Tung oil polyhydric-alcohol-based nonionic polyurethane capable of being crosslinked later and preparation thereof

A technology of tung oil polyol and polyurethane, which is applied in the field of polymer materials, can solve problems such as non-ionic water-based polyurethane research reports that have not yet been seen, and achieve the effects of facilitating industrial production and popularization and application, improving utilization rate, and reducing dependence

Inactive Publication Date: 2016-06-29
HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there has been no research report on crosslinkable nonionic waterborne polyurethane based on hydroxylated tung oil

Method used

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  • Tung oil polyhydric-alcohol-based nonionic polyurethane capable of being crosslinked later and preparation thereof
  • Tung oil polyhydric-alcohol-based nonionic polyurethane capable of being crosslinked later and preparation thereof
  • Tung oil polyhydric-alcohol-based nonionic polyurethane capable of being crosslinked later and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: Synthesis of HTO-based nonionic polyurethane by MDI-50

[0030] Add PEG with a molecular weight of 800 (PEG-800) and alcoholysis HTO that have been vacuum dehydrated in advance into a four-necked flask equipped with a nitrogen protection device, add the calculated amount of MDI-50, and heat up to 70°C for about 50 minutes. During the reaction process, a certain amount of NMP is properly added to adjust the viscosity of the system. When the NCO in the reaction system reaches the theoretical value, add distilled water, stir and emulsify at a high speed, and discharge the product to obtain a product with a solid content of 30% (referred to as HTO -NPUD). The resulting emulsion had an HLB of 9.4.

[0031] The molar ratio of the main raw materials: MDI-50: alcoholysis HTO: PEG-800 = 2:1:1

Embodiment 2

[0032] Embodiment 2: Synthesize HTO nonionic polyurethanes of different molar ratios by MDI-50

[0033] Add PEG-800 and alcoholysis HTO, which have been pre-vacuum-dehydrated, into a four-necked flask equipped with a nitrogen protection device, add the calculated amount of MDI-50, and heat up to 70°C for about 40 minutes. During the reaction, a certain amount of NMP is properly added to adjust the viscosity of the system. When the NCO in the reaction system reaches the theoretical value, add distilled water, stir and emulsify at a high speed, and discharge the product to obtain a product with a solid content of 30% (referred to as MDI -NPUD-2). The resulting emulsion had an HLB of 6.8.

[0034] The molar ratio of the main raw materials: MDI-50: alcoholysis HTO: PEG-800 = 3:2:1

Embodiment 3

[0035] Embodiment 3: Synthesize HTO-based nonionic polyurethanes of different molar ratios by MDI-50

[0036] Add PEG-800 and alcoholysis HTO, which have been pre-vacuum-dehydrated, into a four-necked flask equipped with a nitrogen protection device, add the calculated amount of MDI-50, and heat up to 70°C for about 40 minutes. During the reaction, a certain amount of NMP is properly added to adjust the viscosity of the system. When the NCO in the reaction system reaches the theoretical value, add distilled water, stir and emulsify at a high speed, and discharge the product to obtain a product with a solid content of 30% (referred to as MDI -NPUD-3). The resulting emulsion had an HLB of 5.3.

[0037] The molar ratio of the main raw materials: MDI-50: alcoholysis HTO: PEG-800 = 4:3:1.

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Abstract

The invention discloses tung oil polyhydric-alcohol-based nonionic polyurethane capable of being crosslinked later and a preparation thereof, and belongs to the technical field of polymer synthesis. A mixture (MDI-50) of conjugated double bond containing tung oil polyhydric alcohol (or called hydroxylated tung oil (HTO)) subjected to alcoholysis or aminolysis, polyethylene glycol (PEG) and 4,4'-benzhydryl diisocyanate / 2,4'-benzhydryl diisocyanate or 4,4'-hexamethylene diisocyanate (HMDI) and the like are adopted as raw materials, the reaction conditions are controlled to make the raw materials including reactive hydrogen react with isocyanate by controlling reaction conditions, viscosity is controlled, and nonionic polyurethane dispersion liquid (HTO-NPUD) which has hydrophilic units and oleophilic units at the same time, comprises a conjugated double bond structure, and can be stable in all pH values is generated. Compared with common polyether type nonionic polyurethane, nonionic polyurethane containing three tung oil conjugated double bonds can be stable in an acid-base medium, the surface tension is obviously reduced, HLB can be adjusted according to the content of a hard segment, and the tung oil polyhydric-alcohol-based nonionic polyurethane is expected to serve as a functional type nonionic polyurethane stabilizing agent, and is used for preparation of polyurethane alloy.

Description

technical field [0001] The invention relates to tung oil polyol-based post-crosslinkable nonionic polyurethane and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] The modern polymer material industry, including polyurethane, is developed on the basis of the petrochemical industry. To date, almost all polymers are derived from petrochemicals, and the vast majority of materials are not biodegradable. Therefore, seeking efficient, cheap, renewable and sustainable new resources, as well as exploring and researching environmentally friendly green materials, must become an important topic for human survival and development and to solve environmental pollution. [0003] Polyurethane is a kind of multi-block polymer composed of soft and hard segments with excellent comprehensive performance and strong hydrogen bond interaction. It is widely used in various fields of industry, agriculture and daily life, and has long become an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/75C08G18/67C08G18/66
CPCC08G18/36C08G18/6696C08G18/758C08G18/7671
Inventor 任志勇任百霞杨小敏姜垒王华芬付阳刘文涛曹继红肖汉雄
Owner HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
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