Composite polyurethane foam sheet produced by using hard foam wastes, and preparation method thereof

A composite polyurethane and rigid foam technology, applied in the field of composite polyurethane foam boards, can solve the problems of rigid foam without suitable treatment methods, limited types of recycled materials, and unsuitable for large-scale use, etc., to achieve low density and high utilization rate , The effect of short production cycle

Inactive Publication Date: 2015-08-12
TIANJIN DALIN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used methods for processing recycled materials include bonding and pressure molding, filling (light aggregate used as building materials), extrusion molding, and chemical recycling. These methods have high requirements for equipment and high energy consumption. The types of materials suitable for recycling are limited and not suitable for large-scale use
If it is directly burned or landfilled, it will inevitably cause air and soil pollution
Patent 200910232399.5 proposes a method of using cross-linked polyvinyl chloride foam to prepare composite foam sheets, but there is no suitable treatment method for other types of rigid foam

Method used

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  • Composite polyurethane foam sheet produced by using hard foam wastes, and preparation method thereof
  • Composite polyurethane foam sheet produced by using hard foam wastes, and preparation method thereof
  • Composite polyurethane foam sheet produced by using hard foam wastes, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Crush the rigid polyurethane foam board into blocks and granules, the maximum size of which does not exceed 55cm, and put 30 kg of waste blocks and granules of different sizes into a mold with a size of 1.1m x 1.1m x 0.6m to ensure the presence of fillers There must be a certain gap, and the height cannot exceed the height of the mold. Weigh 100 parts by weight of diphenylmethane diisocyanate (MDI), 100 parts by weight of polyether polyol compound, 4 parts by weight of water and 1 part by weight of organotin compound, place in a mechanical stirrer and stir evenly, and the mixed solution is Fill the mold in the form of spray within 300s to ensure that the mixed liquid can completely fill the waste void. Then seal the mold, control the mold temperature at 20-40°C, and remove the mold after 20 minutes to obtain a composite polyurethane foam block with a block weight of 36 kilograms. The block can then be cut into slabs or other shaped products. The leftovers produced can...

Embodiment 2

[0033] Crush polystyrene foam boards into blocks and granules, the maximum size of which does not exceed 55cm, and put 16 kg of waste blocks and granules of different sizes into a mold with a size of 1.1m×1.1m×0.6m to ensure the presence of fillers There must be a certain gap, and the height cannot exceed the height of the mold. Weigh 130 parts by weight of polymethylene polyphenyl isocyanate, 100 parts by weight of polyether polyol compound, 4 parts by weight of surfactant, 4 parts by weight of water, 1 part by weight of organotin compound and 8 parts by weight of ten A mixture of brominated diphenylethane and antimony trioxide (the weight ratio of decabromodiphenylethane to antimony trioxide is 3:1), placed in a mechanical stirrer and stirred evenly, and the mixture was sprayed within 120s Fill the mold to ensure that the mixture can completely fill the waste voids. Then seal the mold, control the mold temperature at 20-40°C, and remove the mold after 20 minutes to obtain a...

Embodiment 3

[0035] Crush the rigid polyurethane foam board into blocks and granules, the maximum size of which does not exceed 55cm, and put 30 kg of waste blocks and granules of different sizes into a mold with a size of 1.1m x 1.1m x 0.6m to ensure the presence of fillers There must be a certain gap, and the height cannot exceed the height of the mold. Weigh 75 parts by weight of polymethylene polyphenyl isocyanate, 100 parts by weight of polyether polyol compound, 4 parts by weight of water, 1 part by weight of organotin compound, 4 parts by weight of surfactant, 3 parts by weight of carbon The black powder and 2 parts by mass of antioxidant 1010 were placed in a mechanical stirrer and stirred evenly, and the mixed solution was filled into the mold in the form of spray within 120s to ensure that the mixed solution could completely fill the waste voids. Then seal the mold, control the mold temperature at 20-40°C, and remove the mold after 20 minutes to obtain a composite polyurethane fo...

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Abstract

The invention provides a composite polyurethane foam sheet produced by using hard foam wastes. The sheet is prepared from, by weight, 60-150 parts of isocyanate, 100 parts of a polyol compound, 0.1-2 parts of a catalyst, 1-5 parts of a foaming agent, and hard foam wastes accounting for 60-90% of the total mass of raw materials. The sheet has the advantages of high utilization rate of the hard foam wastes, low energy consumption in the production process, provision of a new way for repeated utilization of the hard foam wastes, energy and material saving, and no influences on environment.

Description

technical field [0001] The invention relates to the reuse of rigid foam waste, in particular to a composite polyurethane foam plate prepared by using the rigid foam waste as filler and filling polyurethane foam. Background technique [0002] At present, the demand for rigid foam in the fields of heat insulation materials, packaging materials, sound insulation and shock resistance is gradually increasing, but the problem of the difficulty in recycling recycled materials and leftover materials is also in front of people. At present, the commonly used methods for processing recycled materials include bonding and pressure molding, filler (light aggregate used as building materials), extrusion molding and chemical recycling. These methods have high requirements for equipment and high energy consumption. The types of materials that are suitable for recycling are limited and not suitable for large-scale use. If it is directly burned or landfilled, it will inevitably cause air and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08L75/08C08L75/04C08L25/06C08L61/06C08L25/12C08L81/06C08L71/12C08L69/00C08L63/00C08J9/06C08G18/42C08G18/48C08G18/76
Inventor 闫达吴敬元刘宗山
Owner TIANJIN DALIN NEW MATERIAL TECH
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