CN112646231A

CN112646231A - Photooxidation biodegradation modifier

Info

Publication number: CN112646231A
Application number: CN202011581725.6A
Authority: CN
Inventors: 陈荣展
Original assignee: Huizhou Guanzhan Industrial Co ltd
Current assignee: Huizhou Guanzhan Industrial Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-04-13

Abstract

The invention discloses a photooxidation biodegradation modifier, belongs to the technical field of processing and application of high polymer materials, and solves the problem of poor biodegradation effect of polypropylene, wherein the raw materials comprise 2- (2 ' -hydroxy-3 ' -tert-butyl-5 ' -methylphenyl) -5-chlorobenzotriazole as an ultraviolet absorber, pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] as an antioxidant A, and tris (2, 4-di-tert-butylphenyl) phosphite and ferric stearate as an antioxidant B. The photooxidation biodegradation modifier is an additive and plays a role in photooxidation biodegradation on polypropylene (PP). The application range of the polypropylene (PP) is limited to PP materials, the addition amount is at least 1 percent, the polypropylene (PP) is suitable for the traditional production processes of plastic uptake, injection molding and blow molding, and the physical properties of the polypropylene (PP) are not changed as a side effect.

Description

Photooxidation biodegradation modifier

Technical Field

The invention relates to the technical field of processing and application of high polymer materials, in particular to a photooxidation biodegradation modifier.

Background

The plastic industry is rapidly developed, the application of the plastic has penetrated into various fields of national economy, and the application is very wide. The amount of waste plastics generated in China each year is about 500 million tons, the plastic raw materials belong to chemical synthetic raw materials and cannot be naturally decomposed, disposable plastic packaging wastes, plastic farmland films are randomly discarded by people to cause visual pollution, and potential harm to the environment caused by the waste plastics has attracted general attention of government-related departments and society. The biodegradable plastic provides a new idea for people to solve the 'white pollution'. Although biodegradable plastics are known and used, the existing biodegradable polypropylene has the defect of low mechanical property.

The polypropylene is used as an important raw material for processing the film, the biodegradation performance of the polypropylene directly influences the environmental protection, at present, the biodegradation of the polypropylene needs to be improved in the aspects of photodegradation and biodegradation, but the photodegradation behavior can only occur in a bright place and has certain limitation. Biodegradation is achieved by adding modified starch, but it has some influence on the function and appearance of the product, and some products are difficult to finally decompose. Oxidative degradation is degraded under an aerobic condition, but the additive is metal salt polluted soil, most importantly, the degradation has a certain period, strict requirements are imposed on the service period of a product, waste materials in the production process cannot be recycled, and the method cannot be popularized in a large range.

Aiming at the problem of biodegradation of polypropylene, the photooxidation biodegradation modifier needs to be provided to solve the problem.

Disclosure of Invention

The invention aims to provide a photooxidation biodegradation modifier to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a photooxidation biodegradation modifier comprises the following raw materials in parts by weight:

as a further scheme of the invention: the feed comprises the following raw materials in parts by weight:

as a still further scheme of the invention: the feed comprises the following raw materials in parts by weight:

as a still further scheme of the invention: the ultraviolet light absorber is 2- (2 ' -hydroxy-3 ' -tert-butyl-5 ' -methylphenyl) -5-chlorobenzotriazole.

As a still further scheme of the invention: the antioxidant A is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester.

As a still further scheme of the invention: the antioxidant B is tris (2, 4-di-tert-butylphenyl) phosphite.

As a still further scheme of the invention: the photodegradant is ferric stearate.

As a still further scheme of the invention: the ultraviolet light absorber is commonly known as/brand/CAS No. as UV 326; the common name/brand/CAS No. of the antioxidant A is antioxidant 1010; the antioxidant B is commonly known as antioxidant 168 under the name of/brand/CAS No. thereof.

Compared with the prior art, the invention has the beneficial effects that:

the photooxidation biodegradation modifier is an additive and plays a role in photooxidation biodegradation on polypropylene (PP). The application range of the polypropylene (PP) biodegradable plastic-injection-blow molding material is limited to PP materials, the addition amount is at least 1%, the polypropylene (PP) biodegradable plastic-injection-molding material is suitable for the traditional plastic-injection-molding and blow-molding production processes, the physical characteristics of the polypropylene (PP) are not changed, the molecular weight of the polypropylene (PP) materials is reduced to a certain degree by the action of light in the degradation process, and then the polypropylene (PP) materials are oxidized and biodegraded, wherein the molecular weight is reduced by the action of light, so that the high molecular weight is reduced to 5000 molecular weights from twenty-three-hundred thousand, and the polypropylene (PP) biodegradable plastic. Finally, the 5000 molecular weight is decomposed by microbial oxidation and biological decomposition, and the final decomposed products are carbohydrate and organic matters.

Detailed Description

The technical solution of the present invention will be described in further detail with reference to specific embodiments.

Example 1

A photooxidation biodegradation modifier comprises the following raw materials in parts by weight: the ultraviolet light absorber is 130 parts of 2- (2 ' -hydroxy-3 ' -tert-butyl-5 ' -methylphenyl) -5-chlorobenzotriazole, the antioxidant A is 5 parts of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, the antioxidant B is 30 parts of tris (2, 4-di-tert-butylphenyl) phosphite and 150 parts of ferric stearate.

When the polypropylene (PP) is biodegraded, the mass content of the polypropylene (PP) is 96%, the mass content of the photooxidation biodegradation modifier is 3.85%, and the balance is calcium stearate.

Example 2

A photooxidation biodegradation modifier comprises the following raw materials in parts by weight: the ultraviolet light absorber is 135 parts of 2- (2 ' -hydroxy-3 ' -tert-butyl-5 ' -methylphenyl) -5-chlorobenzotriazole, the antioxidant A is 6 parts of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, the antioxidant B is 33 parts of tris (2, 4-di-tert-butylphenyl) phosphite and 55 parts of ferric stearate.

When the polypropylene (PP) is biodegraded, the mass content of the polypropylene (PP) is 96%, the mass content of the photooxidation biodegradation modifier is 3.57%, and the balance is calcium stearate.

Example 3

A photooxidation biodegradation modifier comprises the following raw materials in parts by weight: the ultraviolet light absorber is 140 parts of 2- (2 ' -hydroxy-3 ' -tert-butyl-5 ' -methylphenyl) -5-chlorobenzotriazole, the antioxidant A is 8 parts of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, the antioxidant B is 35 parts of tris (2, 4-di-tert-butylphenyl) phosphite and 160 parts of ferric stearate.

When the polypropylene (PP) is biodegraded, the mass content of the polypropylene (PP) is 97%, the mass content of the photooxidation biodegradation modifier is 2.75%, and the balance is calcium stearate.

Example 4

A photooxidation biodegradation modifier comprises the following raw materials in parts by weight: the ultraviolet light absorber is 145 parts of 2- (2 ' -hydroxy-3 ' -tert-butyl-5 ' -methylphenyl) -5-chlorobenzotriazole, the antioxidant A is 9 parts of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, the antioxidant B is 37 parts of tris (2, 4-di-tert-butylphenyl) phosphite and 165 parts of ferric stearate.

When the polypropylene (PP) is biodegraded, the mass content of the polypropylene (PP) is 97%, the mass content of the photooxidation biodegradation modifier is 2.84%, and the balance is calcium stearate.

Example 5

A photooxidation biodegradation modifier comprises the following raw materials in parts by weight: the ultraviolet light absorber is 150 parts of 2- (2 ' -hydroxy-3 ' -tert-butyl-5 ' -methylphenyl) -5-chlorobenzotriazole, the antioxidant A is 10 parts of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, the antioxidant B is 40 parts of tris (2, 4-di-tert-butylphenyl) phosphite and 170 parts of ferric stearate.

When the polypropylene (PP) is biodegraded, the mass content of the polypropylene (PP) is 98 percent, and the mass content of the photooxidation biodegradation modifier is 2 percent.

In the degradation process, the photooxidation biodegradation modifier utilizes the light effect to reduce the molecular weight of a polypropylene (PP) material to a certain degree, then carries out microbial oxidation and biodegradation, for example, the photooxidation biodegradation is to reduce the high molecular weight so that the high molecular weight is reduced from twenty-thirty-thousand to 5000 molecular weights, the 5000 molecular weights are suitable for the microbial oxidation biodegradation, and after the molecular weight reaches 5000, the photooxidation biodegradation modifier is subjected to the microbial oxidation biodegradation, and finally, decomposed products are carbohydrates and organic matters.

While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. The photooxidation biodegradation modifier is characterized by comprising the following raw materials in parts by weight:

2. the photooxidative biodegradation modifier of claim 1, comprising the following raw materials in parts by weight:

3. the photooxidative biodegradation modifier of claim 2, comprising the following raw materials in parts by weight:

4. the photooxidative biodegradation modifier of any one of claims 1-3, wherein said ultraviolet light absorber is 2- (2 ' -hydroxy-3 ' -tert-butyl-5 ' -methylphenyl) -5-chlorobenzotriazole.

5. A photooxidative biodegradation modifier as claimed in any one of claims 1 to 3, wherein said antioxidant a is pentaerythritol tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ].

6. The photooxidative biodegradation modifier of any one of claims 1-3, wherein said antioxidant B is tris (2, 4-di-t-butylphenyl) phosphite.

7. The photooxidative biodegradation modifier of any one of claims 1-3, wherein the photodegradant is iron stearate.

8. The photooxidative biodegradation modifier of any one of claims 1-3 wherein said photooxidative biodegradation modifier is applied to polypropylene materials and is added in an amount of at least 1% by weight.