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Polyurethane flexible foam sponge and preparation method thereof

A polyurethane soft foam and sponge technology, which is applied in the field of polyurethane foam, can solve the problems of performance improvement and long foaming time of polyurethane soft foam, and achieve the effects of shortening foaming time, making foaming easier and improving conversion rate

Inactive Publication Date: 2019-09-27
JIAHUA CHEM TECH DEV SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is the defect that the foaming time of the existing polyurethane soft foam is long and the performance needs to be improved, and then a kind of environmentally friendly and efficient polyurethane soft foam sponge and its preparation method are provided

Method used

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  • Polyurethane flexible foam sponge and preparation method thereof
  • Polyurethane flexible foam sponge and preparation method thereof
  • Polyurethane flexible foam sponge and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0033] The present embodiment provides a soft polyurethane foam sponge, the preparation method of which is as follows:

[0034] 1) Mix the raw materials by the weight described in Table 1, and add them to the low-pressure foaming machine;

[0035] 2) Add 110g of toluene diisocyanate T80 into the low-pressure foaming machine, mix at a stirring speed of 4000 rpm under the conditions of a pressure of 1.6 bar and a temperature of 21°C for foaming reaction, and place it at a temperature of 22°C for 48 hours Afterwards obtain described polyurethane soft foam sponge.

[0036] Table 1

[0037] raw material Weight / g Polyether polyol: Jiahua Puranol F 3031K 100 water 8.0 Surfactant: Evonik Tegoamin SMP 1.0 Amine catalyst: EvonikKosmos K29 1.0 Organometallic catalyst: EvonikTegostab B8123 8.0 Methyl formate 25 index 120

Embodiment 2

[0039] The present embodiment provides a soft polyurethane foam sponge, the preparation method of which is as follows:

[0040] 1) Mix the raw materials by the weight stated in Table 2, and add them to the low-pressure foaming machine;

[0041] 2) Add 72.6g of toluene diisocyanate T80 into the low-pressure foaming machine, mix at a stirring speed of 4500 rpm under the conditions of a pressure of 1.7 bar and a temperature of 22°C, and perform a foaming reaction, and place it at a temperature of 23°C for 48 Obtain described polyurethane soft foam sponge after hour.

[0042] Table 2

[0043] raw material Weight / g Polyether polyol: Jiahua Puranol F 3031K 80 Polymer polyol: Jiahua Puranol PP 2045B 20 water 5.5 Surfactant: Evonik Tegoamin A33 0.15 Amine catalyst: EvonikKosmos K29 0.36 Organometallic catalyst: EvonikTegostab B8123 1.8 Methyl formate 7.1 index 120

Embodiment 3

[0045] The present embodiment provides a soft polyurethane foam sponge, the preparation method of which is as follows:

[0046] 1) Mix the raw materials by the weight described in Table 3, and add them to the low-pressure foaming machine;

[0047] 2) Add 68g of toluene diisocyanate T80 into the low-pressure foaming machine, mix at a stirring speed of 5000 rpm under the conditions of a pressure of 2.0 bar and a temperature of 23°C for foaming reaction, and place it at a temperature of 22°C for 48 hours Afterwards obtain described polyurethane soft foam sponge.

[0048] table 3

[0049] raw material Weight / g Polyether polyol: Jiahua Puranol F 3031K 100 water 4.8 Surfactant: Evonik Tegoamin A33 0.3 Amine catalyst: EvonikKosmos K29 0.2 Organometallic catalyst: EvonikTegostab B8110 2.0 calcium carbonate 100 Methyl formate 5.0 index 125

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Abstract

The invention discloses a polyurethane flexible foam sponge and a preparation method thereof. The polyurethane flexible foam sponge is composed of the following ingredients according to a certain weight ratio: polyether polyol+polymer polyol, a surfactant, an amine catalyst, an organometallic catalyst, a crosslinking agent, a filler, an auxiliary material, water, methyl formate and isocyanate. The preparation method comprises the following steps: mixing the above material except isocyanate, and adding the mixture into a low-pressure foaming machine; adding isocyanate into the low-pressure foaming machine, rapidly stirring and mixing, carrying out a foaming reaction, and standing to obtain the polyurethane flexible foam sponge. By using methyl formate as the foaming agent instead of dichloromethane, the foaming agent is environmentally-friendly; and the foaming is easier, thus improving conversion rate of the sponge product and saving use amount of a physical foaming agent.

Description

technical field [0001] The invention belongs to the field of polyurethane foam, and in particular relates to a soft polyurethane foam sponge and a preparation method thereof. Background technique [0002] Polyurethane soft foam, that is, soft polyurethane foam, is a kind of elastic soft polyurethane foam, which is the most used type of polyurethane products. It has porosity, low relative density, high specific strength, low thermal conductivity and corrosion resistance. , Easy to manufacture and other advantages, widely used in various industries, such as automobile industry, battery industry, cosmetics industry, furniture manufacturing industry, etc. [0003] Dichloromethane, abbreviated as MC or MEC, is widely used in polyurethane foaming, including ultra-low density polyurethane soft foam products, because the raw material is cheap and non-flammable. However, methylene chloride itself is highly toxic, and long-term exposure to methylene chloride in the working environmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/14C08L75/08C08G18/48C08G18/76C08G18/08C08G18/63C08K3/26C08K3/22C08G18/66C08G18/32C08K5/3492C08G101/00
CPCC08G18/08C08G18/3275C08G18/4072C08G18/48C08G18/632C08G18/6688C08G18/7621C08G2101/00C08J9/0028C08J9/0066C08J9/142C08J2203/12C08J2375/08C08K3/22C08K3/26C08K5/34922C08K2003/2227C08K2003/265
Inventor 柯其武关永坚汪胜李玉博
Owner JIAHUA CHEM TECH DEV SHANGHAI CO LTD
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