Biodegradable resin composition and product thereof

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...

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