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A combination of polyether polyol, polyurethane foam and preparation method thereof

A technology of polyurethane foam and polyether polyol, which is applied in the field of polyurethane, can solve the problems of damaging the thermal insulation performance of doors and windows, and it is difficult to ensure the process requirements, so as to achieve the effect of ensuring thermal insulation performance

Active Publication Date: 2022-03-01
SHANGHAI DONGDA POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polyurethane rigid foam needs a certain ambient temperature in the production process, and there are also requirements for the temperature of door and window profiles, but in the actual production process, each manufacturer produces at ambient temperature, and it is difficult to guarantee the process requirements, especially when the ambient temperature is 0 When the temperature is around ℃, the shrinkage problem of polyurethane rigid foam material is particularly prominent, which seriously damages the thermal insulation performance of doors and windows.

Method used

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  • A combination of polyether polyol, polyurethane foam and preparation method thereof
  • A combination of polyether polyol, polyurethane foam and preparation method thereof
  • A combination of polyether polyol, polyurethane foam and preparation method thereof

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preparation example Construction

[0039] In the third aspect, the present application also provides a method for preparing polyurethane foam for door and window profiles, which includes the following steps: using a low-pressure foaming machine and PAPI to process the combined polyether polyol at a flow rate of 20 to 40 g / s Mixing, then pouring in the foaming groove of paper strips and penetrating into the cavity of door and window profiles, can obtain the door and window profiles filled with polyurethane hard foam.

[0040] In a specific implementation of the third aspect, the mixing method and conditions of the combined polyether are conventional methods and conditions in the field, and the mixing temperature of the low-pressure foaming machine is ambient temperature, especially around 0°C, Rare in this field.

[0041] In a specific implementation manner of the third aspect, the mixing operation preferably uses a low-pressure foaming machine with a flow rate of 30 g / s.

[0042] In a specific embodiment of th...

Embodiment 1

[0046] The preparation method of combination polyether polyol:

[0047]Put polyether polyol EP3600 (5 parts), NJ-410HN (50 parts), SD8238 (45 parts) in the reaction kettle, and add catalysts POLYACAT 5 (1 part), POLYACAT 8 (1 part), POLYCAT 41 ( 2 parts), silicone oil B8545 (3 parts), deionized water (0.8 parts), foaming agent (25 parts) and stir well.

[0048] Take the above combination polyether polyol and PAPI and use a low-pressure foaming machine to inject at a flow rate of 30g / s, and the mass ratio of the combination polyether polyol to PAPI is 1:1, respectively at 0°C and room temperature (25°C) The door and window profiles are obtained after foaming and molding.

Embodiment 2

[0050] The preparation method of combination polyether polyol:

[0051] Put polyether polyol SD7100 (40 parts), SD8238 (60 parts) in the reaction kettle, add catalyst DABCOT (1 part), K15 (3 parts), silicone oil B8545 (2 parts), S198 (1 part), Deionized water (1 part), foaming agent (21 parts) are stirred evenly;

[0052] Take the above combination polyether polyol and PAPI and use a low-pressure foaming machine to inject at a flow rate of 30g / s, and the mass ratio of the combination polyether polyol to PAPI is 1:1, respectively at 0°C and room temperature (30°C) The door and window profiles are obtained after foaming and molding.

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Abstract

The invention relates to a combined polyether polyol, polyurethane foam and a preparation method thereof. The combined polyether polyol comprises the following components by weight: 100 parts of polyether polyol; 4-6 parts of catalyst; 2-3 parts of foam stabilizer; 20-25 parts of foaming agent; 0.8-1.5 parts of water; , the polyether polyol includes two or more combinations of EP330N, EP3600, YD6205, SD8238, NJ‑410HN or SD7100. Compared with the prior art, the present invention adjusts the types of polyether polyols and cooperates with effective catalysts, foam stabilizers and foaming agents to have the characteristics of low-temperature foaming, especially foaming at around 0°C without shrinkage, thereby ensuring Insulation performance of door and window profile products.

Description

technical field [0001] The invention relates to the field of polyurethane, in particular to a combined polyether polyol, polyurethane foam and a preparation method thereof. Background technique [0002] In modern buildings, doors and windows are one of the most common components. Among them, aluminum alloy doors and windows have become the mainstream of consumption due to their advantages of convenient production and installation, and no deformation after long-term use. However, aluminum alloy has better heat conduction effect than wood, etc. This will lead to an increase in energy consumption. As the country's requirements for energy saving and consumption reduction are getting higher and higher, the energy saving of doors and windows has attracted the attention of many scholars. In order to solve the problem of energy saving and heat preservation of doors and windows, rock wool, polystyrene, polyurethane rigid foam and other materials can be filled in the profiles of doors...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08J9/14C08G101/00
CPCC08G18/4804C08J9/144C08G2101/00C08J2203/142
Inventor 徐军魏路郭莉
Owner SHANGHAI DONGDA POLYURETHANE