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Bio-based cross-linked recyclable polyurethane composite material and preparation method thereof

A polyurethane combination material and bio-based technology, applied in the field of polymer materials, can solve the problems of polyurethane losing fluidity and inability to perform process operations, etc.

Active Publication Date: 2020-10-23
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the high activity of the isocyanate component of the polyurethane resin, once it is evenly mixed with the polyol or polyamine component, it will gel and solidify within a few seconds to several hours, causing the polyurethane to lose its fluidity and cannot be processed. To some extent, the application of polyurethane is limited

Method used

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  • Bio-based cross-linked recyclable polyurethane composite material and preparation method thereof
  • Bio-based cross-linked recyclable polyurethane composite material and preparation method thereof
  • Bio-based cross-linked recyclable polyurethane composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Preparation of component A: Prepare by feeding MDI-50, PEG-600 and ethyl furanamine at a molar ratio of 2:2:1, stirring and reacting at 75°C for 3 hours;

[0055] Preparation of component B: Feed itaconic acid and FA1 at a molar ratio of 1:2, add 0.1% concentrated sulfuric acid in total mass, react at 105°C for 4 hours, and then distill and dehydrate to obtain it;

[0056] Mix and heat components A and B at 120°C in a molar ratio of 1:1, stir evenly, and cure at 70°C for 20 hours to obtain recyclable polyurethane. The test properties are shown in Table 1.

Embodiment 2

[0058] Preparation of component A: Prepare by feeding MDI-50, PTMG-650 and ethyl furanamine in a molar ratio of 2:2:1.2, stirring and reacting at 80°C for 2 hours;

[0059] Preparation of component B: Feed itaconic acid and FM2D at a molar ratio of 1:2, add 0.2% concentrated sulfuric acid in total mass, react at 110°C for 4 hours, and then distill and dehydrate to obtain it;

[0060] Mix and heat components A and B at 120°C in a molar ratio of 1.2:1, stir evenly, and cure at 70°C for 16 hours to obtain recyclable polyurethane. The test properties are shown in Table 1.

Embodiment 3

[0062] Preparation of component A: TDI-100, PCL 210N and ethyl furanamine are prepared according to the molar ratio of 2:2:1.1, stirred and reacted at 80°C for 4 hours;

[0063] Preparation of component B: Feed itaconic acid and FM1 at a molar ratio of 1.1:2, add 0.1% concentrated sulfuric acid to the total mass, react at 100°C for 5 hours, and then distill and dehydrate to obtain it;

[0064] Mix and heat components A and B at 110°C in a molar ratio of 1.1:1, stir evenly, and cure at 70°C for 18 hours to obtain recyclable polyurethane. The test properties are shown in Table 1.

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Abstract

The invention discloses a bio-based cross-linked recyclable polyurethane composite material and a preparation method thereof. The bio-based cross-linked recyclable polyurethane composite material is prepared from a polyurethane prepolymer containing a diene structure and a bio-based modified polyester cross-linking agent. The polyurethane material is cured through a diene addition reaction, a forward-reversible reaction of a chemical bond is achieved through temperature stimulation, flowing and non-curing at 110-130 DEG C are achieved, curing is achieved at 60-70 DEG C, and the polyurethane material can be recycled after being heated.

Description

technical field [0001] The invention belongs to the field of macromolecular materials, and in particular relates to a polyurethane composite material that can flow at high temperature, solidify at 70°C, and be bio-based cross-linked and recyclable, and a preparation method. Background technique [0002] As a polymer material, polyurethane can be used to prepare products with various performance requirements, and has excellent toughness, impact resistance, abrasion resistance, and tear resistance. The processing and molding process of polyurethane is simple, one-time injection molding and one-time pouring molding can be used, and different curing processes and properties can be realized through formula design. [0003] Due to the high activity of the isocyanate component of the polyurethane resin, once it is evenly mixed with the polyol or polyamine component, it will gel and solidify within a few seconds to several hours, causing the polyurethane to lose its fluidity and can...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/42C08G18/38C08G18/12C08G18/68C08G63/91
CPCC08G18/7614C08G18/7671C08G18/6633C08G18/6666C08G18/4854C08G18/4825C08G18/4277C08G18/2865C08G18/12C08G63/912C08G18/68
Inventor 巴龙翰高彦升王凯
Owner WANHUA CHEM GRP CO LTD
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