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Synthesis process and application of vegetable oil-based modified isocyanate

A vegetable oil-based and isocyanate technology, which is applied in the field of vegetable oil-based modified isocyanate, can solve the problems of out-of-shape products, the inability to further increase the content of bio-based materials, and the difficulty of degrading flexible polyurethane foam.

Inactive Publication Date: 2020-10-27
江苏君晟家居科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the production process of soft polyurethane sponge relies heavily on petroleum-based polyurethane raw materials. The soft polyurethane foam produced in this way is not easy to degrade, and it is not easy to recycle the waste soft polyurethane sponge in the later stage; in order to improve the environmental protection effect, bio-based Materials In the production of flexible polyurethane foam, currently in production, bio-based materials are used instead of petroleum-based polyurethane raw materials, and a large amount of bio-based materials are invested, which is theoretically possible, but in the actual reaction process, other raw materials react quickly and mature quickly , the reaction of bio-based materials has not been completed, resulting in the shape of the product, and only part of the bio-based materials participate in the reaction, so that the current proportion of bio-based materials used in flexible polyurethane foam generally does not exceed 20%, or even less, and it is impossible to further improve bio-based materials. The content of the base material is a difficult problem in the industry

Method used

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  • Synthesis process and application of vegetable oil-based modified isocyanate

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The first step is the preparation of hydroxylated vegetable oil:

[0031] Modification of epoxy vegetable oil into hydroxylated vegetable oil, hydroxyl value 50-120mgKOH / g, refer to CN101186694 (CN101186694B);

[0032] The second step is the vegetable oil modified isocyanate:

[0033] Reaction of isocyanate and hydroxylated vegetable oil, modified TDI isocyanate content 30-42%, modified MDI isocyanate content 15-25%, modified TDI / MD mixed isocyanate content 18-35% %.

[0034] Isocyanates include: TDI, MDI, or a mixture of TDI and MDI.

[0035] The third step is the technology of flexible polyurethane foam:

[0036] Use hydroxylated vegetable oil, petroleum-based polyether polyol and petroleum-based polymer polyol, add catalyst, silicone oil surfactant, foaming agent, and react with vegetable oil-based isocyanate to obtain a high-vegetable oil-based soft gel containing 30%-50%. quality polyurethane foam.

[0037] Specific production steps:

[0038] 1. Preparation o...

Embodiment 1

[0047]Use a 500ml three-necked flask with a dropping funnel, add TDI: 350g into the three-necked flask, add 100g of hydroxylated vegetable oil A to the dropping funnel, heat the three-necked flask to 90-95°C, turn on the switch of the dropping funnel, and slowly add hydroxyl Add vegetable oil A in one hour, keep the temperature at 85-95°C, after adding, raise the temperature to 95-100°C, keep it warm for 2-4 hours, cool down to 40-60°C and discharge. The vegetable oil-based modified isocyanate JS-01 was obtained, the tested isocyanate content: 36.4%, viscosity (cps): 471 / 25°C, and vegetable oil-based content 21.1%.

Embodiment 2

[0049] Use a 500ml three-necked flask with a dropping funnel, add TDI: 200g into the three-necked flask, add 100g of hydroxylated vegetable oil A to the dropping funnel, heat the three-necked flask to 90-95°C, turn on the switch of the dropping funnel, and slowly add hydroxyl Vegetable oil A is added in one hour, and the temperature is maintained at 85-95°C. After the addition, the temperature is raised to 95-100°C, kept for 2-4 hours, cooled to 40-60°C and discharged to obtain vegetable oil-based modified isocyanate JS- 02. Tested isocyanate content: 30.4%, viscosity (cps): 556 / 25 degrees, vegetable oil base content 31.7%.

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Abstract

The invention relates to a synthesis process and application of vegetable oil-based modified isocyanate. Vegetable oil modified isocyanate is adopted, isocyanate and hydroxylated vegetable oil react,the content of modified TDI isocyanate radicals is 30%-42%, the content of modified MDI isocyanate radicals is 15%-25%, and the content of modified TDI / MD mixed isocyanate radicals is 18%-35%. The isocyanate comprises: TDI, MDI, or a mixture of TDI and MDI. Hydroxylated vegetable oil, petroleum-based polyether polyol, petroleum-based polymer polyol, a catalyst, a silicone oil surfactant and a foaming agent are mixed and react with vegetable oil-based isocyanate, and the high vegetable oil-based soft polyurethane foam plastic is obtained. The plant oil-based polyurethane foam has the advantagesthat the proportion of the plant oil-based material in the soft polyurethane foam is 30%-50%, great help is provided for reducing dependence on petroleum-based polyurethane raw materials and improving the degradation rate of the soft polyurethane foam, and powerful support is provided for national environmental protection policies.

Description

technical field [0001] The invention relates to the technical field of vegetable oil-based modified isocyanate, in particular to a synthesis process and application of vegetable oil-based modified isocyanate. Background technique [0002] Flexible Polyurethane Foam (Flexible Polyurethane Foam, referred to as polyurethane soft foam) refers to a type of flexible polyurethane foam with a certain degree of elasticity. It is the most widely used polyurethane product. The main products are high resilience foam (HRF), block sponge, slow resilience foam, self-skinned foam (ISF), and semi-rigid foam. The cell structure of polyurethane soft foam is mostly open. Generally, it has the properties of low density, good elastic recovery, sound absorption, breathability, heat preservation, etc. It is mainly used as furniture cushion material, vehicle seat cushion material, and various soft cushion laminated composite materials. Soft foam is also used as filter material, sound insulation ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/80C08G18/66C08G18/48C08G18/63C08G18/36C08J9/08C08G101/00
CPCC08G18/36C08G18/4072C08G18/48C08G18/4804C08G18/632C08G18/6696C08G18/8051
Inventor 虞兴东赵小萍张雪芳
Owner 江苏君晟家居科技有限公司
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