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Process for preparing flexible polyurethane foam plastic

A technology of flexible polyurethane and foamed plastics, applied in the field of flexible polyurethane foamed plastics, can solve problems such as the decline of mechanical properties of products, and achieve the effects of reducing the amount of catalysts, feeling comfortable, and improving performance

Inactive Publication Date: 2004-10-20
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When used to prepare polyurethane, the monoalcohol acts as a chain terminator, which limits the growth of the polymer molecular chain, resulting in a decrease in the mechanical properties of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Catalyst preparation: use diethylene glycol dimethyl ether as an organic ligand to prepare a zinc hexacyanocobaltate / zinc sulfate (DMC) composite catalyst improved with zinc sulfate;

[0023] (1) Solution preparation

[0024] Solution A: Dissolve 15g of potassium hexacyanocobaltate in 270ml of deionized water;

[0025] Solution B: Dissolve 45g of zinc chloride in 75ml of deionized water;

[0026] Solution C: a mixture of 180ml diethylene glycol dimethyl ether and 180ml deionized water;

[0027] (2) After mixing solution A and solution B under high-speed stirring, immediately add solution C to obtain a milky white suspension, continue stirring for 30 minutes, and separate the solid matter by filtration;

[0028] (3) Slurry the solid with a mixture solution containing zinc sulfate, stir for 20min, and filter;

[0029] Slurry composition: 105ml diethylene glycol dimethyl ether + 45ml deionized water + 12g zinc sulfate

[0030] (Potassium zinc hexacyano...

Embodiment 2

[0042] Embodiment two: (ultra-low density 8g / cm 3 Polyurethane flexible foam)

[0043] 1, the preparation of catalyst is with embodiment one;

[0044] 2, low unsaturation polyether polyol is prepared with embodiment one;

[0045] 3. Preparation of polyol components: low unsaturation polyether polyol, water, physical foaming agent, catalyst, surfactant, filler by weight ratio: low unsaturation polyether polyol: water: dichloro Methane: A-33 (dipropylene glycol solution of 33% WT triethylenediamine): dibutyltin dilaurate: surfactant (L-580, U.S. high Schmitt company product): polymer polyol ( TPOP93-28, produced by Tianjin No. 3 Petrochemical Plant): talcum powder (300 mesh) = 60: 8.5: 35: 0.6: 1.2: 3.5: 40: 45, keep the temperature at 30°C, and mix well in the container to obtain polyol Component;

[0046] 4. Isocyanate component: a mixture of 2,4-toluene diisocyanate and 2,6-toluene diisocyanate, the isomerization ratio is 80 / 20 (i.e. TDI-80) 103.5 parts, the temperature i...

Embodiment 3

[0054] 1, catalyst preparation, with embodiment one;

[0055] 2, low unsaturation polyether polyol is prepared with embodiment one;

[0056] 3. Preparation of polyol components: low unsaturation polyether polyol, water, catalyst, surfactant by weight ratio: low unsaturation polyether polyol: water: A-33 (33% WT Sanethylene dipropylene glycol solution of base diamine): dibutyltin dilaurate: surfactant (L-580, U.S. High Schmitt company product)=100: 4.0: 0.12: 0.12: 0.8, maintain temperature 35 ℃, in Mix well in the container to obtain the polyol component;

[0057] 4. Isocyanate component: a mixture of 2,4-toluene diisocyanate and 2,6-toluene diisocyanate, the isomerization ratio is 80 / 20 (i.e. TDI-80) 49 parts, the temperature is kept within 35°C for standby;

[0058] 5. Fully mix the isocyanate component and the polyol component at a temperature of 35°C, pour, foam, and post-cure to obtain the product. The test results are shown in Table 2.

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Abstract

Soft foamed polyurethane plastic is produced through a one-step reaction process with isocyanate component and low-unsaturation degree polyether polyol component in the presence of water as active foaming agent, catalyst(s), foam-stabilizing surfactant, optional foaming agent, coloring agent, stuffing, fire retardant and other conventional additives and assistants. It has high tensile strength, great elongation, very high tearing strength, improved machine performance and low cost.

Description

Technical field: [0001] The invention relates to the field of flexible polyurethane foams, in particular to a preparation technology suitable for flexible polyurethane foams. Background technique: [0002] Polyurethane flexible foam should meet the following requirements: it has a certain load resistance capacity, the cells are open, breathable, and the deformation is reversible. A. Hoeetlen and his colleagues carried out the pilot production of polyester polyurethane flexible foam for the first time in 1952, the fifteenth year after O. Bayer invented polyurethane. In the next few years, the vigorous development of polyurethane soft foam formulations and processing methods laid the foundation for industrial production. Only two years later, Mobe Chemical, founded by Bayer and Monsanto, introduced polyurethane foam technology based on polyester and TDI-80 (toluene diisocyanate) to the US market in 1954. Although polyether polyols were found to be suitable for the production...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/32
Inventor 亢茂青王心葵殷宁冯月兰张清运瞿波
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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