A biodegradable composition, its preparation and use

Abstract

This invention belongs to the field of CO8L technology, and more specifically relates to a biodegradable composition, its preparation method, and its application. A biodegradable composition is prepared from raw materials including a carbon dioxide-containing polymer, a polyester polymer, and additives; the melt index of the polyester polymer is 2-50 g / 10 min. This invention modifies PPCP and PBS by blending, resulting in a series of PPCP / PBS compositions to obtain biodegradable materials with mechanical, processing, and performance characteristics suitable for practical applications. Furthermore, the biodegradable compositions prepared by this invention have significant application prospects in fields such as plates, bowls, basins, folders, straws, shopping bags, garbage bags, packaging bags, mulch films, gloves, combs, toothbrush handles, knives, forks, stationery, cushioning packaging, and thermal insulation materials.

Description

Technical Field

[0001] This invention belongs to the field of CO8L technology, and more specifically relates to a biodegradable composition, its preparation method and application. Background Technology

[0002] Carbon dioxide-containing polymers are phthalate-propylene carbonate copolymers developed from carbon dioxide copolymers. In practical applications, this amorphous polymer plays a significant role in the production of food packaging bags and shopping bags due to its excellent biodegradability and gas barrier properties. However, phthalate-propylene carbonate copolymers are relatively brittle, and further performance optimization is needed to fully realize their practical applications.

[0003] To optimize the properties of propylene glycol phthalate-propylene carbonate copolymers, some current research involves compounding these copolymers with other polyester polymers to improve mechanical properties without compromising biodegradability. Current research often utilizes the interaction of two different polymers to enhance various aspects of a material's mechanical properties. For example, patent publication CN109177401A discloses a fully biodegradable blown film prepared using polylactic acid and polybutylene terephthalate (PET) as raw materials, aiming to alter the material's biodegradability. However, developing a new material that simultaneously possesses transparency, biodegradability, and mechanical properties remains a challenge for researchers. Summary of the Invention

[0004] To address the aforementioned technical problems, a first aspect of the present invention provides a biodegradable composition, the raw materials of which include a carbon dioxide-containing polymer, a polyester polymer material, and additives;

[0005] The melt index of the polyester polymer material is 2-50 g / 10 min at 190 °C and 2.16 kg.

[0006] More preferably, the melt index of the polyester polymer material is 2-25 g / 10 min, 2.16 kg at 190 °C.

[0007] More preferably, the melt index of the polyester polymer material is 2-10 g / 10 min, 2.16 kg at 190 °C.

[0008] More preferably, the melt index of the polyester polymer material is 5 g / 10 min, 190 °C, 2.16 kg.

[0009] In some preferred embodiments, the polyester polymer material includes polybutylene succinate.

[0010] Polybutylene succinate, melt index 5 g / 10 min, 190℃, 2.16 kg, purchased from Shanghai Hotspot Engineering Plastics Co., Ltd.

[0011] In some preferred embodiments, the weight ratio of the carbon dioxide-containing polymer to the polyester polymer is 1-99:99-1.

[0012] In some preferred embodiments, the weight ratio of the carbon dioxide-containing polymer to the polyester polymer is 1:(1-10); preferably, the weight ratio of the carbon dioxide-containing polymer to the polyester polymer is 1:3.5.

[0013] In some preferred embodiments, the carbon dioxide-containing polymer is a propylene glycol phthalate-propylene carbonate copolymer.

[0014] The propylene glycol phthalate-propylene carbonate copolymer was purchased from Shandong Lianchuang New Materials Group.

[0015] In some preferred embodiments, the additives include at least one of compatibilizers, antioxidants, light stabilizers, pigments, plasticizers, lubricants, fillers, foaming agents, flame retardants, antistatic agents, and release agents.

[0016] In some preferred embodiments, the additives include antioxidants and plasticizers.

[0017] Preferably, the antioxidants include antioxidant 1076 and antioxidant 168.

[0018] More preferably, the weight ratio of antioxidant 1076 to antioxidant 168 is 1:(0.5-2.5).

[0019] In some preferred embodiments, the plasticizer is tributyl citrate.

[0020] In some preferred embodiments, the compatibilizer is selected from at least one of isocyanate compatibilizers, epoxy compound compatibilizers, and oxazoline compatibilizers.

[0021] In some preferred embodiments, the compatibilizer includes at least one of glycidyl methacrylate, grafted glycidyl methacrylate, hexamethylene diisocyanate, and 4,4-diphenylmethane diisocyanate.

[0022] In some preferred embodiments, the grafted glycidyl methacrylate is selected from at least one of polylactic acid grafted glycidyl methacrylate, polybutylene succinate grafted glycidyl methacrylate, and polybutylene adipate grafted glycidyl methacrylate.

[0023] More preferably, the grafted modified glycidyl methacrylate is polybutylene succinate grafted with glycidyl methacrylate.

[0024] The preparation method of polybutylene succinate grafted with glycidyl methacrylate includes the following steps:

[0025] Polybutylene succinate, glycidyl methacrylate, and benzoyl peroxide are added to a reaction vessel and mixed at 100-150°C for 5-10 minutes to obtain polybutylene succinate grafted with glycidyl methacrylate.

[0026] The weight ratio of polybutylene succinate, glycidyl methacrylate, and benzoyl peroxide is 3:(0.5-2):0.1.

[0027] In some preferred embodiments, the compatibilizer comprises 0.1-20% of the total weight of the carbon dioxide-containing polymer and polyester polymer; preferably, it comprises 0.1-5% of the total weight of the carbon dioxide-containing polymer and polyester polymer.

[0028] Through extensive creative experimental research, the applicant discovered that in this system, the compatibility between polybutylene succinate and propylene glycol phthalate-propylene carbonate copolymer is greatly improved by grafting glycidyl methacrylate onto polybutylene succinate. Furthermore, a uniform distribution is formed at the interface between the two phases of polybutylene succinate and propylene glycol phthalate-propylene carbonate copolymer. When the prepared material is subjected to external tensile stress, the stress received in different phase intervals can be rapidly dispersed and transferred, greatly improving its tensile properties.

[0029] Meanwhile, during the experiment, the applicant found that when the weight of the added compatibilizer was 0.1-5% of the total weight of the carbon dioxide-containing polymer and polyester polymer materials, it could greatly improve the tensile properties of the prepared material. In particular, when the weight of the compatibilizer was 0.9% of the total weight of the carbon dioxide-containing polymer and polyester polymer materials, it could enhance the interaction strength between the compatibilizer and the active groups present in the system, avoid the escape and powdering of the additives, antioxidants, and plasticizers on the product surface, and ensure its excellent mechanical properties while also ensuring stability.

[0030] In some preferred embodiments, the raw materials for preparing the biodegradable composition, by weight percentage, include: 20-50% carbon dioxide-containing polymer, 40-80% polyester polymer, and the remainder of additives to bring the total to 100%.

[0031] A second aspect of the present invention provides a method for preparing a biodegradable composition, comprising the following steps:

[0032] 1) A mixture is obtained by pre-mixing a carbon dioxide-containing polymer, a polyester polymer material, and additives;

[0033] 2) Add the mixture to a melt mixing equipment and mix for 5-30 minutes. Then add it to a twin-screw extruder and extrude and granulate it at 100℃-180℃ to obtain the final product.

[0034] A third aspect of the present invention provides an application of a biodegradable composition for use in the fields of daily necessities, office supplies, toys, packaging materials, and thermal insulation materials.

[0035] Beneficial effects: The biodegradable composition provided by the present invention has the following advantages compared with the prior art:

[0036] This invention modifies PPCP and PBS by blending, resulting in a series of PPCP / PBS compositions that provide biodegradable materials with mechanical, processing, and performance characteristics suitable for practical applications.

[0037] Furthermore, the biodegradable composition prepared by this invention has great application prospects in the fields of plates, bowls, basins, folders, straws, shopping bags, garbage bags, packaging bags, mulch films, gloves, combs, toothbrush handles, knives, forks, stationery, cushioning packaging, and thermal insulation materials. Detailed Implementation

[0038] Example

[0039] Example 1

[0040] A biodegradable composition, wherein the raw materials, by weight percentage, comprise: 21% carbon dioxide-containing polymer, 73.5% polyester polymer, and the remainder of additives to bring the total to 100%.

[0041] The carbon dioxide-containing polymer is a propylene glycol phthalate-propylene carbonate copolymer, purchased from Shandong Lianchuang New Materials Group.

[0042] The polyester polymer material is polybutylene succinate, with a melt index of 5 g / 10 min, 2.16 kg at 190°C, purchased from Shanghai Hotspot Engineering Plastics Co., Ltd.

[0043] The additives include compatibilizers, antioxidants, and plasticizers.

[0044] The raw materials used in the preparation of the additives, by weight percentage, include: 0.85% compatibilizer, 2.15% antioxidant, and 2.5% plasticizer;

[0045] The compatibilizer is polybutylene succinate grafted with glycidyl methacrylate, and the preparation method includes the following steps:

[0046] Polybutylene succinate, glycidyl methacrylate, and benzoyl peroxide are added to a reaction vessel and mixed at 100-150°C for 5-10 minutes to obtain polybutylene succinate grafted with glycidyl methacrylate.

[0047] The weight ratio of polybutylene succinate, glycidyl methacrylate, and benzoyl peroxide is 3:1.2:0.1, and the amount of glycidyl methacrylate added is 1.2g.

[0048] Polybutylene succinate, brand name FZ91PM, purchased from Suzhou Sujin Plastic New Materials Co., Ltd.

[0049] The antioxidants are antioxidant 1076 and antioxidant 168 in a weight ratio of 1:1.15.

[0050] The plasticizer mentioned is tributyl citrate.

[0051] A method for preparing a biodegradable composition includes the following steps:

[0052] 1) A mixture is obtained by pre-mixing a carbon dioxide-containing polymer, a polyester polymer material, and additives;

[0053] 2) Add the mixture to a melt mixing equipment and mix for 20 minutes. Then add it to a twin-screw extruder and extrude and granulate it at 140°C to obtain the final product.

[0054] Example 2

[0055] A biodegradable composition, wherein the raw materials, by weight percentage, comprise: 18% carbon dioxide-containing polymer, 76.5% polyester polymer, and the remainder of additives to bring the total to 100%.

[0056] The carbon dioxide-containing polymer is a propylene glycol phthalate-propylene carbonate copolymer, purchased from Shandong Lianchuang New Materials Group.

[0057] The polyester polymer material is polybutylene succinate, with a melt index of 5 g / 10 min, 2.16 kg at 190°C, purchased from Shanghai Hotspot Engineering Plastics Co., Ltd.

[0058] The additives include compatibilizers, antioxidants, and plasticizers.

[0059] The raw materials used in the preparation of the additives, by weight percentage, include: 0.85% compatibilizer, 2.15% antioxidant, and 2.5% plasticizer;

[0060] The compatibilizer is polybutylene succinate grafted with glycidyl methacrylate, and the preparation method includes the following steps:

[0061] Polybutylene succinate, glycidyl methacrylate, and benzoyl peroxide are added to a reaction vessel and mixed at 100-150°C for 5-10 minutes to obtain polybutylene succinate grafted with glycidyl methacrylate.

[0062] The weight ratio of polybutylene succinate, glycidyl methacrylate, and benzoyl peroxide is 3:1.2:0.1, and the amount of glycidyl methacrylate added is 1.2g.

[0063] Polybutylene succinate, brand name FZ91PM, purchased from Suzhou Sujin Plastic New Materials Co., Ltd.

[0064] The antioxidants are antioxidant 1076 and antioxidant 168 in a weight ratio of 1:1.15.

[0065] The plasticizer mentioned is tributyl citrate.

[0066] A method for preparing a biodegradable composition includes the following steps:

[0067] 1) A mixture is obtained by pre-mixing a carbon dioxide-containing polymer, a polyester polymer material, and additives;

[0068] 2) Add the mixture to a melt mixing equipment and mix for 20 minutes. Then add it to a twin-screw extruder and extrude and granulate it at 140°C to obtain the final product.

[0069] Example 3

[0070] A biodegradable composition, wherein the raw materials, by weight percentage, comprise: 21% carbon dioxide-containing polymer, 73.5% polyester polymer, and the remainder of additives to bring the total to 100%.

[0071] The carbon dioxide-containing polymer is a propylene glycol phthalate-propylene carbonate copolymer, purchased from Shandong Lianchuang New Materials Group.

[0072] The polyester polymer material is polybutylene succinate, with a melt index of 22 g / 10 min, 2.16 kg at 190 °C, purchased from Shanghai Hotspot Engineering Plastics Co., Ltd.

[0073] The additives include compatibilizers, antioxidants, and plasticizers.

[0074] The raw materials used in the preparation of the additives, by weight percentage, include: 0.85% compatibilizer, 2.15% antioxidant, and 2.5% plasticizer;

[0075] The compatibilizer is polybutylene succinate grafted with glycidyl methacrylate, and the preparation method includes the following steps:

[0076] Polybutylene succinate, glycidyl methacrylate, and benzoyl peroxide are added to a reaction vessel and mixed at 100-150°C for 5-10 minutes to obtain polybutylene succinate grafted with glycidyl methacrylate.

[0077] The weight ratio of polybutylene succinate, glycidyl methacrylate, and benzoyl peroxide is 3:1.2:0.1, and the amount of glycidyl methacrylate added is 1.2g.

[0078] Polybutylene succinate, brand name FZ91PM, purchased from Suzhou Sujin Plastic New Materials Co., Ltd.

[0079] The antioxidants are antioxidant 1076 and antioxidant 168 in a weight ratio of 1:1.15.

[0080] The plasticizer mentioned is tributyl citrate.

[0081] A method for preparing a biodegradable composition includes the following steps:

[0082] 1) A mixture is obtained by pre-mixing a carbon dioxide-containing polymer, a polyester polymer material, and additives;

[0083] 2) Add the mixture to a melt mixing equipment and mix for 20 minutes. Then add it to a twin-screw extruder and extrude and granulate it at 140°C to obtain the final product.

[0084] Example 4

[0085] A biodegradable composition, wherein the raw materials, by weight percentage, comprise: 21% carbon dioxide-containing polymer, 73.5% polyester polymer, and the remainder of additives to bring the total to 100%.

[0086] The carbon dioxide-containing polymer is a propylene glycol phthalate-propylene carbonate copolymer, purchased from Shandong Lianchuang New Materials Group.

[0087] The polyester polymer material is polybutylene succinate, with a melt index of 5 g / 10 min, 2.16 kg at 190°C, purchased from Shanghai Hotspot Engineering Plastics Co., Ltd.

[0088] The additives include compatibilizers, antioxidants, and plasticizers.

[0089] The raw materials used in the preparation of the additives, by weight percentage, include: 0.85% compatibilizer, 2.15% antioxidant, and 2.5% plasticizer;

[0090] The compatibilizer is glycidyl methacrylate;

[0091] The antioxidants are antioxidant 1076 and antioxidant 168 in a weight ratio of 1:1.15.

[0092] The plasticizer mentioned is tributyl citrate.

[0093] A method for preparing a biodegradable composition includes the following steps:

[0094] 1) A mixture is obtained by pre-mixing a carbon dioxide-containing polymer, a polyester polymer material, and additives;

[0095] 2) Add the mixture to a melt mixing equipment and mix for 20 minutes. Then add it to a twin-screw extruder and extrude and granulate it at 140°C to obtain the final product.

[0096] Example 5

[0097] A biodegradable composition, wherein the raw materials, by weight percentage, comprise: 21% carbon dioxide-containing polymer, 73.5% polyester polymer, and the remainder of additives to bring the total to 100%.

[0098] The carbon dioxide-containing polymer is a propylene glycol phthalate-propylene carbonate copolymer, purchased from Shandong Lianchuang New Materials Group.

[0099] The polyester polymer material is polybutylene succinate, with a melt index of 5 g / 10 min, 2.16 kg at 190°C, purchased from Shanghai Hotspot Engineering Plastics Co., Ltd.

[0100] The additives include compatibilizers, antioxidants, and plasticizers.

[0101] The raw materials used in the preparation of the additives, by weight percentage, include: 0.85% compatibilizer, 2.15% antioxidant, and 2.5% plasticizer;

[0102] The compatibilizer is polybutylene succinate grafted with glycidyl methacrylate, and the preparation method includes the following steps:

[0103] Polybutylene succinate, glycidyl methacrylate, and benzoyl peroxide are added to a reaction vessel and mixed at 100-150°C for 5-10 minutes to obtain polybutylene succinate grafted with glycidyl methacrylate.

[0104] The weight ratio of polybutylene succinate, glycidyl methacrylate, and benzoyl peroxide is 3:1.2:0.1, and the amount of glycidyl methacrylate added is 1.2g.

[0105] Polybutylene succinate, brand name FZ91PM, purchased from Suzhou Sujin Plastic New Materials Co., Ltd.

[0106] The antioxidant is antioxidant 1076 and antioxidant 168 in a weight ratio of 1:0.5.

[0107] The plasticizer mentioned is tributyl citrate.

[0108] A method for preparing a biodegradable composition includes the following steps:

[0109] 1) A mixture is obtained by pre-mixing a carbon dioxide-containing polymer, a polyester polymer material, and additives;

[0110] 2) Add the mixture to a melt mixing equipment and mix for 20 minutes. Then add it to a twin-screw extruder and extrude and granulate it at 140°C to obtain the final product.

[0111] Performance testing:

[0112] 1. Tensile strength test: The biodegradable compositions prepared in Examples 1-5 were used for tensile strength testing. The test method was in accordance with GB / T-1040.1-2006, and the test results were recorded in the table below.

[0113] 2. Elongation at break test: The biodegradable compositions prepared in Examples 1-5 were used for the elongation at break test. The test method was in accordance with GB / T-1040.1-2006, and the test results were recorded in the table below.

[0114] 3. Biodegradability test: The biodegradable compositions prepared in Examples 1-5 were used for biodegradability test. The test method was in accordance with GB / T19277, and the test results were recorded in the table below.

[0115] Example 1 25 150 9 Example 2 22 100 9 Example 3 18 135 10 Example 4 15 95 12 Example 5 24 138 14

Claims

1. A biodegradable composition, characterized in that, The raw materials for preparation include carbon dioxide-containing polymers, polyester polymers, and additives; The raw materials for preparation, by weight percentage, include: 20-50% carbon dioxide-containing polymers, 40-80% polyester polymers, and the remainder of additives to bring the total to 100%. The polyester polymer material includes polybutylene succinate, with a melt index of 5 g / 10 min, 2.16 kg at 190 °C; The carbon dioxide-containing polymer is a propylene glycol phthalate-propylene carbonate copolymer; The additives include antioxidants, plasticizers, and compatibilizers; The compatibilizer is polybutylene succinate grafted with glycidyl methacrylate, and the weight of the compatibilizer is 0.1-5% of the total weight of the carbon dioxide polymer and polyester polymer materials.

2. A method for preparing the biodegradable composition according to claim 1, characterized in that, Includes the following steps: 1) A mixture is obtained by pre-mixing a carbon dioxide-containing polymer, a polyester polymer material, and additives; 2) Add the mixture to a melt mixing equipment and mix for 5-30 minutes. Then add it to a twin-screw extruder and extrude and granulate it at 100℃-180℃ to obtain the final product.

3. An application of the biodegradable composition according to claim 1, characterized in that, It is used in the fields of daily necessities, office supplies, toys, packaging materials, and thermal insulation materials.