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Entire-water polyurethane rigid foam, and preparation method and application thereof

A rigid foam and polyurethane technology, applied in the field of rigid foam, can solve the problems of polyether polyol high hydroxyl value consumption of isocyanate, increased foam density, and poor fluidity of the system, achieving good dimensional stability and high foam density. Small, viscosity-reducing effect

Active Publication Date: 2020-08-21
上海抚佳精细化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved in the present invention is to overcome the high hydroxyl value of the raw material polyether polyol used in the existing all-water foaming technology and the need to consume a very large amount of isocyanate, thereby making the fluidity of the system worse and the density of the foam. large imperfections, thus providing an all-water polyurethane rigid foam

Method used

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  • Entire-water polyurethane rigid foam, and preparation method and application thereof
  • Entire-water polyurethane rigid foam, and preparation method and application thereof
  • Entire-water polyurethane rigid foam, and preparation method and application thereof

Examples

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Embodiment 1

[0041] The present embodiment provides a kind of full water polyurethane rigid foam, and its raw material is as follows:

[0042] The first polyether polyol 350G: 100g, produced by Jiahua Chemical (Binzhou) Co., Ltd., functionality 4-5, number average molecular weight 600-800, hydroxyl value 330-370mgKOH / g, viscosity 700-1200mPa·s (25℃ ), the water content is less than 0.1%; the acid value is less than 0.1% mgKOH / g;

[0043]Catalyst: 0.2g of pentamethylenediethylenetriamine, 0.1g of 1,3,5-tris(dimethylaminopropyl)hexahydrotriazine, 1g of dimethylcyclohexylamine;

[0044] Silicone surfactant: Momentive L-6900 2g;

[0045] Water: 5g;

[0046] Crosslinking agent: glycerin 1.0g;

[0047] Flame retardant: 10g of tris (2-chloropropyl) phosphate;

[0048] Isocyanate: 176g PM200 (Wanhua Chemical Group Co., Ltd.).

[0049] The preparation method of above-mentioned poly all-water polyurethane rigid foam, comprises the steps:

[0050] (1) Accurately weigh the above-mentioned raw ma...

Embodiment 2

[0054] The present embodiment provides a kind of full water polyurethane rigid foam, and its raw material is as follows:

[0055] The first polyether polyol 3776: 100g, produced by Jiahua Chemical (Binzhou) Co., Ltd., functionality 4-5, number average molecular weight 600-800, hydroxyl value 310-350mgKOH / g, viscosity 1500m-3500Pa·s (25℃ ), the water content is less than 0.1%; the acid value is less than 0.1% mgKOH / g;

[0056] Catalyst: 2g of pentamethylenediethylenetriamine, 1g of 1,3,5-tris(dimethylaminopropyl)hexahydrotriazine, 1g of potassium acetate, 2g of triethylenediamine;

[0057] Silicone surfactant: Mester M-198 2g;

[0058] Water: 5g;

[0059] Crosslinking agent: triethanolamine 1.0g;

[0060] Flame retardant: tetrabromophthalic anhydride diol 50g;

[0061] Isocyanate: 180g PM400 (Wanhua Chemical Group Co., Ltd.).

[0062] The preparation method of above-mentioned poly all-water polyurethane rigid foam, comprises the steps:

[0063] (1) Accurately weigh the ab...

Embodiment 3

[0067] The present embodiment provides a kind of full water polyurethane rigid foam, and its raw material is as follows:

[0068] The first polyether polyol 7820: 100g, produced by Shanghai Fujia Fine Chemical Co., Ltd., functionality 6-8, number average molecular weight 800-1000, hydroxyl value 260-300mgKOH / g, viscosity 700-1500mPa·s (25℃) , the water content is less than 0.1%; the acid value is less than 0.1% mgKOH / g;

[0069] Catalyst: 0.1g of pentamethylenediethylenetriamine, 0.5g of 1,3,5-tris(dimethylaminopropyl)hexahydrotriazine, 0.2g of potassium acetate, 0.5g of triethylenediamine;

[0070] Silicone surfactant: Dongjun H360 2g;

[0071] Water: 5g;

[0072] Crosslinking agent: glycerin 1.0g;

[0073] Flame retardant: red phosphorus 30g;

[0074] Isocyanate: 173 g M20S (BASF AG).

[0075] The preparation method of above-mentioned poly all-water polyurethane rigid foam, comprises the steps:

[0076] (1) Accurately weigh the above-mentioned raw materials except the ...

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Abstract

The invention relates to an entire-water polyurethane rigid foam, and a preparation method and an application thereof. The entire-water polyurethane rigid foam comprises a first polyether polyol as araw material, the functionality of the first polyether polyol is 3-8, the hydroxyl value of the first polyether polyol is 50-400 mgKOH / g, and the viscosity of the first polyether polyol is 200-3500 mPa.s. The polyether polyol with proper functionality, molecular weight, hydroxyl value and viscosity is selected, and when the raw material is used for producing rigid foam, the foam has a better isocyanate index and a small foam density, the problem of foam shrinkage is avoided in the foaming process, the foam has good dimensional stability, and the viscosity of the system is effectively reduced in an all-water system without a physical foaming agent.

Description

technical field [0001] The invention relates to the field of rigid foams, in particular to a full-water polyurethane rigid foam and its preparation method and application. Background technique [0002] All-water polyurethane rigid foam is widely used in insulation fields such as pipes, panels and spraying. It is usually obtained by the reaction of isocyanate and polyol composition, such as polyester polyol or polyether polyol, under the combined action of a catalyst and a surfactant. The all-water foaming technology itself does not require the use of physical blowing agents, so it is an environmentally friendly technology. However, because the polyol composition usually has a high viscosity, and the all-water foaming technology does not have a low-viscosity physical foaming agent, it is difficult to operate the all-water foaming technology without changing the current process. [0003] In order to reduce the viscosity of the system in the all-water foaming technology, some...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08K5/521C08K3/02C08L75/08C09D175/08C08G101/00
CPCC08G18/6677C08G18/6688C08G18/4829C08G18/4816C08G18/3206C08G18/3281C08K5/521C08K3/02C08L75/08C09D175/08C08K2003/026C08G2110/0083C08G2110/0025
Inventor 窦肖萌宋宝宁关永坚李玉博
Owner 上海抚佳精细化工有限公司
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