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Nanometer montmorillonite-soft polyurethane foam plastic and its preparation process

A technology of flexible foam plastic and nano-montmorillonite, which is applied in the field of polymer materials, can solve the problems of environmental hazards, harm, and high production costs, and achieve the effects of eliminating environmental hazards, reducing costs, and being easy to operate.

Inactive Publication Date: 2008-03-26
邱连生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, among the raw materials used in the production of grafted polyether, acrylocyanide is a highly toxic substance, styrene, azobisisobutylcyanide and other initiators are all toxic substances, which will have different degrees of harm to the human body during the production process and use process. Hazards, especially the blowing agent used is Freon 11, which can cause great harm to the environment, and the production cost is high

Method used

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  • Nanometer montmorillonite-soft polyurethane foam plastic and its preparation process
  • Nanometer montmorillonite-soft polyurethane foam plastic and its preparation process
  • Nanometer montmorillonite-soft polyurethane foam plastic and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Embodiment 1: To make a car seat cushion, the seat cushion mold is heated to 35° C. for subsequent use.

[0008] First, the nano-montmorillonite with 5 parts by weight and the polyether polyol with 95 parts by weight are placed in the same container and stirred and compounded; the mixed catalyst with 0-4 parts by weight is added, and then the parts by weight are added. 1-5 foaming agent-water, 1-3 parts by weight of foam stabilizer, and then fully stirred and mixed to prepare a combined polyether; finally, add isocyanate with an NCO index of 1, and stir. The stirring speed is 4000 rpm, the stirring time is 7 seconds, and then poured into the mold; the ambient temperature is 15°C, the material temperature is 22°C, the mold temperature is 35°C, the curing temperature is 70°C, and the curing time is 10 minutes. After molding, it can form a highly elastic flexible polyurethane foam.

Embodiment 2

[0009] Embodiment 2: To make a sofa seat cushion, heat the seat cushion mold to 50° C. for later use.

[0010] First, the nano-montmorillonite with 40 parts by weight and the polyether polyol with 60 parts by weight are put into the same container for stirring and compounding; the catalyst with 0-4 parts by weight is added, and the 5 foaming agent-water, 1-3 parts by weight of a foam stabilizer, and then fully stirred and mixed to prepare a combined polyether; finally, add isocyanate with an NCO index of 1.2, and stir. The stirring speed is 5000 rpm, the stirring time is 15 seconds, and then poured into the mold; the ambient temperature is 20°C, the material temperature is 25°C, the mold temperature is 50°C, the curing temperature is 120°C, and the curing time is 15 minutes. After molding, it can form a highly elastic flexible polyurethane foam.

Embodiment 3

[0011] Embodiment 3: To make a soft handrail, heat the mold to 40°C for later use.

[0012] First, put 20 parts by weight of nano-montmorillonite and polyether polyols of 80 parts by weight into the same container and stir and compound; add catalysts with parts by weight of 0-4, and then add 1 -5 foaming agent-water, foam stabilizer with a weight of 2, and then fully stirred and mixed to prepare a composite polyether; finally, add an isocyanate with an index of 1, and stir. The stirring speed is 4500 rpm, the stirring time is 10 seconds, and then poured into the mold; the ambient temperature is 18°C, the material temperature is 24°C, the mold temperature is 40°C, the curing temperature is 100°C, and the curing time is 12 minutes. After molding, it can form a highly elastic flexible polyurethane foam.

[0013] The following table is a comparison of several raw materials and their respective formulas, after foaming with the same auxiliary material and the same process parameter...

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Abstract

The soft nanometer montmorillonite-polyurethane foam plastic consists of nanometer montmorillonite 5-40 wt% and polyether polyol 60-95 wt%. The preparation process includes mixing nanometer montmorillonite and polyether polyol in some container; adding catalyst, foaming agent and foam homogenizing agent successively, and mixing to constitute composite polyether; adding isocyanate with NCO index of 1-1.2 via stirring at 4000-5000 rpm for 7-15 sec, curing at 70-120 deg.c for 10-15 min and reaction with isocyanate, and other steps. The soft nanometer montmorillonite-polyurethane foam plastic is soft, has high rebound elasticity, good wet ageing performance and ideal deformation curve, and may be used in replacing soft foamed polyether for fitting with grafted polyether. The preparation process has less environmental pollution.

Description

technical field [0001] The invention belongs to the field of polymer materials, and more specifically relates to a nano-montmorillonite polyurethane flexible foam and a preparation method thereof. Background technique [0002] At present, polyurethane flexible foam plastics are usually made of isocyanate and polyether with a hydroxyl functionality of more than 3 and a molecular weight of 3000-6500 as the main raw material, and a catalyst, foaming agent, and foam stabilizer are added to form a chemical reaction. Foam plastic has the characteristics of soft texture, good resilience, small compression deformation, good wet aging performance, and ideal deformation curve, so the development speed is very fast. Since the first propylene oxide and ethylene oxide were developed by American Wyandot Company in the 1950s, ideal polyurethane flexible foam products have been produced. Especially in the 1970s, high-resilience polyurethane flexible foam was successfully developed and put ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/08C08K3/34C08J9/00
Inventor 邱连生
Owner 邱连生
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