Biodegradable resin composition and product thereof

A biodegradable resin and biodegradable technology, applied in the field of biodegradable resin compositions, can solve the problems of deterioration of physical properties, poor resistance to humidity and heat, degradation of resistance to hydrolysis and resistance to heat and oxygen, and high processing requirements, so as to improve physical properties. Performance and processability, the effect of good physical properties and processability

Active Publication Date: 2011-05-25
KINGFA SCI & TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] So far, the biodegradable resin composition can not fully meet the aforementioned conditions, and the main problems are: 1. The biodegradation rate of the biodegradable resin composition is unstable under the environmental conditions of recycling; 2. The biodegradable resin composition The physical properties cannot meet the needs of practical applications, the processing requirements are high, and the application range is narrow; 3. In the usual application environment, the biodegradable resin composition is degraded due to its poor moisture resistance, hydrolysis resistance and thermal oxygen resistance. Faster, often accompanied by a decrease in molecular weight and deterioration of physical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0072] The operation of the comparative example was repeated, and the compositions listed in Table 2 were used in the formulations of Examples 1-6, and the measured values ​​of the corresponding physical properties were also listed in Table 2.

[0073] Table 2

[0074] Implementation column

[0075] The test data of embodiment 1-6 and comparative example 1-6 shows, the embodiment row 1 and 2 that contain epoxy chain extender can obviously improve the heat resistance of base material, the embodiment row 3 and 4 that contain carbodiimide The hydrolysis resistance of the base material can be significantly improved, and examples 5 and 6 containing phosphorus antioxidants can obviously improve the thermal oxygen resistance of the base material.

Embodiment 7-12

[0077] The operation of the comparative example was repeated, and the compositions listed in Table 3 were used in the formulations of Examples 7-12, and the measured values ​​of the corresponding physical properties were also listed in Table 3.

[0078] table 3

[0079] Implementation column

7

8

9

10

11

12

Composition

A01

45

45

27

A02

43

15

28

8

A03

45

35

B01

45

15

8

27

[0080] B02

38

35

B03

43

38

28

C101

1

1

1.5

1.5

0.5

0.5

C201

0.5

0.5

0.3

0.3

1

1

C301

0.5

0.5

0.2

0.2

0.5

0.5

physical properties

Tensile strength (MPa)

58.6

22.1

45.6

18.6

47.5

15.6

Elongation at break (%)

35

583

...

Embodiment 17-18

[0088] Examples 17-18 can be used for injection molding;

[0089] Examples 19-20 can be used for spinning.

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PUM

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Abstract

The invention discloses a biodegradable resin composition. The composition consists of the following raw materials in part by weight: 95.0 to 99.9 parts of biodegradable homopolyester and biodegradable copolyester and 0.1 to 5.0 parts of auxiliary agent for controlling performance ageing rate, wherein a mass ratio of the biodegradable homopolyester to the biodegradable copolyester is 1:9-9:1; andthe auxiliary agent for controlling the performance ageing rate is a mixture of a chain extender, an anti-hydrolysis agent and an antioxidant. A preparation method of the biodegradable resin composition comprises the following steps of: mixing the raw materials according to a proportion, drying, stirring and extruding. The biodegradable resin composition has moderate biodegradation rate and high physical property and processability; the composition is properly adjusted according to different using requirements to meet various application fields of blow molding, extrusion, injection, spinning forming and the like; and the composition has a longer using or storage period under the usual application condition, and even can be applied to a high-temperature high-humidity application environment.

Description

technical field [0001] The invention relates to a biodegradable resin composition, in particular to a biodegradable resin composition with controlled degradation speed. Background technique [0002] General-purpose plastics are widely used in various fields due to their excellent comprehensive properties. They are listed as the four major support materials along with steel, wood, and cement, and their annual usage continues to rise. General-purpose plastics such as polyethylene (PE), polypropylene (PP) and polystyrene (PS) can exist stably in nature for a long time and are difficult to degrade. Therefore, they are difficult to recycle after they are discarded, causing serious pollution to the environment. Biodegradable plastics have become one of the effective ways to solve the problem of plastic waste environmental pollution because of their rapid degradation in the natural environment, which has attracted people's attention, and countries all over the world are competing t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00C08L67/04C08L67/02C08K5/524C08K5/526C08K5/5333C08K3/32D01F8/14D01F1/10
Inventor 焦建徐依斌苑仁旭钟宇科曾祥斌蔡彤旻夏世勇袁志敏
Owner KINGFA SCI & TECH CO LTD
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