Modified PGA material with relatively long shelf life and preparation method thereof

A shelf life and modification technology, which is applied in the field of modified PGA materials and its preparation, can solve the problems of affecting product quality, high density of ester groups, and difficulty in controlling the degradation speed.
CN112679927APending Publication Date: 2021-04-20HAINAN SHINER IND
13 Cites 2 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HAINAN SHINER IND
Publication Date
2021-04-20

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a modified PGA material with long shelf life and a preparation method thereof. The modified PGA material is prepared from, by weight, 0.2-0.5 part of a chain extender, 70-80 parts of polyglycolic acid, 15-30 parts of filler and 1-5 parts of an anti-blocking agent, wherein the molecular weight of the polyglycolic acid is 100,000-300,000 g / mol, and the melting point of the polyglycolic acid is 200-220 DEG C; the anti-blocking agent is nano silicon dioxide with the specific surface area of less than 200 m<2> / g, the pH value is 3.8-4.3, and the water content is lower than 2%; and the chain extender is a mixture of an epoxy chain extender and sebacic acid dibenzoyl hydrazine. According to the invention, the specific polyglycolic acid is modified by adopting the chain extender and the anti-blocking agent, so that the modified PGA material has a relatively long shelf life; the tensile property and the stiffness are better; the shelf life can reach up to 6 months; the tensile strength is 31 to 33 MPa; the elongation at break is 9.5 to 10 percent; and the stiffness is 1.5 to 2 N.m.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of PGA modified materials, and in particular relates to a modified PGA material with a relatively high shelf life and a preparation method thereof. Background technique

[0002] PGA (polyglycolic acid), also known as polyglycolide, is a fully biodegradable polymer with the shortest segment structure known so far. Due to the shortest repeating unit in its molecular structure, it is the fastest degradation rate among aliphatic polyester materials, and it can achieve complete and rapid biodegradation even in seawater.

[0003] However, everything has their two sides. Because the repeating unit of the PGA material itself is too short and the density of the ester group is too high, its degradation rate is difficult to control. After industrial production, the shelf life is often very short, and various problems often occur in the process of consumer use, seriously affecting the product. quality. Contents of t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More