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Polyurethane high resilience foam prepared from recovered recycled polyol as raw material

A polyol and polyurethane technology, applied in the field of polyurethane foam, can solve the problems not mentioned, and achieve the effects of reducing the dosage, good air permeability, and reducing the dosage of expensive catalysts

Inactive Publication Date: 2017-02-08
浙江华江科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent also does not mention the use of recycled liquid for high-resilience foam foaming

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Polyether polyol 330N: 70 parts, polymer polyol KGP524: 10 parts, recycled polyol: 20 parts, catalyst ZF10: 0.3 parts, catalyst A33: 0.7 parts, silicone surfactant: 1.5 parts, water: 6 parts Parts, cross-linking agent triethanolamine: 0.5 parts, no flame retardant added; modified MDI: 72.5 parts.

[0026] The foaming method is as follows: Mix and stir the above-mentioned materials except modified MDI evenly in advance, keep the temperature of the material at 23±2°C, and maintain the temperature of the modified MDI at 23±2°C. After the black and white materials are ready, first pour the modified MDI into the material barrel, then pour the well-stirred white materials and stir at a speed of 1500rpm for 10s, then pour the mixture into the foaming box for free foaming.

[0027] After testing: the foam density is 30kg / m 3 , Rebound rate 57%, tensile strength 91kPa, elongation at break 99%, tear strength 2.3N / cm.

Embodiment 2

[0029] Polyether polyol 330N: 50 parts, polymer polyol KGP524: 20 parts, recycled polyol: 30 parts, catalyst ZF10: 0.1 parts, catalyst A33: 0.3 parts, silicone surfactant: 0.5 parts, water: 2 parts parts, cross-linking agent triethanolamine: 1.5 parts, phosphorus nitrogen-based halogen-free flame retardant: 8 parts; modified MDI: 52.5 parts.

[0030] The foaming method is as follows: Mix and stir the above-mentioned materials except modified MDI evenly in advance, keep the temperature of the material at 23±2°C, and maintain the temperature of the modified MDI at 23±2°C. After the black and white materials are ready, first pour the modified MDI into the material barrel, then pour the well-stirred white materials and stir at a speed of 1500rpm for 10s, then pour the mixture into the foaming box for free foaming.

[0031] After testing: foam density is 68kg / m 3 , rebound rate 61%, tensile strength 168kPa, elongation at break 110%, tear strength 3.5N / cm, horizontal burning speed ...

Embodiment 3

[0033] Polyether polyol 330N: 50 parts, polymer polyol KGP524: 30 parts, recycled polyol: 20 parts, catalyst ZF10: 0.3 parts, catalyst A33: 0.6 parts, silicone surfactant: 0.8 parts, water: 3.5 parts parts, cross-linking agent triethanolamine: 0.8 parts, phosphorus nitrogen-based halogen-free flame retardant: 3 parts; modified MDI: 42.5 parts.

[0034] The foaming method is as follows: Mix and stir the above-mentioned materials except modified MDI evenly in advance, keep the temperature of the material at 23±2°C, and maintain the temperature of the modified MDI at 23±2°C. Use a high-pressure foaming machine to inject the white material and black material into the mold in proportion (2.5:1) for molding and foaming (the surface of the mold is sprayed with a release agent in advance), and the mold is demoulded after 90 seconds.

[0035] After testing: the foam density is 72kg / m 3 , 65% rebound rate, 165kPa tensile strength, 116% elongation at break, tear strength 3.7N / cm.

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Abstract

The invention discloses a method for preparing polyurethane high resilience foam from recovered recycled polyol as a raw material. The polyurethane high resilience foam comprises a white material and a black material. The white material is a polyether composition and comprises, by mass, 50-70 parts of polyether polyol, 10-30 parts of polymer polyol, 20-30 parts of recovered recycled polyol, 0.4-1 part of a catalyst, 0.5-1.5 parts of a silicone surfactant for foam softening and 2-6 parts of a foaming agent. The black material is polyether-modified MDI. A mass ratio of the white material to the black material is 1.5-2.5: 1. The method creatively utilizes the polyurethane foam alcoholysis recovered liquid as a high resilience foam raw material, realizes cycling use of the raw material in a polyurethane industry and realizes a wide polyurethane foam recovery prospect. The high resilience foam is used for automobile components of a carpet sound insulation pad and a bumper pad block and has good feeling, good permeability, excellent sound absorption performances and a low cost.

Description

technical field [0001] The invention belongs to the field of polyurethane foam plastics, and in particular relates to a method for preparing polyurethane high-resilience foam by using recycled polyol as raw material. Background technique [0002] In 1937, Dr. Otto Bayer and his team in Germany first discovered that polyisocyanate and polyol compound could be polyaddition reaction to produce polyurethane. This invention laid the foundation for the vigorous development of polyurethane industry. There are three types of polyurethane foam products: soft, semi-rigid and rigid foams, and the application fields of different shapes are also very different. Soft foam is mainly used in car seats and carpets, semi-rigid foam is used in car roofs and engine heat insulation pads, and rigid foam is used as insulation materials, such as buildings and refrigerators. [0003] Due to its excellent physical properties and good processability, polyurethane foam is widely used in various indust...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/63C08G18/32C08G18/18C08J9/08C08G101/00
CPCC08G18/18C08G18/3203C08G18/3281C08G18/4072C08G18/4829C08G18/632C08G18/6674C08G18/6688C08G2110/005C08G2110/0058C08G2110/0083Y02P20/584
Inventor 刘国旺楼娣方腾飞周立姚琪马国维
Owner 浙江华江科技股份有限公司
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