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Soft reticulated polyurethane composite material and preparation method thereof

A composite material and polyurethane technology, applied in the field of polyurethane materials, can solve the problems of low flame retardant performance, poor aging resistance, and inability to achieve, and achieve the effects of avoiding direct irradiation, improving flame retardancy, and improving aging resistance.

Inactive Publication Date: 2016-08-24
DONGGUAN ZHONGRUI HIGH POLYMER MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, it is reflected in: its flame retardant grade cannot meet the British furniture industry material flame retardant test standard BS5852, nor can it meet the electronic and electrical industry UL94HF-1 level standard; because the flame retardants added to soft polyurethane materials mainly include phosphorus, halogen The flame retardant mechanism of the phosphorus system and the nitrogen system is respectively: the phosphorus system forms a pyrophosphate protective layer on the surface of the material to prevent combustion; the halogen and nitrogen system flame retardants are decomposed when the polyurethane is burned, and form a denser flame retardant on the surface of the material. The large gas protective layer of hydrogen halide and hydrogen nitride isolates the air, thus playing a role of flame retardancy; after the soft polyurethane material is produced into a mesh material, its flame retardancy is greatly lower due to its good air permeability , its flame retardant grade cannot meet the British standard BS5852 standard
On the other hand, it is reflected in: because the soft network polyurethane material itself contains a benzene ring structure, when it is irradiated by ultraviolet light or heated in an aerobic environment, the benzene ring will form a chromophoric group, mainly the amino group on the benzene ring. The ester group breaks and oxidizes into a phenylcycloimine structure, thereby undergoing cracking and differentiation, so the aging resistance is poor

Method used

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  • Soft reticulated polyurethane composite material and preparation method thereof

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preparation example Construction

[0044] The preparation method of soft reticular polyurethane composite material of the present invention comprises the following steps:

[0045] Pretreatment of soft reticulated polyurethane aimed at increasing its surface adhesion;

[0046] Covering the raw material of the silica gel material with the soft reticular polyurethane, and prepolymerizing the raw material of the silica gel material to obtain a prepolymer composite material;

[0047] Vulcanizing the prepolymer composite

[0048] The above-mentioned pretreatment aimed at increasing its surface adhesion can be as follows: polyethylene glycol is applied to the surface of the polyurethane product, and then the polyurethane product applied with polyethylene glycol is placed in a plasma generating device for plasma gas surface modification. For permanent treatment, set the power of the plasma generator to 10-1500w, and the treatment time is 0.5-120min, and then wash the polyurethane products that have undergone plasma ga...

Embodiment 1

[0052] The preparation method of soft reticular polyurethane composite material of the present invention comprises the following steps:

[0053] (1), the prepared soft reticular polyurethane material is processed, the treatment includes desulfurization, deodorization and pretreatment aimed at improving the surface adhesion of the soft reticular polyurethane material);

[0054] (2), preparing silicone rubber for compounding (place 70 parts of silica gel, 10 parts of flame retardant, 1 part of catalyst, 1 part of adhesive and 0.2 part of defoamer in a premixed reactor and mix well);

[0055] (3) Pump the silicone rubber material mixed in the reaction kettle into the trough of the compound equipment, and enter the soft mesh polyurethane material through the entrance of the compound equipment, so that the silicone rubber material is evenly and completely compounded (surface covered) on the mesh on polyurethane material;

[0056] (4) Prepolymerize the compounded product for 2 hour...

Embodiment 2

[0059] (1), the prepared soft reticular polyurethane material is processed, the treatment includes desulfurization, deodorization and pretreatment aimed at improving the surface adhesion of the soft reticular polyurethane material);

[0060] (2), preparing silicone rubber for compounding (place 90 parts of silica gel, 20 parts of flame retardant, 2 parts of catalyst, 3 parts of adhesive and 0.8 part of defoamer in a premixed reactor and mix well);

[0061] (3) Pump the silicone rubber material mixed in the reaction kettle into the trough of the compound equipment, and enter the soft mesh polyurethane material through the entrance of the compound equipment, so that the silicone rubber material is evenly and completely compounded (surface covered) on the mesh on polyurethane material;

[0062] (4), pre-polymerize the compounded product for 6 hours according to the characteristic requirements;

[0063] (5) Finally, it enters the vulcanization equipment, and a new type of composi...

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Abstract

The invention discloses a soft reticulated polyurethane composite material and a preparation method thereof. The soft reticulated polyurethane composite material comprises reticulated polyurethane and a silicon rubber material. The silicon rubber material comprises, by weight, 70-90 parts of silicon rubber, 10-20 parts of flame retardant and 1-2 parts of catalysts. Due to the fact that raw materials of the soft reticulated polyurethane composite material include the silicon rubber material, on the one hand, silicon dioxide is generated in combustion of the silicon rubber material, and a ceramic layer composed of carbon, silicon and oxygen elements can be formed on the surface of the material to play a role in heat insulation and transferring in exchange of combustible gas with oxygen, so that flame retardation is improved; on the other hand, the silicon rubber material has a stable silicon-oxygen chemical structure and endows the material with unique and excellent weatherability, and after the soft polyurethane material is wrapped and prevented from contacting with air, oxygen isolation is realized while direct ultraviolet irradiation is avoided, so that ageing resistance is improved.

Description

technical field [0001] The invention relates to the technical field of polyurethane materials, in particular to a soft reticular polyurethane composite material and a preparation method thereof. Background technique [0002] Soft mesh polyurethane material has good elasticity and water permeability, and is used in outdoor furniture, electrical appliances, air and water filtration, etc. [0003] The known soft reticular polyurethane material mainly has two technical defects. On the one hand, it is reflected in: its flame retardant grade cannot meet the British furniture industry material flame retardant test standard BS5852, nor can it meet the electronic and electrical industry UL94HF-1 level standard; because the flame retardants added to soft polyurethane materials mainly include phosphorus, halogen The flame retardant mechanism of the phosphorus system and the nitrogen system is respectively: the phosphorus system forms a pyrophosphate protective layer on the surface of ...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08L83/04C08L5/08C08K13/02C08K3/22C08K5/5435C08K5/19
CPCC08L75/04C08L2201/02C08L2203/14C08L2205/03C08L83/04C08L5/08C08K13/02C08K2003/2227C08K2003/2224C08K5/5435C08K5/19C08K3/22
Inventor 李晓春
Owner DONGGUAN ZHONGRUI HIGH POLYMER MATERIAL CO LTD
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