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Preparation method of bio-based modified rigid foam polyether polyol

A polyether polyol and bio-based technology, which is applied in the field of preparation of bio-based modified rigid polyether polyol, can solve the problems of polyurethane product performance impact, product property difference, and product composition complexity, etc., to achieve promotional significance Significant, high solubility, simple preparation process effect

Active Publication Date: 2021-06-18
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are two main preparation methods for bio-based polyols: one is to directly use small-molecule polyols and oils for transesterification to obtain alcoholysis products with a certain hydroxyl value and functionality, but the components of the products prepared in this way are relatively complicated. The properties of the products are quite different; another method is to carry out the epoxidation reaction of double bonds first for the oils containing unsaturated double bonds, and then the epoxy ring-opening to prepare bio-oil polyols, but some oils do not contain double bonds The ingredients account for a certain proportion. Such ingredients do not participate in the reaction and have an impact on the performance of polyurethane products.

Method used

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  • Preparation method of bio-based modified rigid foam polyether polyol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 500 g of palm oil, 90 g of glycerin, and 4 g of sodium hydroxide into the reactor, raise the temperature to 170° C., and stir for 4 hours to prepare a modified palm oil sample. The tested hydroxyl value is 163 mgKOH / g. Add 320g of sucrose and 175g of diethylene glycol into a 2.5L polymerization reactor, then punch the polymerization reactor, check to ensure good sealing, carry out nitrogen replacement 5 times, and then evacuate to a vacuum degree of -0.093MPa, Weigh 11g of 40% dimethylamine aqueous solution, pump it into the reaction kettle under vacuum, set the heating temperature at 85°C, and start adding propylene oxide dropwise at 80°C, keep the temperature between 80-85°C, and the air pressure at 0.1-0.5 MPa, when the amount of propylene oxide added is 183g, stop feeding propylene oxide and mature for 1h, then raise the temperature to 110°C, continue to drop 458g of propylene oxide, and mature for 1h, as the aging reaction proceeds, the reaction kettle The pres...

Embodiment 2

[0034] Add 500g of soybean oil, 90g of glycerin, and 4g of sodium hydroxide into the reactor, raise the temperature to 170°C, and stir for 4 hours to prepare a modified soybean oil sample. The tested hydroxyl value is 172mgKOH / g. Add 320g of sucrose and 175g of diethylene glycol into a 2.5L polymerization reactor, then punch the polymerization reactor, check to ensure good sealing, carry out nitrogen replacement 5 times, and then evacuate to a vacuum degree of -0.093MPa, Weigh 11g of 40% dimethylamine aqueous solution, pump it into the reaction kettle under vacuum, set the heating temperature at 85°C, and start to add propylene oxide dropwise at 80°C, keep the temperature between 80-85°C, until the added cyclic When the amount of propylene oxide is 183g, stop feeding propylene oxide and mature for 1h, then raise the temperature to 110°C, continue to add 458g of propylene oxide dropwise, and mature for 1h, as the aging reaction proceeds, the pressure in the reactor gradually dro...

Embodiment 3

[0037]Add 500g of soybean oil, 90g of glycerin, and 4g of sodium hydroxide into the reactor, raise the temperature to 170°C, and stir for 4 hours to prepare a modified soybean oil sample. The tested hydroxyl value is 172mgKOH / g. Add 320g of sucrose and 175g of diethylene glycol into a 2.5L polymerization reactor, then punch the polymerization reactor, check to ensure good sealing, carry out nitrogen replacement 3 times, and then evacuate to a vacuum degree of -0.093MPa, Weigh 11g of 40% dimethylamine aqueous solution, pump it into the reaction kettle under vacuum, set the heating temperature at 85°C, and start to add propylene oxide dropwise at 80°C, keep the temperature between 80-85°C, until the added cyclic When the amount of propylene oxide is 183g, stop feeding propylene oxide and mature for 1h, then raise the temperature to 110°C, continue to add 458g of propylene oxide dropwise, and mature for 1h, as the aging reaction proceeds, the pressure in the reactor gradually drop...

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Abstract

The invention relates to a preparation method of bio-based modified rigid foam polyether polyol, which belongs to the technical field of polyether polyol synthesis. The present invention comprises the following steps: (1) preparing modified vegetable oil: adding alcohol compound or alcohol amine compound and catalyst 1 into vegetable oil to obtain modified vegetable oil; Initiator is added into the reaction kettle, and the amine catalyst is sucked in by vacuum; (3) Polymerization reaction in the medium temperature section: continue to add propylene oxide dropwise, and add 40-60% of the total mass of propylene oxide dropwise at this stage; (4) High temperature Stage polymerization reaction: pump the prepared modified vegetable oil into the reactor, stir and mix evenly, and continuously drop propylene oxide to complete. The invention selects the catalyst, and obtains the modified vegetable oil through the transesterification reaction between the oil and the small molecular polyol. The modified vegetable oil contains a certain hydroxyl value and functionality, and can further react with propylene oxide itself.

Description

technical field [0001] The invention relates to a preparation method of bio-based modified rigid foam polyether polyol, which belongs to the technical field of polyether polyol synthesis. Background technique [0002] At present, rigid foam polyethers are petroleum-based products prepared from sucrose, sorbitol, glycerin, diethylene glycol, propylene glycol, etc. as initiators, and propylene oxide as a chain extender. Bio-based polyols are oligomer polyols obtained from animals and plants. They are renewable resources with low cost and rich sources. With the gradual depletion of petroleum resources, the prospects for bio-based polyols to replace petroleum-based polyols are increasingly broad . [0003] At present, there are two main preparation methods for bio-based polyols: one is to directly use small-molecule polyols and oils for transesterification to obtain alcoholysis products with a certain hydroxyl value and functionality, but the components of the products prepared...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/28
CPCC08G65/2609
Inventor 宁晓龙白维坤程铸洪刘忠杰
Owner SHANDONG INOV NEW MATERIALS CO LTD