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A kind of polyurethane foam with rice husk as raw material and preparation method thereof

A technology of foamed plastics and polyurethane, applied in the field of polyurethane foamed plastics and its preparation, to achieve the effects of simplifying the liquefaction process, excellent cushioning and energy absorption performance, and reducing energy consumption

Inactive Publication Date: 2016-06-22
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a formula and preparation method for making polyurethane foam with rice husk instead of petrochemical raw materials, so as to overcome the dependence of existing polyurethane foam on petrochemical raw materials and improve the utilization rate of rice husk

Method used

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  • A kind of polyurethane foam with rice husk as raw material and preparation method thereof
  • A kind of polyurethane foam with rice husk as raw material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Take 60-mesh rice husk powder, puff it through microwave irradiation, and treat it in an oven at 110°C to 130°C for 2 hours;

[0040] Add 80 parts of polyethylene glycol with a molecular weight of 400, 10 parts of ethylene glycol, 10 parts of glycerin, and 0.25 parts of Tween-80 into the reaction vessel, and then add 25 parts of rice husk powder with a particle size of 60 meshes. Heat up to 190°C at a stirring speed of 300rpm, then slowly add 3 parts of concentrated sulfuric acid dropwise within 5min, react for 100min, stop heating, take out the reaction kettle, and then put the crude rice husk liquefaction product in the above reaction kettle in a vacuum oven at 110℃ Vacuum drying was carried out for 24 hours to obtain rice husk liquefaction, the mass percentage of water was 0.497% after testing, and the contained water could be used as foaming agent.

[0041]Take 42.45 parts of the above-mentioned rice husk liquefied product, then add 2.12 parts of silicone oil AK8807...

Embodiment 2

[0043] The rest of this example is the same as that of Example 1, the difference is: filter the crude rice husk liquefaction product with 2 layers of gauze, then filter the liquid substance with fast filter paper, and then put the liquid product into a vacuum oven at 110°C for vacuum After drying for 24 hours, the liquefied rice husk was obtained. Take 39.19 parts of the above-mentioned rice husk liquefaction, then add 1.96 parts of silicone oil AK8807, 0.54 parts of stannous octoate and 1.57 parts of glycerin, stir it under the mixer at a speed of 500 rpm for 3 minutes to form a resin mixture, adjust the temperature of the resin mixture to 25°C, and then add 56.74 parts of PAPI with a temperature of 25°C to prepare a density of 0.16g / cm 3 rigid polyurethane foam.

Embodiment 3

[0045] Others of this embodiment are the same as those of Example 1, the difference being that first the crude product of rice husk liquefaction is treated with 2mol / L of NaHCO 3 Aqueous solution neutralization treatment, stop dropping when the pH of the liquefied product is 7.0, then filter the neutralized liquefied product with gauze once, then filter the liquid material with fast filter paper, and finally put the liquid product in a vacuum oven at 110°C vacuum drying for 48 hours to obtain rice husk liquefaction. Take 39.38 parts of the rice husk liquefaction, then add 1.97 parts of silicone oil AK8807, 0.012 parts of stannous octoate and 1.57 parts of glycerol, stir it under the mixer at a speed of 500 rpm for 3 minutes to form a resin mixture, adjust the temperature of the resin mixture to 25°C, and then add 57.07 parts of PAPI with a temperature of 25°C to prepare a density of 0.15g / cm 3 rigid polyurethane foam.

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Abstract

The invention provides a polyurethane foam with rice husk as raw material and a preparation method thereof. The foam formulation includes: 100-190 parts of rice husk, 100-150 parts of isocyanate, 0.5-5 parts of chain-extending cross-linking agent, 2-5 parts of foam stabilizer, 0.01-3 parts of catalyst, and 0-10 parts of foaming agent. The preparation method of the foamed plastics comprises the steps of: first preparing rice husk liquefaction from rice husk powder with polyethylene glycol, ethylene glycol and glycerin, and then adding chain-extending cross-linking agent, catalyst, foam stabilizer, isocyanate , after mixing evenly, mold pouring, sealing, aging, cooling and demoulding, to obtain the required. The invention uses rice husks to prepare polyurethane foams, which improves the utilization rate of rice husks and reduces the production cost of polyurethane foams; the polyurethane foams of the invention have good buffering and energy-absorbing performance, thermal insulation performance and degradable performance, It can be used to make packaging, shock-absorbing cushioning materials, and thermal insulation materials.

Description

technical field [0001] The invention relates to a polyurethane foam and a preparation method thereof, in particular to a polyurethane foam using rice husk as a raw material and a preparation method thereof. Background technique [0002] Since the 1980s, energy, materials and the environment have become three major issues with the characteristics of the times. Polyurethane foam (PUF) plastics are widely used as heat insulation and cushioning packaging materials due to their excellent properties such as light weight, heat insulation, sound insulation, and vibration reduction. Since the 1950s, with the rapid development of the petroleum industry and the chemical industry, the source of raw materials for the polyurethane industry has been enriched, and the development of the polyurethane industry has been greatly promoted. However, with the progress and development of society, oil resources, which are an important pillar of world economic development, will be exhausted day by d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/64C08G18/08C08G101/00
Inventor 田春蓉黄玉西王建华梁书恩林晓艳
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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