Repairing method for damaged polyurethane material

A polyurethane material and repair method technology, which is applied in the field of self-repair of damaged polyurethane materials, can solve problems such as affecting normal use and increasing thickness, and achieve the effect of recovery performance, good performance and high healing rate

Inactive Publication Date: 2015-06-24
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After the repair, the bonding position is obvious,

Method used

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  • Repairing method for damaged polyurethane material
  • Repairing method for damaged polyurethane material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Synthesize the polyurethane repair agent that chitosan is embedded with oxetane according to the following steps:

[0018] (1) Add 2 g of chitosan into a three-neck flask containing 150 mL of NaOH solution with a concentration of 1 mol / L, stir at 0°C for 30 h to obtain deacetylated chitosan, and refrigerate at 0°C for 48 h.

[0019] (2) Thaw the deacetylated chitosan refrigerated in step (1) and mix it with 150 mL of cooled isopropanol, stir for 1 hour, add 0.15 g of cooled 3-chloromethyl-3-methyloxetane The mass ratio of alkanes, chitosan and 3-chloromethyl-3-methyloxetane is 1:0.075, heat up to 80°C, stir for 12 hours until the reaction is complete, filter, wash with methanol until the mixture is medium properties, dried at 60°C for 12 hours to obtain chitosan monomer embedded with oxetane;

[0020] (3) The chitosan monomer embedded with oxetane obtained in step (2) is dispersed in 120 mL of dimethyl sulfoxide solution, ultrasonically treated at 25° C. for 12 hours, ...

Embodiment 2

[0023] The method for repairing the damaged polyurethane material in this embodiment is to adjust the ultraviolet light irradiation time to 20 minutes, and other operations are the same as in embodiment 1 to realize the self-repairing of the polyurethane material.

Embodiment 3

[0025] The method for repairing the damaged polyurethane material in this embodiment is to adjust the ultraviolet light irradiation time to 40 minutes, and other operations are the same as in embodiment 1 to realize the self-repairing of the polyurethane material.

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Abstract

The invention relates to a repairing method for a damaged polyurethane material. The repairing method is characterized in that a repairing agent for a polyurethane network structure embedded with oxetane chitosan is coated on a damaged part of the polyurethane material, and the damaged polyurethane material is irradiated by ultraviolet light for 20-40 minutes to complete the self-repair of the polyurethane material. The repairing method disclosed by the invention can make up a gap of a polyurethane crack, is relatively high in healing rate and capable of repairing the performances of the material better.

Description

technical field [0001] The invention belongs to the technical field of polyurethane material crack repair research, and in particular relates to a method for realizing the self-repair of damaged polyurethane material under the condition of ultraviolet light irradiation. Background technique [0002] Polyurethane has high strength, wear resistance, tear resistance, good bending performance and excellent processing performance, and its oil resistance and water resistance are extremely excellent. In recent years, as an emerging organic polymer material, it has been widely used in many fields of the national economy because of its excellent performance. The product application fields involve light industry, chemical industry, electronics, textile, medical treatment, construction, building materials, automobile, national defense, aerospace, aviation, etc., and is known as the "fifth largest plastic". [0003] Due to a wide range of applications and different use environments, po...

Claims

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Application Information

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IPC IPC(8): C08J7/12C08J7/04C08G18/73C08G18/48C08G18/64C08B37/08
Inventor 李蕊周天澍陈佳奇王鹏志陈旭
Owner CHANGAN UNIV
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