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Lignin-containing environment-friendly polyurethane elastomer and preparation method thereof

An environmentally friendly polyurethane elastomer technology, applied in the field of elastomers, can solve the problems of environmental pollution, high cost of polyester polyurethane elastomers, and non-environmental formulations, and achieve the goals of simple operation, reduced labor consumption, and increased use value Effect

Active Publication Date: 2019-08-30
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems that the polyester polyurethane elastomer prepared by the existing method has high cost, the formula is not environmentally friendly, and is prone to pollute the environment, and provides an environment-friendly polyurethane elastomer containing lignin and a preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0018] Specific Embodiment 1: In this embodiment, an environmentally friendly polyurethane elastomer containing lignin consists of 100 parts by weight of liquid polyester polyol containing lignin, 10 parts to 20 parts of chain extender and 40 parts to 65 parts Parts of isocyanate are prepared; the chain extender is a mixture of lignin and ethylene glycol, and the mass ratio of ethylene glycol to lignin in the chain extender is 1:(0.1~0.4);

[0019] The lignin-containing liquid polyester polyol consists of 15 parts to 25 parts of lignin, 1 part to 2 parts of catalyst A, 1 part to 2 parts of catalyst B, 40 parts to 60 parts of glycol and 100 parts by weight in parts by weight. The catalyst A is methanesulfonic acid; the catalyst B is dibutyltin dilaurate; the dibasic alcohol is 2,2-dimethyl-1,3 -The mixture of propylene glycol, 1,4-butanediol and ethylene glycol, the mol ratio of 2,2-dimethyl-1,3-propanediol and 1,4-butanediol in the dibasic alcohol is 1: (0.1~0.2), the molar r...

specific Embodiment approach 2

[0024] Embodiment 2: This embodiment is different from Embodiment 1 in that: the lignin is corn stalk lignin. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0025] Embodiment 3: This embodiment is different from Embodiment 1 or Embodiment 2 in that: the aliphatic dibasic acid is sebacic acid. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a lignin-containing environment-friendly polyurethane elastomer and a preparation method thereof, relating to the field of elastomers. The invention aims to solve the problemsthat the polyester polyurethane elastomer prepared by a prior method is high in cost, the formulation is not environmentally friendly, and the environment is easily polluted. The lignin-containing environment-friendly polyurethane elastomer is prepared from a lignin-containing liquid polyester polyol, a chain extender, and an isocyanate. The preparation method comprises the following steps: preparing lignin-containing liquid polyester polyol by using lignin, a catalyst A, a catalyst B, glycol and aliphatic dibasic acid; sequentially adding the isocyanate and the chain extender into the lignin-containing liquid polyester polyol, mixing, defoaming by using a vacuum defoaming device, pouring into a mold after defoaming, and placing in an oven for aging. The invention is used for preparation of lignin-containing environment-friendly polyurethane elastomer.

Description

technical field [0001] The present invention relates to the field of elastomers. Background technique [0002] As a relatively important resource in national materials, polyurethane elastomer plays an irreplaceable role in our production and life due to its excellent performance characteristics such as high strength, good elasticity, wide range of hardness, and convenient molding. Polyurethane elastomer structure design is relatively flexible, the most widely used. However, most elastomers have the disadvantages of high cost, not easy to degrade, and easy to cause soil degradation and air pollution when disposing of waste. Therefore, looking for biomass resource materials to improve the shortcomings of elastomers has become the focus of attention. [0003] Lignin is ubiquitous in the plant kingdom and is the second largest biomass resource after cellulose. It is also the only polyphenolic natural polymer that provides aromatic groups in plant resources. The structure of li...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/65C08G18/10C08G18/32C08G18/42C08G18/64
CPCC08G18/10C08G18/3206C08G18/4238C08G18/6492C08G18/664C08G18/6511
Inventor 邸明伟孙楠
Owner NORTHEAST FORESTRY UNIVERSITY