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Slow gel flexible polyurethane foam composition

A technology of slow-gel polyurethane and composition, which is applied in the field of slow-gel polyurethane soft foam composition, which can solve the problems of not being able to produce uniform foam, silicone oil foam stabilizer is difficult to achieve foam uniformity, and increases costs, so as to achieve good foam uniformity effect of effect

Active Publication Date: 2013-03-20
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of silicone oil foam stabilizer increases the cost. At the same time, when the gel time is longer than 10 minutes, the silicone oil foam stabilizer is difficult to achieve the effect of foam stabilization, and products with uniform foam cannot be produced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The components of the slow-gel polyurethane soft foam composition are as follows:

[0029] Component A, 100kg: Mix and stir PPG3600, 69.8kg, L3195 (produced by Qilu Petrochemical), 25kg, MOCA, 5kg, catalyst, 0.05kg, and water 0.15kg evenly to obtain a polymer;

[0030] Component B, 100kg: PPG2000, 60kg, toluene diisocyanate T-80, 15kg, plasticizer DOP, 25kg, react at a temperature of 70-90°C for 2 hours to obtain a prepolymer with a mass content of isocyanate of 4.4% .

[0031] Use the above composition to prepare polyurethane soft foam products:

[0032] Mix the polymer component A and prepolymer component B prepared above at a temperature of 30°C, control the gel time to 60 minutes, cast at room temperature, and vulcanize at room temperature to obtain a hardness of Shore 15A and a density of 0.75g / cm 3 Polyurethane soft foam products. Its performance is shown in Table 1.

Embodiment 2

[0034] The components of the slow-gel polyurethane soft foam composition are as follows:

[0035] Component A, 100kg: Mix and stir PPG330N, 61.73kg, L3195 (produced by Qilu Petrochemical), 30kg, E-300, 8kg, catalyst, 0.07kg, and water 0.2kg evenly to obtain a polymer;

[0036] Component B, 100kg: PPG3000, 54kg, diphenylmethane diisocyanate MDI-50, 23kg, plasticizer DOP, 23kg, reacted at a temperature of 70-90°C for 2 hours to obtain isocyanate with a mass content of 6.2%. prepolymer.

[0037] Use the above composition to prepare polyurethane soft foam products:

[0038] Mix the above-prepared polymer component A and prepolymer component B at a temperature of 30°C, control the gel time to 50 minutes, cast at room temperature, and vulcanize and mold at room temperature to obtain a hardness of Shore 30A and a density of 0.8g / cm 3 Polyurethane soft foam products. Its performance is shown in Table 1.

Embodiment 3

[0040] The components of the slow-gel polyurethane soft foam composition are as follows:

[0041] Component A, 100kg: Mix and stir PPG3600, 35.05kg, PPG1000, 20kg, L3195 (produced by Qilu Petrochemical), 35.6kg, MOCA, 9kg, catalyst, 0.1kg, and water 0.25kg to obtain a polymer;

[0042] Component B, 100kg: PPG2000, 50kg, diphenylmethane diisocyanate MDI-100, 28kg, plasticizer DOP, 22kg, reacted at a temperature of 70-90°C for 2 hours to obtain isocyanate with a mass content of 7.3%. prepolymer.

[0043] Use the above composition to prepare polyurethane soft foam products:

[0044] Mix the polymer component A and prepolymer component B prepared above at a temperature of 30°C, control the gel time to 40 minutes, cast at room temperature, and vulcanize at room temperature to obtain a hardness of Shore 45A and a density of 0.85g / cm 3 Polyurethane soft foam products. Its performance is shown in Table 1.

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Abstract

The invention relates to a slow gel flexible polyurethane foam composition which comprises a component A and a component B with a weight ratio of 1:1, wherein the component A comprises the ingredients in percent by weight of 52.5-69.8 percent of polypropylene oxide ether polyol with a functionality degree of 2 or 3 and a number-average molecular weight of 1000-6000, 25-34 percent of aromatic hydrocarbon compound, 5-13 percent of aromatic diamine hardener, 0.05-0.2 percent of catalyst and 0.15-3 percent of water, and the ingredients are mixed and stirred uniformly to form a polymer; and the component B comprises the ingredients of 50-60 percent of polyether polyol, 15-28 percent of diisocyanate and 16-25 percent of plasticizer, and the ingredients react for 2-3h at a temperature of 70-90 DEG C to obtain a prepolymer with isocyanate with a mass content of 4.4-10 percent. When a flexible polyurethane foam material is prepared, the slow gel flexible polyurethane foam composition can generate a better foam homogenizing effect without using a silicone oil foam stabilizer; and the slow gel flexible polyurethane foam composition is long in gelation time, and ensures that enough operation time is provided when a complex product is produced.

Description

technical field [0001] The invention belongs to the field of flexible polyurethane foam materials, in particular to a slow-gel polyurethane flexible foam composition. Background technique [0002] Compared with ordinary rubber, polyurethane soft foam material has excellent mechanical properties, oil resistance and fatigue resistance. Compared with ordinary rubber, polyurethane soft foam materials have higher strength and better toughness when the hardness is the same; when the volume is the same, the weight is lighter; when the compression deformation is the same, the volume change is smaller. The most prominent feature of polyurethane soft foam material is its excellent shock absorption performance, so it is widely used in the manufacture of shockproof cushioning materials. Usually, in order to obtain soft polyurethane foam, it is necessary to add silicone oil foam stabilizer to get a good foam stabilizer effect. The addition of silicone oil foam stabilizer increases the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/10C08K5/12C08K5/109C08L75/08
Inventor 李健陈由亮陈海良张芳
Owner SHANDONG INOV POLYURETHANE
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