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Breathable slow rebound polyurethane foam and its preparation method and application

A foamed plastic and polyurethane technology, applied in the field of polyurethane foamed plastic and its preparation, can solve the problems of poor slow rebound effect and low air permeability, etc.

Active Publication Date: 2021-09-07
JIANGSU CHANGHUA POLYURETHANE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the main problems to be solved by the present invention is the low air permeability of slow rebound polyurethane foam plastics in the prior art or the problem of poor slow rebound effect at the same time. The present invention provides a breathable slow rebound polyurethane foam plastic with polyurethane foam air permeability High and has the advantages of good slow rebound effect

Method used

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  • Breathable slow rebound polyurethane foam and its preparation method and application
  • Breathable slow rebound polyurethane foam and its preparation method and application
  • Breathable slow rebound polyurethane foam and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. In container A, add polyether polyol A: 20 parts, polyether polyol B: 40 parts, polyether polyol C: 40 parts, water: 2 parts, A-33: 0.5 parts part, T-9: 0.1 part, L-618: 1 part, stir evenly, the stirring speed is 2500rpm, and the stirring temperature is 25°C; the hydroxyl value of polyether polyol A is 112gKOH / g, the functionality is 3, and the ring Ethylene oxide accounts for 60% by weight of the molecular weight of polyether polyol A; the hydroxyl value of polyether polyol B is 180mgKOH / g, and the functionality is 3, and ethylene oxide accounts for the molecular weight of polyether polyol B The weight percent content of polyether polyol C is 85%; the hydroxyl value of polyether polyol C is 41 mgKOH, and the functionality is 3;

[0026] 2. Add 60 parts by weight of toluene diisocyanate into container A, stir for 4-6 seconds to obtain material I, the stirring speed is 3000rpm, and the stirring temperature is 25°C;

[0027] 3. Quickly pour the material Ⅰ into a foami...

Embodiment 2 to Embodiment 5

[0029] Examples 2 to 5 were carried out according to the steps of Example 1. The only difference was the type of raw materials, the ratio of raw materials, the reaction time and the temperature. See Table 3 for details. The prepared breathable slow-rebound polyurethane foam The product quality inspection data are shown in Table 5.

[0030] The parts by weight of raw materials of each component in table 3 embodiment 1 to embodiment 5

[0031]

[0032]

[0033]

Embodiment 6 to Embodiment 8 and comparative example 1 to 3

[0035] Examples 6 to 8 and Comparative Examples 1 to 3 were carried out according to the steps of Example 1. The only difference was the type of raw materials, the ratio of raw materials, the reaction time and the temperature. See Table 4 for details. The prepared breathable The product quality inspection data of slow rebound polyurethane foam are shown in Table 5.

[0036] The parts by weight of raw materials of each component in table 4 embodiment 6 to embodiment 8 and comparative examples 1 to 3

[0037]

[0038]

[0039]

[0040] The quality inspection data of the air-permeable slow-rebound polyurethane foam plastics that table 5 embodiment 1 to 8 and comparative example 1 to 3 prepare

[0041]

[0042] As can be seen from Examples 1 to 8, the air permeability of the polyurethane foam of the present invention is as high as 332 L / min, indicating that the air permeability of the polyurethane foam is good; the depression recovery time of the present invention is con...

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Abstract

The invention relates to a breathable slow-rebound polyurethane foam and its preparation method and application. The problem of poor performance. The present invention adopts a kind of air-permeable slow-rebound polyurethane foam, which comprises: polyether polyol A: 10-100 parts, polyether polyol B: 1-50 parts, polyether polyol C: 1 ~50 parts, 40~80 parts of isocyanate, water: 1~5 parts, amine catalyst: 0.2~0.8 part, tin catalyst: 0.01~0.4 part, foam stabilizer: 0.5~3 part, of which polyether polyol A The hydroxyl value of polyether polyol A is 60-230 mgKOH / g, the degree of unsaturation is 0.01-0.2 mmol / g, the functionality is 2-4, and the weight percentage of ethylene oxide in the molecular weight of polyether polyol A is 50%-80 %; The hydroxyl value of polyether polyol B is 120-210mgKOH / g, the degree of unsaturation is 0.01-0.2mmol / g, the functionality is 2-4, and ethylene oxide accounts for 100% by weight of the molecular weight of polyether polyol B The polyether polyol C has a hydroxyl value of 35-59mgKOH, a degree of unsaturation of 0.01-0.2mmol / g, a functionality of 2-4, and the technical scheme of its preparation method and application, and has obtained It has a good technical effect and can be used in the industrial production of breathable slow rebound foam plastics.

Description

technical field [0001] The invention relates to a polyurethane foam and a preparation method thereof, in particular to a breathable slow-rebound polyurethane foam, a preparation method and application thereof. Background technique [0002] Polyurethane foam, especially polyurethane flexible foam, is widely used in automobiles, sofas, mattresses, packaging and other industries, because of its soft and elastic porous structure, it can provide a very comfortable human body experience. [0003] Polyurethane slow rebound foam has a relatively slow recovery speed, can remember the shape of the human body, effectively disperse the pressure of the human body, and provide a comfortable human body experience. It is also called memory foam and zero pressure sponge. The air permeability of polyurethane foam is expressed by foam air permeability, the higher the foam air permeability, the better the air permeability of polyurethane foam. The slow rebound effect of polyurethane slow rebou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/67C08G101/00
CPCC08G18/6795C08G2110/0083
Inventor 祁青海万浩远茅金龙陈凤秋胡昭晖
Owner JIANGSU CHANGHUA POLYURETHANE SCI & TECH
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