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Foamed plastics for low-density high-flame-retardant continuous board and its preparation method

A foamed plastic and high flame retardant technology, which is applied in the field of low-density and high-flame-retardant continuous board foam and its preparation, can solve the problems of insufficient reaction of raw materials, high injection density, low foam strength, etc., and achieves low production cost. , The effect of simple process and low thermal conductivity

Active Publication Date: 2018-05-01
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the traditional B1 high flame retardant polyol composition uses a large amount of high flame retardant polyester. Compared with polyether, polyester has lower functionality and lower foam strength. It is particularly important to match high functionality polyol, but high functionality There are hidden dangers of insufficient reaction of raw materials during the preparation of polyols
On the other hand, the injection density of traditional high flame retardant continuous board foam is relatively high, at 55-60kg / m 3 Left and right, the cost is high, more and more manufacturers of B1 high flame retardant continuous board seek to control the cost by improving the raw material and reducing the injection density, but when the raw material selection is inappropriate or the density is too low, the foam is prone to shrinkage , how to ensure the dimensional stability of foams with lower injection density is particularly important

Method used

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  • Foamed plastics for low-density high-flame-retardant continuous board and its preparation method
  • Foamed plastics for low-density high-flame-retardant continuous board and its preparation method
  • Foamed plastics for low-density high-flame-retardant continuous board and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of polyether polyol A:

[0039] In a 2.5L autoclave equipped with a stirrer, a meter, a heating temperature control device, a cooling device (including an outer jacket and an inner coil) and a pressure sensor, add 342g of sucrose, 39.5g of pentaerythritol, 3.81g of catalyst KOH, and replace with nitrogen 5 times, and evacuated to a pressure of -0.08MPa, then stirred (speed 500r / min) to raise the temperature, when the temperature increased to 85°C, add 88.75g of ethylene oxide, control the initial pressure of 0.20MPa, and react until the pressure is constant , then the temperature was raised to 100°C, the pressure was controlled at 0.20MPa, 399.375g of propylene oxide was continuously added, and the remaining 177.5g of ethylene oxide was continuously added after the reaction until the pressure did not change. After a period of aging, the remaining 221.875g of propylene oxide was added Propylene oxide is added continuously, the pressure is controlled at 0.20MP...

Embodiment 2

[0058] Preparation of polyether polyol A:

[0059] In a 2.5L autoclave equipped with a stirrer, a meter, a heating temperature control device, a cooling device (including an outer jacket and an inner coil) and a pressure sensor, add 342g of sucrose, 39.5g of pentaerythritol, 3.81g of catalyst KOH, and replace with nitrogen 5 times, and evacuate to a pressure of -0.08MPa, then stir (speed 500r / min) to raise the temperature, when the temperature increases to 90°C, add 133.125g of ethylene oxide, control the initial pressure of 0.25MPa, and react until the pressure is constant , then the temperature was raised to 110°C, the pressure was controlled at 0.25MPa, 257.375g of propylene oxide was continuously added, and the remaining 337.25g of ethylene oxide was continuously added after the reaction until the pressure no longer changed, and the remaining 159.75g of ethylene oxide was added continuously after aging for a period of time. Add propane continuously, control the pressure at...

Embodiment 3

[0078] Preparation of polyether polyol A:

[0079] In a 2.5L autoclave equipped with a stirrer, a meter, a heating temperature control device, a cooling device (including an outer jacket and an inner coil) and a pressure sensor, add 342g of sucrose, 39.5g of pentaerythritol, 3.81g of catalyst KOH, and replace with nitrogen 5 times, and evacuated to a pressure of -0.08MPa, then stirred (speed 500r / min) to raise the temperature, when the temperature increased to 85°C, add 177.5g of ethylene oxide, control the initial pressure of 0.20MPa, and react until the pressure is constant , then the temperature was raised to 120°C, the pressure was controlled at 0.20MPa, 133.125g of propylene oxide was continuously added, and the remaining 488.125g of ethylene oxide was continuously added after the reaction until the pressure did not change. After a period of aging, the remaining 88.75g of epoxy Add propane continuously, control the pressure at 0.20MPa, react until the pressure no longer c...

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Abstract

The invention belongs to the technical field of polyurethane synthesis and particularly relates to famed plastic for a low-density and high-flame-retardant continuous slab and a preparation method for the foamed plastic. The plastic is composed of a component A and a component B, wherein raw materials of the component A are as follows: 10-20 parts of polyether polyol A, 30-50 parts of flame-retardant polyether polyol B, 30-40 parts of flame-retardant polyester polyol, 2-5 parts of a crosslinking agent, 1-2 parts of water, 2-3 parts of a foam stabilizer, 20-30 parts of a physical foaming agent, 2-4 parts of a catalyst, and 25-40 parts of a flame retardant; and the component B is modified MDI. By selecting specially-prepared polyether polyol A which is reasonably matched with other components, the prepared foamed plastic for the low-density B1 and high-flame-retardant continuous slab has a relatively low heat conductivity coefficient, relatively high strength, certain open porosity and relatively superior foam stability. The preparation method is scientific and reasonable and is easy to implement.

Description

technical field [0001] The invention belongs to the technical field of polyurethane synthesis, and in particular relates to a low-density high-flame-retardant continuous board foam plastic and a preparation method thereof. Background technique [0002] Compared with conventional rock wool composite boards, polystyrene composite boards, and phenolic foam composite boards, polyurethane continuous boards have the obvious advantage of lower thermal conductivity. more and more widely used. However, due to the unsatisfactory flame retardancy and temperature resistance of conventional polyurethane foam, its application is limited to a certain extent. Therefore, the development and application of flame-retardant polyurethane continuous board is a key issue in polyurethane research at present. [0003] The polyol combination material is used as the raw material of the high flame-retardant polyurethane continuous board, including a variety of polyols and additives, foaming agents, et...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08G18/42C08G65/28C08J9/14
CPCC08G18/4018C08G18/4804C08G18/4845C08G65/2606C08J9/144C08J2375/08
Inventor 刘军念以亭马海晶宁晓龙
Owner SHANDONG INOV NEW MATERIALS CO LTD
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