] The plastic in the plastic composition of the present invention, wherein the non-biodegradable plastic may be polyethylene terephthalate (PET), high-density polyethylene (HDPE), polyvinyl chloride (PVC), low-density polyethylene (LDPE), polypropylene (PP), polystyrene (PS), polycarbonate (PC), polymethyl methacrylate (PMMA), acrylonitrile butadiene styrene copolymer (ABS), cyclic olefin copolymer (COC), or melamine resin, or a mixture of the above plastics.

[0054] The plasticizers described in this invention, with a larger molecular weight, refer to plasticizers with a molecular weight greater than 500 g / mole. They are not limited by plastic materials and can plasticize different biodegradable plastics, thus having wider applicability and convenience.

[0055] The plasticizer described in this invention may be an amide ester compound, which refers to an amide compound having an ester group.

[0056] The plasticizer of the present invention, wherein the structures of X, Y and Z of formula (I) have carbon atoms, and may also have at least one of sulfur atoms, oxygen atoms and nitrogen atoms; wherein the structures of X, Y and Z have carbon-carbon single bonds, and may also have at least one of carbon-carbon double bonds, carbon-carbon triple bonds, carbon-oxygen bonds, carbon-nitrogen bonds, disulfide bonds, sulfur-oxygen bonds, sulfur-carbon bonds, sulfur-nitrogen bonds, dinitrogen bonds, nitrogen-oxygen bonds and dioxygen bonds; wherein the structures of X, Y and Z have alkyl groups, and may also have at least one of alkenyl, alkynyl, hydroxyl, carbonyl, aldehyde, carbonate, carboxyl, ether, ester, amide, primary amine, secondary amine, tertiary amine, ketimino and aldehyde imino groups. Where XC, YC, and ZC can be 2, 17, and 17 respectively, then the plasticizer is 2-[(9Z)-9-octadecenoylamino]ethyl(9Z)-9-octadecenoyl ester; where XC, YC, and ZC can be 1, 14, and 14 respectively, then the plasticizer is 2-[(9Z)-9-pentadecanenoylamino]methyl(9Z)-9-pentadecanenoyl ester; where XC, YC, and ZC can also be 6, 25, and 25 respectively, then the plasticizer is 2-[(9Z)-9-hexadecenoylamino]hexyl(9Z)-9-hexadecenoyl ester; where the double bond position can also be on the 10th carbon of both Y and Z, then the plasticizer is 2-[(10Z)-10-hexadecenoylamino]hexyl(10Z)-10-hexadecenoyl ester.

[0057] The decomposition rate described in this invention is determined using ASTM-D5338 as the standard method. The decomposition percentage is calculated by weight. The degradation products are mixed with activated sludge (fertilizer) at a weight ratio of 1:6, and perlite is used to maintain the moisture content in the degradation tank at approximately 50%. The degradation tank is then placed at 58±2°C. o Continuous observation was conducted in group C for 180 days. The main components of the compost included poultry and livestock manure, soybean meal, bagasse, sawdust, wheat bran, and waste from mushroom cultivation, while the composition of perlite is shown in Table 1 below:

[0058]

[0059] During the testing and monitoring process, a fresh 0.1 M KOH aqueous solution was prepared and dispensed into 50 mL PP containers. These containers were then placed in the degradation tank, which was subsequently placed in a constant temperature incubator (58±2). oIncubation was performed in C), where KOH aqueous solution absorbed the CO2 released during the degradation process. The KOH solution was replaced 6 times / week during the initial degradation phase (1-30 days), then 2 times / week after one month, until a total of 180 days was achieved. The total testing period could also exceed 180 days. The collected KOH was measured using a pH meter and compared with the control group (0.1 M KOH aqueous solution placed in a constant temperature incubator without degradation reaction). The hydrogen ion concentration was then calculated, and the CO2 weight was converted from the hydrogen ion concentration to estimate the decomposition rate. The conversion formulas are as follows: Hydroxide concentration change = Control group hydroxide concentration - Experimental group hydroxide concentration = Hydroxide ion concentration; Carbon dioxide weight (unit: mg) = Hydrogen ion concentration × 44 / 2 × 50 mL (44 is the molecular weight of carbon dioxide, 2 is the carbon dioxide reaction equilibrium coefficient, 50 mL is the volume of the aqueous solution); Inorganization (decomposition) percentage = Carbon dioxide weight change / Theoretical carbon dioxide content for complete decomposition of the composition × 100%.

[0060] The decomposition rate defined in this invention for day n can be the 7th, 8th, 9th, 10th, 14th, 24th, 25th, 26th, 28th, 29th, 30th, 31st, 42nd, 52nd, 56th, 59th, 63rd, 66th, 70th, 73rd, 77th, 80th, 84th, 87th, 91st, 94th, 98th, 101st, 150th, 154th, 157th, 175th, 178th, 182nd, or 185th day, or can be the decomposition rate for any day from day 1 to day 185.

[0061] The various technical features of the plastic composition and plasticizer of the present invention can be combined and configured to achieve the corresponding effects.

[0062] Another embodiment of the present invention provides a plastic product comprising the aforementioned plastic composition or the aforementioned plasticizer. Furthermore, the plastic product of the present invention can be packaging film, composite paper, disposable containers or storage containers, disposable tableware, food packaging, strapping, rope, wrapping film, agricultural seedling trays, mushroom storage bags, fertilizer bags, agricultural tape or bandages, agricultural spreading or covering materials, agricultural seedling trays, fruit and vegetable bags, agricultural bed covering film, surgical needles, surgical films, bone plates, drug carriers, inorganic mixtures, dental filling materials, biological suture anchors, biological tissue scaffolds, bone screws, biological tissue fillers, biological sutures, biological experimental culture dishes, biological experimental containers, biological experimental micropipettes, biological experimental centrifuge tubes, or laboratory gloves, etc.

[0063] Based on the above embodiments, specific comparative examples and embodiments are presented below and described in detail with reference to the accompanying drawings.

[0064] <First Comparative Example>

[0065] The plastic composition of the first comparative example contains only plastic, specifically polylactic acid (PLA). Please refer to Table 2 for the composition and content of the plastic composition of the first comparative example.

[0066]

[0067] Please refer to the above as well. Figure 1 Compared with Table 3, Figure 1 Table 3 shows the relationship between the decomposition rate of the plastic composition of the first comparative example and the number of days, while Table 3 shows the decomposition rate values ​​of the plastic composition of the first comparative example at different numbers of days.

[0068]

[0069]

[0070]

[0071] <Comparative Example 2>

[0072] The plastic composition of the second comparative example comprises a plastic and a plasticizer. The plastic is polyethylene terephthalate-1,4-cyclohexanediethanol ester (PETG), and the plasticizer is an amide ester compound. For details regarding the plasticizer of the second comparative example, please refer to Table 4.

[0073]

[0074] Additionally, please refer to Table 5 for the composition and content of the plastic composition of the second comparative example.

[0075]

[0076] Please refer to the above as well. Figure 2 Compared with Table 6, Figure 2 Table 6 shows the relationship between the decomposition rate of the plastic composition of the second comparative example and the number of days, while Table 6 shows the decomposition rate values ​​of the plastic composition of the second comparative example at different numbers of days.

[0077]

[0078]

[0079]

[0080] <Comparative Example 3>

[0081] The plastic composition of Comparative Example 3 contains only a plasticizer, which is acetyl tributyl citrate. Please refer to Table 7 for the composition and content of the plastic composition of Comparative Example 3.

[0082]

[0083] Please refer to the above as well. Figure 3 With Table 8, Figure 3 Table 8 shows the relationship between the decomposition rate of the plastic composition of the third comparative example and the number of days, while Table 8 shows the decomposition rate values ​​of the plastic composition of the third comparative example at different numbers of days.

[0084]

[0085]

[0086]

[0087] <First Embodiment>

[0088] The plastic composition of the first embodiment comprises a plastic and a plasticizer, wherein the plastic is polylactic acid and the plasticizer is an amide ester compound, the details of which are shown in Table 4 and will not be repeated here. For the composition and content of the plastic composition of the first embodiment, please refer to Table 9.

[0089]

[0090] Please refer to the above as well. Figure 4 Compared with Table 10, Figure 4 This is a graph showing the relationship between the decomposition rate of the plastic composition of the first embodiment and the number of days, while Table 10 shows the decomposition rate values ​​of the plastic composition of the first embodiment at different numbers of days.

[0091]

[0092]

[0093]

[0094] <Second Embodiment>

[0095] The plastic composition of the second embodiment contains only a plasticizer, which is an amide ester compound. Details of the amide ester compound are shown in Table 4 and will not be repeated here. For the composition and content of the plastic composition of the second embodiment, please refer to Table 11.

[0096]

[0097] Please refer to the above as well. Figure 5 Compared with Table 12, Figure 5 This is a graph showing the relationship between the decomposition rate and the number of days for the plastic composition of the second embodiment, while Table 12 shows the decomposition rate values ​​of the plastic composition of the second embodiment at different numbers of days.

[0098]

[0099]

[0100]

[0101] <Third Embodiment>

[0102] The plastic composition of the third embodiment comprises a plastic and a plasticizer. The plastic is polylactic acid, and the plasticizer is an amide ester compound. Details of the amide ester compound are shown in Table 4 and will not be repeated here. For the composition and content of the plastic composition of the third embodiment, please refer to Table 13.

[0103]

[0104] <Example 4>

[0105] The plastic composition of the fourth embodiment comprises a plastic and a plasticizer. The plastic is polylactic acid, and the plasticizer is an amide ester compound. Details of the amide ester compound are shown in Table 4 and will not be repeated here. For the composition and content of the plastic composition of the fourth embodiment, please refer to Table 14.

[0106]

[0107] <Version 5>

[0108] The plastic composition of the fifth embodiment comprises a plastic and a plasticizer, wherein the plastic is polylactic acid and the plasticizer is an amide ester compound, the details of which are shown in Table 4 and will not be repeated here. For the composition and content of the plastic composition of the fifth embodiment, please refer to Table 15.

[0109]

[0110] <Sixth Embodiment>

[0111] The plastic composition of the sixth embodiment comprises a plastic and a plasticizer, wherein the plastic is polylactic acid and the plasticizer is an amide ester compound, the details of which are shown in Table 4 and will not be repeated here. For the composition and content of the plastic composition of the sixth embodiment, please refer to Table 16.

[0112]

[0113] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A plastic composition, characterized in that, Include: At least one plastic, the plastic comprising polylactic acid; and At least one plasticizer comprising an amide ester compound that is biodegradable, and the plasticizer having a structure as shown in formula (I): Where X is a central structure, Y is a first long chain structure, and Z is a second long chain structure, and the number of carbon atoms in X is XC, the number of carbon atoms in Y is YC, and the number of carbon atoms in Z is ZC, satisfying the following conditions: 1 ≤ XC ≤ 6; 14 ≤ YC ≤ 25; and 14 ≤ ZC ≤ 25; Wherein, X is a straight-chain alkylene group, and the structures of Y and Z have at least one of carbon-carbon single bond, carbon-carbon double bond, carbon-carbon triple bond and carbon-oxygen bond. The plastic constitutes 85% to 99.99% of the plastic composition by weight, and the plasticizer constitutes 0.01% to 15% of the plastic composition by weight.

2. The plastic composition according to claim 1, characterized in that, The decomposition rate on day 14 is Dr14, and the decomposition rate of the plastic composition on day 14 meets the following conditions: 1% ≤ Dr14。 3. The plastic composition according to claim 2, characterized in that, The decomposition rate on day 21 is Dr21, and the decomposition rate of the plastic composition on day 21 meets the following conditions: 6% ≤ Dr21。 4. The plastic composition according to claim 3, characterized in that, The decomposition rate on day 28 is Dr28, and the decomposition rate of the plastic composition on day 28 meets the following conditions: 15% ≤ Dr28。 5. The plastic composition according to claim 4, characterized in that, The decomposition rate on day 42 is Dr42, and the decomposition rate of the plastic composition on day 42 meets the following conditions: 20% ≤ Dr42。 6. The plastic composition according to claim 1, characterized in that, It also includes: At least one non-biodegradable plastic, wherein the weight percentage of the at least one non-biodegradable plastic is less than the weight percentage of the polylactic acid.

7. The plastic composition according to claim 1, characterized in that, The plastic constitutes 87.5% to 99.99% of the plastic composition by weight, and the plasticizer constitutes 0.01% to 12.5% ​​of the plastic composition by weight.

8. The plastic composition according to claim 7, characterized in that, The molecular weight of this plasticizer is Mw, and it meets the following conditions: 500 g / mol ≤ Mw.

9. The plastic composition according to claim 1, characterized in that, X has XC carbon atoms, Y has YC carbon atoms, and Z has ZC carbon atoms, satisfying the following condition: 2 ≤ XC ≤ 5; 14 ≤ YC ≤ 24; and 14 ≤ ZC ≤ 24.

10. The plastic composition according to claim 9, characterized in that, The structures of Y and Z contain carbon-carbon double bonds.

11. The plastic composition according to claim 9, characterized in that, The pyrolysis temperature of this plasticizer is Pt, which satisfies the following conditions: 100 o C ≤ Pt ≤ 300 o C。 12. A plastic product, characterized in that, Include: The plastic composition as claimed in claim 1.

13. A plastic composition, characterized in that, Include: At least one plastic, the plastic comprising polylactic acid; and At least one plasticizer is biodegradable and has a structure as shown in formula (I): Where X is a central structure, Y is a first long chain structure, and Z is a second long chain structure, and the number of carbon atoms in X is XC, the number of carbon atoms in Y is YC, and the number of carbon atoms in Z is ZC, satisfying the following conditions: 1 ≤ XC ≤ 6; 14 ≤ YC ≤ 25; and 14 ≤ ZC ≤ 25; Wherein, X is a straight-chain alkylene group, and the structures of Y and Z have at least one of carbon-carbon single bonds, carbon-carbon double bonds, carbon-carbon triple bonds, and carbon-oxygen bonds.

14. The plastic composition of claim 13, characterized in that, The molecular weight of this plasticizer is Mw, and it meets the following conditions: 500 g / mol ≤ Mw.

15. The plastic composition of claim 14, characterized in that, The plastic comprises 90% to 99% by weight of the plastic composition, and the plasticizer comprises 1% to 10% by weight of the plastic composition.

16. The plastic composition of claim 13, characterized in that, X has XC carbon atoms, Y has YC carbon atoms, and Z has ZC carbon atoms, satisfying the following condition: 2 ≤ XC ≤ 5; 14 ≤ YC ≤ 24; and 14 ≤ ZC ≤ 24.

17. The plastic composition of claim 16, characterized in that, The structures of Y and Z contain carbon-carbon double bonds.

18. The plastic composition of claim 14, characterized in that, The pyrolysis temperature of this plasticizer is Pt, which satisfies the following conditions: 100 o C ≤ Pt ≤ 300 o C。 19. The plastic composition of claim 14, characterized in that, The decomposition rate on day 14 is Dr14, and the decomposition rate of the plastic composition on day 14 meets the following conditions: 1% ≤ Dr14。 20. The plastic composition of claim 14, characterized in that, The decomposition rate on day 21 is Dr21, and the decomposition rate of the plastic composition on day 21 meets the following conditions: 6% ≤ Dr21。 21. The plastic composition of claim 14, characterized in that, The decomposition rate on day 28 is Dr28, and the decomposition rate of the plastic composition on day 28 meets the following conditions: 15% ≤ Dr28。 22. The plastic composition of claim 14, characterized in that, The decomposition rate on day 42 is Dr42, and the decomposition rate of the plastic composition on day 42 meets the following conditions: 20% ≤ Dr42。 23. A plastic product, characterized in that, Include: The plastic composition as claimed in claim 13.

24. A plastic composition, characterized in that, Include: At least one plastic, the plastic comprising polylactic acid; and At least one plasticizer is biodegradable and has a structure as shown in formula (I): Where X is a central structure, Y is a first long chain structure, and Z is a second long chain structure, and the number of carbon atoms in X is XC, the number of carbon atoms in Y is YC, and the number of carbon atoms in Z is ZC, satisfying the following conditions: 2 ≤ XC ≤ 5; 14 ≤ YC ≤ 24; and 14 ≤ ZC ≤ 24; Wherein, X is a straight-chain alkylene group, and the structures of Y and Z have at least one of carbon-carbon single bond, carbon-carbon double bond, carbon-carbon triple bond and carbon-oxygen bond. The decomposition rate on day 7 was Dr7, and the decomposition rate of the plasticizer on day 7 met the following conditions: 20% ≤ Dr7。 25. The plastic composition of claim 24, characterized in that, The molecular weight of this plasticizer is Mw, and it meets the following conditions: 500 g / mol ≤ Mw.

26. The plastic composition of claim 25, characterized in that, The decomposition rate on day 21 is Dr21, and the decomposition rate of the plasticizer on day 21 meets the following conditions: 65% ≤ Dr21。 27. The plastic composition of claim 24, characterized in that, X has XC carbon atoms, Y has YC carbon atoms, and Z has ZC carbon atoms, satisfying the following condition: 2 ≤ XC ≤ 4; 14 ≤ YC ≤ 23; and 14 ≤ ZC ≤ 23.

28. The plastic composition of claim 27, characterized in that, The structures of Y and Z contain carbon-carbon double bonds.

29. The plastic composition of claim 25, characterized in that, The pyrolysis temperature of this plasticizer is Pt, which satisfies the following conditions: 100 o C ≤ Pt ≤ 300 o C。 30. A plastic product, characterized in that, Include: The plastic composition as claimed in claim 24.

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