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Modified MDI for high load-bearing foam and preparation method thereof

A high-load-bearing, modified technology, which is applied in the field of modified MDI for high-load-bearing foam and its preparation, can solve the problems of increasing the manufacturing process of foam products, limited and other problems, and achieve increased rigidity and toughness, simple process, and increased flame retardancy. Effect

Active Publication Date: 2017-07-14
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent's ability to adjust comfort by density alone is limited and would increase the foam product manufacturing process

Method used

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  • Modified MDI for high load-bearing foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] First, put 6kg of polyester polyol PE-B175 and 7kg of cell opening agent DK-12 into the reactor, stir and heat up to 100°C, then adjust the vacuum to -0.09MPa, dehydrate for 2 hours while stirring, and cool down to 30°C ℃, add 1.2g of phosphoric acid and stir evenly, and finally add 49kg of MDI-50 and 41kg of 44V20, raise the temperature to 60℃, keep it warm for 40min, then cool down to 40℃. After testing that the NCO% is 26.74±0.2 and passing the test, the material is discharged and sealed for storage.

Embodiment 2

[0033] First, put 7kg of polyester polyol PE-B175 into the reactor, stir and heat up to 110°C, then adjust the vacuum degree to -0.09MPa, dehydrate for 2.5h while stirring, cool down to 35°C, add 1.0g of phosphoric acid and stir evenly, Finally, add 35kg of MDI-50, 10kg of 44C and 48kg of M20S, raise the temperature to 65°C and keep it warm for 45 minutes. After testing that the NCO% is 28.3±0.2 qualified, the material is discharged and sealed for storage.

Embodiment 3

[0035] First, put 8kg of polyester polyol PE-B175 and 5kg of cell opening agent DK-12 into the reactor, stir and heat up to 120°C, then adjust the vacuum degree to -0.085MPa, dehydrate for 3 hours while stirring, and cool down to 40°C. Add 1.5g of phosphoric acid and stir evenly, finally add 48kg of MDI and 39kg of 44V20, raise the temperature to 70°C, and keep it warm for 50min. After testing that the NCO% is 26.11±0.2, the material is discharged and sealed for storage.

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Abstract

The invention belongs to the field of polyurethane synthesis and in particular relates to modified MDI for high load-bearing foam and a preparation method thereof. The modified MDI is prepared from the following raw materials by mass percent: 5%-10% of polyester polyol, 0-10% of an opening agent and 80%-95% of isocyanate, wherein a storage stabilizer is 10ppm-15ppm of the total mass of the polyester polyol, the opening agent and the isocyanate; the total mass of the polyester polyol, the opening agent and the isocyanate is 100%; the polyester polyol is synthesized by adopting binary acid and dihydric alcohol through reaction; and the binary acid comprises terephthalic acid. Foam prepared by the modified MDI has excellent fire resistance, bearing capacity, hardness and resilience force, and a foam body is stable in structure and not easy to age. The preparation method is simple in process and easy to operate.

Description

technical field [0001] The invention belongs to the field of polyurethane synthesis, and in particular relates to a modified MDI for high load-bearing foam and a preparation method thereof. Background technique [0002] With the development of the automobile and furniture industries, the production and processing of polyurethane foam (PUF) has made great progress. At the same time, consumers have higher and higher requirements for the comfort of sofa cushions and mattresses, and a high-load-bearing foam has emerged as the times require. This kind of high-load-bearing foam is used in sofas, sports equipment, and vehicle seat cushions. Good load-bearing capacity and rebound will make people feel more comfortable. [0003] There are also many studies on improving the foam bearing capacity. The patent CN01133533 reports a production process for polyurethane cushions. The raw materials are mixed evenly and preheated to enhance the bonding force and viscous force between the raw ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/42C08G18/08C08G63/183C08G101/00
CPCC08G18/4216C08G18/7664C08G18/7671C08G2110/0025C08G2110/005
Inventor 徐军孙清峰甘经虎王翠栾森
Owner SHANDONG INOV POLYURETHANE
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