Vegetable oil polyols with high hydroxyl value as well as preparation method and application of vegetable oil polyols

A technology of vegetable oil polyols and high hydroxyl value, which is applied in the preparation of organic compounds, the preparation of ester groups and hydroxyl groups, and the preparation of ethers, etc. It can solve the problems of prone to cross-linking side reactions, low product quality, and cumbersome post-processing. , to achieve the effect of novel structure, low viscosity and side reaction control

Active Publication Date: 2016-06-15
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the above patents, the synthesis of vegetable oil polyols is based on double bond epoxy and then ring-opening. The ring-opening reagents mainly use small molecule alcohols, alcohol amines or carboxylic acids, but the product quality is not high, the post-treatment is cumbersome, and the reaction is easy. There are problems such as cross-linking side reactions, and it is still necessary to compound a certain proportion of petrochemical polyols when applied to polyurethane materials

Method used

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  • Vegetable oil polyols with high hydroxyl value as well as preparation method and application of vegetable oil polyols
  • Vegetable oil polyols with high hydroxyl value as well as preparation method and application of vegetable oil polyols
  • Vegetable oil polyols with high hydroxyl value as well as preparation method and application of vegetable oil polyols

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Mix 100g epoxidized soybean oil, 149g polyol (the product of the reaction between pentaerythritol and equimolar propylene oxide) and 0.04g sodium methylate, place in a conventional kettle-type reactor, pass into nitrogen protection, mechanically stir, and heat up to 190°C, stop the reaction after 3 hours of reaction to obtain soybean oil polyol with a hydroxyl value of 750 mgKOH / g and a viscosity of 2850 mPa·s.

Embodiment 2

[0044] Take 100g of epoxidized peanut oil as component A, and another 0.1g of tetrabutyl titanate is dissolved in 108g of polyol (the product of the reaction between ethylene glycol and twice the mole of propylene oxide) as component B, and A, Component B is pumped into the microchannel modular reaction device at the same time, and the reaction is carried out in the sandwichreactorHC at normal pressure and 180°C. The injection rates of A and B components are 1.5mL / min and 1.6mL / min respectively, and the reaction is maintained. The residence time was 12 minutes, and the reaction product was collected to obtain the peanut oil polyol with a hydroxyl value of 477 mgKOH / g and a viscosity of 2800 mPa·s.

Embodiment 3

[0046] Get 100g epoxy tung oil as component A, and get 0.04g sodium tert-butoxide and dissolve it in 133g polyol (product of 1,2-propanediol and equimolar propylene oxide reaction) in addition, it is component B, mix A, Component B was pumped into the microchannel modular reaction device at the same time, and reacted in the Hastelloy microchannel reactor at normal pressure and 200 ° C. The injection rates of A and B components were 0.9 mL / min and 1.1 mL / min, respectively. mL / min, keep the reaction residence time 10min, collect the reaction product to obtain tung oil polyol, its hydroxyl value is 627mgKOH / g, and its viscosity is 2650mPa·s.

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Abstract

The invention discloses vegetable oil polyols with high hydroxyl value as well as a preparation method and an application of the vegetable oil polyols. The vegetable oil polyols are prepared from epoxidized vegetable oil and a polyhydroxyl compound through a ring-opening reaction and transesterification. Compared with the prior art, a novel ring-opening reagent is used, the prepared vegetable oil polyols are novel in structure and low in viscosity, has high hydroxyl value and primary hydroxyl content and short pendant chains, are distributed more uniformly and can completely replace traditional petrochemical polyols to be applied to preparation of a polyurethane foam material. Meanwhile, the method adopts simple process, postprocessing is not needed for a product, the method is quite suitable for industrial production, the reaction efficiency can be increased especially after selection of a tubular reactor, generation of side reactions is controlled, and energy consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical materials and their production, and relates to a high-hydroxyl vegetable oil polyol and its preparation method and application. The vegetable oil polyol synthesized by the invention is suitable for preparing polyurethane materials. Background technique [0002] Polyurethane is a polymer with repeating structural units of urethane segments produced by the reaction of isocyanate and polyol. Polyurethane products are divided into two categories: foamed products and non-foamed products. Foamed products include soft, rigid and semi-rigid polyurethane foams; non-foamed products include coatings, adhesives, synthetic leather, elastomers and Elastic fibers etc. Polyurethane materials have excellent performance, wide range of uses, and many types of products, among which polyurethane foam is the most widely used. [0003] There are three main types of polyols used in polyurethane. One is a polymer obtai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/31C07C69/708C08G18/67C08G101/00
CPCC07C41/03C07C67/03C07C67/31C07C69/708C08G18/36C08G2101/00C07C43/132Y02P20/10
Inventor 郭凯方正季栋陶惠新欧阳平凯
Owner NANJING TECH UNIV
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