Preparation method for polyurethane netted material special for foamed ceramics

A technology of mesh material and ceramic foam, which is applied in the field of polyurethane foam materials, can solve the problems such as the reduction of mechanical strength of polyurethane foam, the difficulty of controlling the uniformity of foam pore size, and the uncontrollable burning time of combustion method, so as to achieve uniform cells and uniform opening , the effect of less reflective film

Inactive Publication Date: 2018-01-12
江西鸿司远特种泡沫材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the degree of meshing is relatively low, it is difficult to completely remove the window film, and it is difficult to control the uniformity of the foam pore size.
The other is the indirect preparation method, which means that on the basis of the synthesis of polyurethane foam, a post-processing process-reticulation is carried out to realize the removal of the foam window film. The indirect preparation method can be divided in

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example one

[0032] A preparation method of special polyurethane mesh material for foam ceramics, which comprises the following steps:

[0033] (1) Prepare the following raw materials: polyether polyol 80g, amine catalyst 0.1g, silicone oil surfactant 0.5g, water 2g, pore opener 1g, tin catalyst 0.1g, TDI 80 / 20 40g;

[0034] (2) Add raw materials other than tin catalyst and TDI 80 / 20 into the container and stir and mix evenly, stir at 3000r / min for 0.5 hours to obtain a mixed solution, and place the mixed solution in a vacuum drying oven at 0.03MPa Evacuate once under pressure and once under 0.07MPa pressure;

[0035] (3) Add a tin catalyst to the mixture obtained in step (2), stir at a speed of 200r / min for 10 seconds, then add TDI 80 / 20, stir at a speed of 500r / min for 20 seconds to obtain a mixture;

[0036] (4) Quickly pour the mixture obtained in step (3) into the mold. Before the mixture is poured into the mold, the mold is pre-coated with a release agent, and hot air is ...

Example Embodiment

[0045] Example two

[0046] A preparation method of special polyurethane mesh material for foam ceramics, which comprises the following steps:

[0047] (1) Prepare raw materials with the following components: 90g polyether polyol, 0.2g amine catalyst, 0.7g silicone oil surfactant, 4g water, 1.5g pore opener, 0.2g tin catalyst, TDI 80 / 20 45g;

[0048] (2) Add the raw materials other than the tin catalyst and TDI 80 / 20 into the container and stir and mix evenly. Stir at 2500r / min for 0.7 hours to obtain the mixed solution. Place the mixed solution in a vacuum drying oven at 0.04MPa Evacuate once under pressure and once under 0.08MPa pressure;

[0049] (3) Add a tin catalyst to the mixture obtained in step (2), stir at a speed of 270r / min for 7 seconds, then add TDI 80 / 20, stir at a speed of 500r / min for 15 seconds to obtain a mixture;

[0050] (4) Quickly pour the mixture obtained in step (3) into the mold. Before the mixture is poured into the mold, the mold is pre-coated with a release...

Example Embodiment

[0059] Example three

[0060] A preparation method of special polyurethane mesh material for foam ceramics, which comprises the following steps:

[0061] (1) Prepare the following raw materials: 100g polyether polyol, 0.3g amine catalyst, 1g silicone oil surfactant, 6g water, 2g pore opener, 0.3g tin catalyst, TDI 80 / 20 50g;

[0062] (2) Add raw materials other than tin catalyst and TDI 80 / 20 into the container, stir and mix evenly, stir at 2500r / min for 1 hour to obtain a mixed solution, and place the mixed solution in a vacuum drying oven at 0.05MPa Evacuate once under pressure and once under 0.09MPa pressure;

[0063] (3) Add a tin catalyst to the mixture obtained in step (2), stir at a speed of 300r / min for 5 seconds, then add TDI 80 / 20, stir at a speed of 600r / min for 10 seconds to obtain a mixture;

[0064] (4) Quickly pour the mixture obtained in step (3) into the mold. Before the mixture is poured into the mold, the mold is pre-coated with a release agent, and hot air is blown ...

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PUM

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Abstract

The invention discloses a preparation method for a polyurethane netted material special for foamed ceramics, relating to the technical field of the polyurethane netted material. The method comprises the following steps: adding polyether polyol, an amines catalyst, a surfactant, a foaming agent and a pore-forming agent into a container, uniformly mixing and stirring, thereby acquiring a mixed solution; vacuumizing for two times in a vacuum drying oven; adding a tins catalyst, uniformly stirring, adding TDI 80/20 and uniformly stirring, thereby acquiring a mixture; quickly pouring the mixture into a mold, placing into a stove, foaming and keeping temperature, thereby acquiring soft pored polyurethane foams; placing the polyurethane foams into a netting solution, extruding the foams and exhausting; cleaning the polyurethane foams and then drying, thereby acquiring the netted polyurethane foams. The polyurethane netted material prepared according to the invention is uniformly pored; the aperture ratio can reach up to 98%; the foam pore net is smooth; the preparation method adopts a simple process, and is easy to operate and suitable for industrial application.

Description

technical field [0001] The invention relates to the technical field of polyurethane foam materials, in particular to a preparation method of a special polyurethane mesh material for foam ceramics with high opening ratio and uniform opening. Background technique [0002] Reticulated polyurethane foam is a new type of functional foam in polyurethane foam. turned into. The reticulated foam removes the original window film, leaving only the open-cell tendon "skeleton" structure, so the reticulated polyurethane foam has excellent air permeability, good flexibility and high mechanical strength, and With permanent elasticity, it can be widely used as filter material. [0003] Foam ceramic filter materials are mainly used for the purification of various non-ferrous metal smelting and casting. However, when polyurethane foam sponge is used as the precursor of foam ceramics, the sponge is required to have a three-dimensional mesh porous shape, and the sponge itself is required to ha...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08G18/82C08G18/76C08G18/48C08G18/24C08G18/18C08G101/00
Inventor 谢小莲
Owner 江西鸿司远特种泡沫材料有限公司
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