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Low exothermic quick-release composite polyether, b1 grade flame retardant polyurethane block derived therefrom and preparation method thereof

A technology combining polyether and low exotherm, applied in the field of polyurethane, can solve the problem of block foam prone to core burning, and achieve the effects of improving temperature resistance, improving mold release and improving production efficiency

Active Publication Date: 2022-03-22
SHANGHAI DONGDA POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the size of the mold increases, the heat release inside the polyurethane increases, and the polyurethane has better thermal insulation performance, and core burning is very easy to occur inside the block bubble.

Method used

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  • Low exothermic quick-release composite polyether, b1 grade flame retardant polyurethane block derived therefrom and preparation method thereof
  • Low exothermic quick-release composite polyether, b1 grade flame retardant polyurethane block derived therefrom and preparation method thereof
  • Low exothermic quick-release composite polyether, b1 grade flame retardant polyurethane block derived therefrom and preparation method thereof

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preparation example Construction

[0071] In yet another aspect, the present application also provides a method for preparing low-exothermic, quick-release B1-grade polyurethane block, which includes the following steps: adding isocyanate into the container in proportion, and after mixing the combined polyether uniformly, Pour it into a mold preheated at 35-40°C, then pull it into a drying room at 50-60°C for curing for a period of time, and then put it in a constant temperature room at 20-30°C for further curing to obtain polyurethane block foam for LNG. In some embodiments, the mass ratio of combined polyether and isocyanate is 1:1.6˜1.8.

[0072] In some embodiments, the isocyanate is high-viscosity liquefied MDI, the model is Suprasec 5008, the viscosity is 650mpa.s, and the -NCO content is 30%, purchased from Huntsman Polyurethane (China) Co., Ltd.

[0073] In some embodiments, the mold temperature ranges from 50°C to 60°C.

[0074] On the basis of not violating common knowledge in the field, the above-me...

Embodiment 1

[0106] The mass ratio of each component of the combined polyether in this embodiment is shown in Table 1.

[0107] A preparation method of low exothermic, quick release B1 grade polyurethane foam, comprising the following steps:

[0108] (1) 60 parts of polyester polyol AK-7004, 30 parts of polyester polyol PE-B175, 10 parts of polyether polyol DonolR6049, 3 parts of foam stabilizer L-6620NT, catalyst: 0.3 parts of N, N'- Dimethylcyclohexylamine, 1.8 parts of JXP-508, 0.6 parts of JXP-509, 0.8 parts of C-31, 0.8 parts of water, 5 parts of glycerol triglycidyl ether, 3 parts of cyclohexane, 22 parts of flame retardant Add TCPP, 10 parts of flame retardant TEP, and 34 parts of HCFC-141b into a stainless steel mixing kettle, stir at a speed of 500 rpm at room temperature for 1 hour, and discharge the materials to obtain low-heat, quick-release B1-grade polyurethane foam. Combined polyether;

[0109] (2) Under the condition of material temperature of 22°C, according to the mass ...

Embodiment 2

[0111] The proportioning ratio of each component of the combined polyether in this embodiment is shown in Table 1.

[0112] A preparation method of low exothermic, quick release B1 grade polyurethane foam, comprising the following steps:

[0113] (1) 65 parts of polyester polyol AK-7004, 25 parts of polyester polyol PE-B175, 10 parts of polyether polyol DonolR6049, 3 parts of foam stabilizer L-6620NT, catalyst: 0.2 parts of N, N'- Dimethylcyclohexylamine, 2.0 parts of JXP-508, 0.5 parts of JXP-509, 1.0 parts of C-31, 0.9 parts of water, 5 parts of glycerol triglycidyl ether, 3 parts of cyclohexane, 20 parts of flame retardant Add TCPP, 12 parts of flame retardant TEP, and 33 parts of HCFC-141b into a stainless steel mixing kettle, stir at room temperature at a speed of 500 rpm for 1 hour, and discharge the materials to obtain low-heat, quick-release B1-grade polyurethane foam. Combined polyether;

[0114] (2) Under the condition of material temperature of 22°C, according to ...

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Abstract

This application relates to a combination polyether with low exothermic and quick release, which contains the following components in parts by mass: 60-70 parts of the first polyester polyol, 20-30 parts of the second polyester polyol , 10 parts of polyether polyol, 2-3 parts of foam stabilizer, 2.5-5 parts of catalyst, 5 parts of glycerol triglycidyl ether, 3 parts of cyclohexane, 25-35 parts of flame retardant, 0.8-1.0 parts Chemical blowing agent and 35‑40 parts physical blowing agent. The present application also relates to the preparation method of the combination polyether with low exothermicity and rapid mold release. The present application also relates to a B1 grade flame-retardant polyurethane block derived from the combination polyether and a preparation method thereof. The combination polyether of the present application can solve the core burning problem of the B1 grade polyurethane block, and can improve the demoulding property of the B1 grade polyurethane block, and increase the production efficiency.

Description

technical field [0001] The present application relates to the field of polyurethane technology. Specifically, the application relates to a low-exothermic and quick-release combined polyether, a preparation method of the combined polyether, a B1 grade flame-retardant polyurethane block derived therefrom, and a preparation method of the polyurethane block. Background technique [0002] Rigid polyurethane block foam is made of high-functionality polyether and / or polyester polyol and polymerized MDI as the main raw materials. formed high molecular weight polymer. [0003] Polyurethane blocks can be cut to prepare LNG cold insulation materials, container plates, building sandwich panels, etc. Among them, LNG cold insulation materials, especially cutting special-shaped parts through block foams, are a main application field of block foams. LNG cold insulation materials have high requirements for flame retardancy, compressive strength and dimensional stability of foam. With the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/42C08G18/48C08G18/76C08G18/18C08K5/521C08K5/1515C08K5/01C08J9/08C08J9/14C08L75/04
Inventor 王光辉李丽李学庆
Owner SHANGHAI DONGDA POLYURETHANE