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Rigid polyurethane foam and raw material composition, combined polyether, preparation method and application

A technology of rigid polyurethane and raw material composition, applied in the field of polyurethane materials, can solve the problems of environmental damage, high viscosity of all-water foaming system, poor dimensional stability, etc., and achieve the effects of safe production operation, zero ODP value, and low cost

Active Publication Date: 2016-05-25
SHANGHAI DONGDA POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the disadvantages of high viscosity and poor dimensional stability in the all-water foaming system by overcoming the defects of high viscosity and poor dimensional stability in the rigid polyurethane foam in the prior art, which mostly use CFC series foaming agents, thus providing a A kind of rigid polyurethane foam and raw material composition, combined polyether, preparation method and application

Method used

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  • Rigid polyurethane foam and raw material composition, combined polyether, preparation method and application
  • Rigid polyurethane foam and raw material composition, combined polyether, preparation method and application
  • Rigid polyurethane foam and raw material composition, combined polyether, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Preparation of combined polyether:

[0039] 4 parts of polyether polyol SA380, 6 parts of polyether polyol DL-1000D, 0.2 parts of silicone foam stabilizer L-6900, 0.1 part of N,N-dimethylbenzylamine, 0.03 parts of 1,2,3, 5-tris(dimethylaminopropyl)-hexahydrotriazine and 0.37 parts deionized water.

[0040] According to the above formula, add each ingredient into a stainless steel mixing kettle, stir at a speed of 500 rpm at room temperature for 1 hour, and then discharge the ingredients.

[0041] (2) Preparation of rigid polyurethane foam:

[0042] Mix the combined polyether and isocyanate PM-200 of Example 1 at 20°C according to the mass ratio of 1:1.6, use a high-pressure foaming machine to foam, and inject it into a mold to obtain a core density of 50Kg / m 3 The rigid polyurethane foam used for pipe insulation is shown in Table 1 for the physical properties of the rigid polyurethane foam.

Embodiment 2

[0052] (1) Preparation of combined polyether:

[0053] 6 parts of polyether polyol SA380, 4 parts of polyether polyol DL-1000D, 0.2 parts of silicone foam stabilizer L-6900, 0.1 part of N,N-dimethylbenzylamine, 0.04 parts of 1,2,3, 5-tris(dimethylaminopropyl)-hexahydrotriazine and 0.33 parts deionized water.

[0054] According to the above formula, add each ingredient into a stainless steel mixing kettle, stir at a speed of 500 rpm at room temperature for 1 hour, and then discharge the ingredients.

[0055] (2) Preparation of rigid polyurethane foam:

[0056] Mix the combined polyether and isocyanate PM-200 in Example 2 at 20°C according to the mass ratio of 1:1.6, use a high-pressure foaming machine to foam, and inject it into the mold to obtain a core density of 50Kg / m 3 The rigid polyurethane foam used for pipe insulation is shown in Table 2 for the physical properties of the rigid polyurethane foam.

Embodiment 3

[0066] (1) Preparation of combined polyether:

[0067] 5 parts of polyether polyol SA380, 5 parts of polyether polyol DL-1000D, 0.2 parts of silicone foam stabilizer L-6900, 0.13 parts of N,N-dimethylbenzylamine, 0.04 parts of 1,2,3, 5-tris(dimethylaminopropyl)-hexahydrotriazine and 0.36 parts deionized water.

[0068] According to the above formula, add each ingredient into a stainless steel mixing kettle, stir at a speed of 500 rpm at room temperature for 1 hour, and then discharge the ingredients.

[0069] (2) Preparation of rigid polyurethane foam:

[0070] Mix the combined polyether of Example 3 and isocyanate PM-200 at 20°C according to the mass ratio of 1:1.6, use a high-pressure foaming machine to foam, and inject it into a mold to obtain a core density of 50Kg / m 3 The rigid polyurethane foam used for pipe insulation, the physical properties of the rigid polyurethane foam are shown in Table 3.

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Abstract

The invention discloses a kind of rigid polyurethane foam, a raw material composition, a composite polyether, a preparation method and applications. The composite polyether comprises raw materials, by weight, 4-6 parts of polyether polyol SA380, 4-6 parts of polyether polyol DL-1000D, 0.2-0.3 part of foam stabilizer, 0.1-0.2 part of catalysts and 0.3-0.4 part of water, the sum of parts of of the polyether polyol SA380 and the polyether polyol DL-1000D is 10, the catalysts are composite catalysts of N,N-dimethyl benzylamine and 1,3,5-(dimethylamino propyl)-hexahydro triazine. The composite polyether employs water as a foaming agent, and has advantages of zero ODP value and zero GWP value. The preparation method needs no equipment transformation, the production operation is safe, the raw materials are easily available, and the cost is low. The rigid polyurethane foam has excellent dimensional stability, compressive strength and heat conductivity coefficient, and is especially suitable for piping insulation.

Description

technical field [0001] The invention relates to the field of polyurethane materials, in particular to a rigid polyurethane foam, a raw material composition, a combined polyether, a preparation method and an application. Background technique [0002] In the petrochemical industry, thermal insulation (cold) materials such as rock wool and aluminum silicate are often used for thermal insulation (cold) materials. With the development of science and technology, more and more new thermal insulation (cold) materials continue to appear , polyurethane foam is one of them. They have the characteristics of low apparent density, certain strength, low thermal conductivity and good thermal insulation performance. [0003] At present, dichlorofluoroethane (also known as HCFC-141B) is mostly used as a physical blowing agent in the production process of polyurethane foam for pipelines. As we all know, chlorofluorocarbon (also known as CFC) series refrigerant products have a destructive eff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08G18/18C08G18/20C08J9/12F16L59/02C08G101/00
CPCC08G18/1816C08G18/2036C08G18/4804C08G2110/0025C08G2110/0083F16L59/02
Inventor 李心强李明信延垒任丽
Owner SHANGHAI DONGDA POLYURETHANE
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