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Open-cell polyurethane foam and preparation method thereof

A technology of polyurethane foam and pore-opening agent, applied in the field of auto parts, can solve the problems of poor air permeability and unfavorable use of seat cushions, and achieve the effect of reasonable components

Inactive Publication Date: 2017-08-11
CHONGQING DEYING AUTO PARTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When polyurethane foam is used as a cushion equal to a support that is in direct contact with the human body, it is required that the polyurethane foam can exhibit good air permeability, but the existing polyurethane foam has generally poor air permeability, which is not conducive to the use as a cushion

Method used

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Examples

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Effect test

preparation example Construction

[0022] The preparation method of above-mentioned open-cell polyurethane foam, comprises the following steps:

[0023] The first component is prepared first, and then the prepared first component and the second component are mixed according to the weight ratio of 100:30-40 to prepare the polyurethane foam. The prepared polyurethane foam is then heated to obtain open-cell polyurethane foam.

[0024] The preparation method of the first component comprises:

[0025] Add cross-linking agent, foaming agent, foaming aid, foam stabilizer and cell opening agent into the mixture formed by polyether polyol and polymer polyol through high-speed stirring, and carry out low-speed stirring under constant temperature.

[0026] Preferably, the polyether polyol and the polymer polyol are stirred at a speed of 135-150 rpm for 30-45 minutes in the reactor. In this embodiment, 135-150 revolutions / min is high-speed stirring, and the purpose is to stir the two raw materials of polyether polyol and...

Embodiment 1

[0037] An open-cell polyurethane foam is composed of a first component and a second component. The first component is mainly made of the following components in parts by weight: 20 parts of polyether polyol, 20 parts of polymer polyol , 0.5 parts of crosslinking agent, 2 parts of foaming agent, 0.25 parts of foaming aid, 0.8 parts of foam stabilizer, and 0.5 parts of cell opener. The second component included 13.2 parts of toluene diisocyanate. The polyether polyol is a trifunctional polyether polyol with a molecular weight of 5000 g / mol and a mole fraction of primary hydroxyl groups of 65%. The polymer polyol is a polymer polyol with a solids content of 30%.

[0038] The preparation method of above-mentioned open-cell polyurethane foam, comprises the following steps:

[0039] Add 20 parts of polyether polyol and 20 parts of polymer polyol into a high-speed reactor and stir at a speed of 135 rpm for 30 minutes to fully mix to obtain a first mixture. Then transfer the first ...

Embodiment 2

[0041] An open-cell polyurethane foam is composed of a first component and a second component. The first component is mainly made of the following components in parts by weight: 45 parts of polyether polyol, 45 parts of polymer polyol , 3 parts of crosslinking agent, 4 parts of foaming agent, 1.5 parts of foaming aid, 1 part of foam stabilizer, and 5 parts of cell opening agent. The second component included 31.4 parts of toluene diisocyanate. The polyether polyol is a polyether polyol with 5 functionalities, a molecular weight of 6000 g / mol, and a mole fraction of primary hydroxyl groups of 75%. The polymer polyol is a polymer polyol with a solids content of 35%.

[0042] The preparation method of above-mentioned open-cell polyurethane foam, comprises the following steps:

[0043] Add 45 parts of polyether polyol and 45 parts of polymer polyol into a high-speed reactor and stir at a speed of 140 rpm for 40 min to fully mix to obtain a first mixture. Then transfer the first...

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Abstract

The invention relates to the field of automobile fittings, is polyurethane foam for seats in vehicles, and concretely relates to open-cell polyurethane foam and a preparation method thereof. The open-cell polyurethane foam is mainly prepared by a first component and a second component, and the weight ratio of the first component to the second component is 100:30-40. The first component is mainly prepared by the following components in parts by weight: 20-70 parts of polyether polyol, 20-70 parts of polymer polyol, 0.5-5 parts of a cross-linking agent, 2-6 parts of a foaming agent, 0.25-3 parts of a foaming auxiliary agent, 0.8-1.2 parts of a foam stabilizer, and 0.5-10 parts of a cell opener. The second component comprises toluene diisocyanate. The preparation method comprises the following steps: the first component is firstly prepared, the first component and the second component are mixed in order to prepare polyurethane foam, and after standing, the open-cell polyurethane foam is obtained. Good bearing performance of the polyurethane foam is guaranteed, and at the same time good permeability is also provided.

Description

technical field [0001] The invention relates to the field of auto parts, and relates to a polyurethane foam for seats in a car, in particular to an open-cell polyurethane foam and a preparation method thereof. Background technique [0002] Polyurethane foam, because of its excellent physical and mechanical properties (high resilience, low hysteresis loss), high compression load ratio (sag factor), it has significant sitting comfort, excellent fatigue resistance, similar to latex Surface feel, good air permeability and flame retardant performance; at the same time, the production cycle is short, high efficiency, low energy consumption, gradually replacing the traditional heat-cured polyurethane foam, widely used in automobiles, motorcycles, trains, furniture and other industries , used as seat cushions, backrests, mattresses, headrests, etc. [0003] When the polyurethane foam is used as a cushion equal to a support member in direct contact with the human body, it is require...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/65C08G18/40C08G18/48C08G18/63C08G18/32C08J9/08C08G101/00
CPCC08G18/3206C08G18/4072C08G18/4866C08G18/632C08G18/6564C08G18/6677C08G2110/0083
Inventor 王春明
Owner CHONGQING DEYING AUTO PARTS CO LTD
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