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A kind of preparation method of non-ionic water-based polythiourethane

A polythiourethane, non-ionic technology, applied in the field of water-based polyurethane, to achieve good environmental protection, excellent bonding performance, excellent ozone resistance effect

Active Publication Date: 2018-08-07
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] Through the analysis and research of the existing published related patents, the papers and patents involved are limited to the development of polythiourethane sealants, the compound components and synthesis methods used for polythiourethane resin lenses, and the research on catalysts for their synthesis Preparation method, there is no report on the preparation of non-ionic water-based polythiourethane

Method used

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  • A kind of preparation method of non-ionic water-based polythiourethane

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Embodiment 1

[0048] A kind of preparation method of nonionic waterborne polythiourethane that the present invention proposes, comprises the steps:

[0049] S1. Add 43.9g of isophorone diisocyanate to 15g of liquid polysulfide rubber LP3 that has been vacuum dehydrated at 110°C for 1 hour and raise the temperature to 100°C, keep it warm for 90min, cool the reaction system to 60°C with ice water, and then add A mixed solution of 8 g of trimethylolpropane-polyethylene glycol monoether with a number-average molecular weight of 1000 and 15 g of polyoxypropylene glycol with a number-average molecular weight of 1000, which was dehydrated in vacuum for 1 hour, was heated to 93°C and kept for 120 minutes to obtain a terminal isocyanate Polysulfide-based modified polyurethane prepolymer;

[0050] S2. Cool the isocyanate-terminated polysulfide-modified polyurethane prepolymer to 40°C, add 5.1g of diethylene glycol, 7.2g of 1,4-butanediol, 1.2g of trimethylolpropane, and 0.12g of octanoic acid Stanno...

Embodiment 2

[0053] A kind of preparation method of nonionic waterborne polythiourethane that the present invention proposes, comprises the steps:

[0054] S1. Add 61.4g of isophorone diisocyanate to 50g of liquid polysulfide rubber LP3 which has been vacuum dehydrated at 110°C for 1 hour and raise the temperature to 100°C, keep it warm for 90min, cool the reaction system to 60°C with ice water, and then add 8.9 g of trimethylolpropane-polyethylene glycol monoether with a number-average molecular weight of 1200 were vacuum-dehydrated for 1 hour, heated to 95°C, and kept for 120 minutes to obtain an isocyanate-terminated polysulfide-modified polyurethane prepolymer;

[0055] S2. Cool the isocyanate-terminated polysulfide-modified polyurethane prepolymer to 40°C, add 6g ethylene glycol, 6.7g neopentyl glycol, 2g glycerin, 0.12g stannous octoate and 0.15g dibutyltin dilaurate, Then add 40 mL of acetone to reduce the viscosity of the reaction system, raise the temperature to 70°C, and keep it ...

Embodiment 3

[0058] A kind of preparation method of nonionic waterborne polythiourethane that the present invention proposes, comprises the steps:

[0059] S1. Add 70.5g of dicyclohexylmethane diisocyanate to 30g of liquid polysulfide rubber LP33 which has been vacuum dehydrated at 110°C for 1 hour and heat up to 100°C, keep it warm for 90min, cool the reaction system to 60°C with ice water, and then add 20 g of polyethylene glycol with a number-average molecular weight of 1000, vacuum-dehydrated for 1 hour, heated to 95° C., and kept for 120 minutes to obtain a polysulfide-modified polyurethane prepolymer with terminal isocyanate groups;

[0060] S2. Cool the isocyanate-terminated polysulfide-modified polyurethane prepolymer to 40°C, add 5.6g 1,3-propanediol, 6.7g ethylene glycol, 1.1g pentaerythritol, 0.12g stannous octoate and 0.18g dilaurate butyl tin, then add 45mL acetone to reduce the viscosity of the reaction system, raise the temperature to 70°C, and keep it warm for 300 minutes t...

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Abstract

The invention discloses a preparation method of non-ionic water-based polysulfide ammonia ester. The preparation method comprises the steps that liquid polysulfide rubber, hydrophilic dihydric alcohol and isocyanate are mixed to react to synthesize an end isocyanate group polysulfide modified polyurethane prepolymer; the end isocyanate group polysulfide modified polyurethane prepolymer has a chain-extension reaction with a small molecule chain extender and a crosslinking agent to obtain isocyanate group polysulfide modified polyurethane, and the isocyanate group polysulfide modified polyurethane is emulsified to obtain a non-ionic water-based polysulfide ammonia ester dispersoid. The polymer performance is improved by introducing liquid polysulfide into the polyurethane structure, and the polysulfide ammonia ester is treated in a water-borne mode, so that the environmental performance of the water-based polysulfide ammonia ester is improved, and the using filed is enlarged. The non-ionic water-based polysulfide ammonia ester can be used by being mixed and matched with anionic and cationic resin, and is good in adhesive force, wear resistance, flexibility, compactibility, high and low temperature resistance, ozone resistance and oil resistance, low in wet and gas permeability, and particularly excellent in acid-base resistance and electrolyte resistance.

Description

technical field [0001] The invention relates to the technical field of waterborne polyurethane, in particular to a preparation method of nonionic waterborne polythiourethane. Background technique [0002] Water-based polyurethane is a kind of polymer material that can be dissolved in water or evenly dispersed in water. Because it uses water as the dispersion medium and has zero VOC emissions, it has been recognized by the environment; because of its excellent performance, it has been widely used in printing, textiles, etc. Finishing, leather finishing and other industries. [0003] The main chain of polysulfide molecule contains sulfur atoms, and the shrinkage of the vulcanized product is very small. The sealant made of it has good adhesion to various adherends, and has good ozone resistance, weather resistance, oil resistance, moisture and air permeability. Low transient, especially long-term water resistance, is an ideal material for waterproof sealant. Since Thiokol Com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/75C08G18/73C08G18/76C08G18/66C08G18/64C08G18/48C08G18/42C08G18/32C08G18/12C08J3/03C08L75/08C08L75/06
CPCC08G18/12C08G18/4081C08G18/4238C08G18/4804C08G18/6453C08G18/722C08G18/73C08G18/755C08G18/758C08G18/7614C08G18/7671C08J3/03C08J2375/06C08J2375/08C08G18/3206C08G18/6674
Inventor 许戈文陶灿黄毅萍鲍俊杰熊潜生程芹王继印韩飞龙
Owner ANHUI UNIVERSITY
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