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Polyurethane foaming material and preparation method thereof

A foaming material, polyurethane technology, applied in the field of polyurethane foaming material and its preparation, can solve the problems of poor thermal insulation performance, high thermal conductivity, etc., achieve the effect of reducing density, reducing thermal conductivity, and improving dent strength

Active Publication Date: 2020-12-08
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: The technical problem to be solved by the present invention is to provide a polyurethane foam material to solve the problems of high thermal conductivity and poor thermal insulation performance of the polyurethane foam material in view of the deficiencies in the prior art

Method used

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  • Polyurethane foaming material and preparation method thereof
  • Polyurethane foaming material and preparation method thereof
  • Polyurethane foaming material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) 108 parts of vegetable oil polyols (derived from soybean oil) with a hydroxyl value of 450 mgKOH / g, 7 parts of TBD, 3 parts of DBN, 4 parts of surfactants, 1.5 parts of BDO and 0.5 parts of TMP were transferred to the reactor and stirred for 30 minutes, The stirring speed of the reactor is 700r / min, and the temperature inside the reactor is controlled to be 50°C; after stirring for 30 minutes, add 25 parts of HFC-245fa into the reactor and continue stirring for 20 minutes.

[0038]2) Add 57.6 parts of PAPI and 38.4 parts of MDI, 15 parts of silicone foam stabilizer AK-8805 into another reactor for mixing, control the stirring speed of the reactor to 300r / min, and control the temperature in the reactor to 70°C; after stirring for 20 minutes, add 25 parts of HFC-245fa into the reaction kettle and continue stirring for 15 minutes.

[0039] 3) Mix the materials in step (1) and step (2) through the gun head, and inject into the foaming target cavity for foaming to obtain ...

Embodiment 2

[0042] 1) 105 parts of vegetable oil polyol (derived from sesame oil) (hydroxyl value 400mgKOH / g), 7.5 parts of DBU and 7.5 parts of DBN, 6 parts of surfactant, 1 part of 1,6-hexanediol and 2 parts of diisoperoxide Propylbenzene was transferred to the reactor and stirred for 40min. The stirring speed of the reactor was 800r / min, and the temperature in the reactor was controlled to be 60°C; after stirring for 40min, 27.5 parts of HFC-365mfc were added to the reactor to continue stirring 25min.

[0043] 2) Add 50 parts of TDI, 50 parts of MDI, and 25 parts of silicone foam stabilizer AK-8805 into another reactor for mixing, control the stirring speed of the reactor to 350r / min, and control the temperature in the reactor to 60°C; after stirring for 25 minutes, add 27.5 parts of HFC-365mfc into the reaction kettle and continue stirring for 20 minutes.

[0044] 3) Mix the materials in step (1) and step (2) through the gun head, and inject them into the foaming target cavity for fo...

Embodiment 3

[0047] 1) Transfer 110 parts of vegetable oil polyol (derived from peanut oil) (hydroxyl value: 420 mgKOH / g), 12 parts of TBD and 8 parts of DBU, 7 parts of surfactant, 2 parts of glycerin and 2 parts of TMP to the reactor and stir for 35 minutes , the stirring speed of the reactor was 600r / min, and the temperature in the reactor was controlled to be 55°C; after stirring for 35 minutes, 27.5 parts of trifluoroiodomethane was added into the reactor and the stirring was continued for 23 minutes.

[0048] 2) Add 57 parts of MDI and 38 parts of carbodiimide modified MDI, 25 parts of silicone foam stabilizer AK-8805 into another reactor for mixing, control the stirring speed of the reactor to 270r / min, and control The temperature in the reaction kettle was 65° C.; after stirring for 23 minutes, 27.5 parts of trifluoroiodomethane was added into the reaction kettle and continued to stir for 17 minutes.

[0049] 3) Mix the materials in step (1) and step (2) through the gun head, and i...

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Abstract

The invention relates to the technical field of polyurethane foam materials, and particularly discloses a polyurethane foam material and a preparation method thereof, and the polyurethane foam material is prepared from vegetable oil polyol, isocyanate, a foaming agent, a catalyst, a surfactant, a chain extender, a cross-linking agent and a foam stabilizer as raw materials. A compound shown in theformula I is adopted as a surfactant, is high in activity, and can reduce the surface tension of a solution, form micelles and play a solubilizing role, so that materials are well dissolved, and the solubility of the materials is further improved; in addition, by controlling the mass ratio and reaction conditions of the vegetable oil polyol, the isocyanate, the foaming agent, the catalyst, the surfactant, the chain extender, the cross-linking agent and the foam stabilizer, foam holes are effectively and uniformly distributed, so that the heat conductivity coefficient of the polyurethane foaming material can be reduced, and the heat preservation performance of the polyurethane foaming material is improved.

Description

technical field [0001] The invention relates to the technical field of polyurethane foam materials, in particular to a polyurethane foam material and a preparation method thereof. Background technique [0002] Polyurethane foaming material is based on polymers, and a large number of cell structures are generated inside by physical or chemical methods. Polyurethane foam material is a polymer with repeating structural units of urethane chain segment made by the reaction of isocyanate and polyol. Due to the unique cell structure of the foam material endows it with a series of excellent properties, such as low density, heat and sound insulation, high specific strength, cushioning, good thermal insulation performance, etc., it is widely used in packaging, industry, agriculture, transportation, military, etc. It has a wide range of applications in the fields of industry, aerospace industry and daily necessities. Its thermal insulation performance is the best among all kinds of f...

Claims

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Application Information

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IPC IPC(8): C08G18/32C08G18/67C08G18/20C08J9/30C08J9/14C08G101/00C08L75/14
CPCC08G18/3206C08G18/36C08G18/2072C08G18/2063C08J9/30C08J9/147C08J9/146C08G2101/00C08J2375/14C08J2203/142C08J2203/144C08G18/3825C08G18/7621C08G18/7671C08G18/7664C08G18/797C08G18/725C08G18/7607C08G18/86C08G2110/0058C08J2375/04C08J9/144C08J9/0028C08L75/04C08K5/053C08K5/14C08K5/20C08L83/04C08G18/32C08G18/67C08J9/14C08J9/143C08K5/098
Inventor 郭凯蔡谨琳方正陶俊杰陶惠新陈可泉
Owner NANJING UNIV OF TECH
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