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Phenyl organic silicon modified polyurethane resin, preparation method and application thereof

A phenyl silicone and polyurethane resin technology, applied in the field of polyurethane resin, can solve the problems of single curing form, poor weather resistance, insufficient water resistance, etc., and achieves improved microphase separation, small differences in solubility parameters, and good stability. Effect

Active Publication Date: 2015-03-04
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of insufficient water resistance, poor weather resistance and single curing form in the prior art, and provide a simple phenyl silicone modified polyurethane resin and its preparation method and application

Method used

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  • Phenyl organic silicon modified polyurethane resin, preparation method and application thereof
  • Phenyl organic silicon modified polyurethane resin, preparation method and application thereof
  • Phenyl organic silicon modified polyurethane resin, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] 1. Preparation of phenyl silicone modified polyurethane resin

[0061] Preparation of amomethylphenyl polysiloxane

[0062] Dissolve 7.8g (0.06mol) dimethyl dichlorosilane in 70.2g toluene, then add dropwise to a solution containing 17.28g (0.08mol) diphenylsilanediol, 146.0g tetrahydrofuran (THF) and 9.5g (0.12 mol) in a reaction flask of pyridine. After reacting at 20°C for 5h, cool to room temperature, and filter under reduced pressure. After removing the solvent under reduced pressure, at 20°C, the low boiling point substances in the product were removed under reduced pressure by an oil pump to obtain a transparent liquid.

[0063] Preparation of imino-terminated methylphenylpolysiloxane

[0064] 10.4 g (0.04 mol) of γ-cyclohexylaminopropyltrimethoxysilane and 0.1 g of tetrabutyl titanate were added and reacted at 70° C. for 7 hours to prepare imino-terminated methylphenylpolysiloxane.

[0065] Preparation of Phenyl Silicone Modified Polyurethane Resin

[0066]...

Embodiment 2

[0070] 1. Preparation of phenyl silicone modified polyurethane resin

[0071] Preparation of hydroxy-terminated methylphenylpolysiloxane

[0072] After dissolving 3.9g (0.03mol) dimethyldichlorosilane and 4.7g (0.03mol) methylpropyldichlorosilane in 9.4g toluene, they were added dropwise to 12.32g (0.08mol) methylphenylsilane Diol, 17.3g of tetrahydrofuran (THF) solution and 9.5g (0.12mol) of pyridine in a reaction flask were reacted at 80°C for 2h. After cooling to room temperature, filter under reduced pressure. After removing the solvent under reduced pressure, the low boiling point substances in the product were removed under reduced pressure by an oil pump at 40°C to obtain a transparent liquid.

[0073] Preparation of amino-terminated methylphenylpolysiloxane

[0074] Add 7.2g (0.04mol) of γ-aminopropyltrimethoxysilane and 0.2g of tert-butyl titanate to hydroxyl-terminated methylphenylpolysiloxane, and react at 100°C for 10h to prepare amino-terminated terminal methy...

Embodiment 3

[0080] 1. Preparation of phenyl silicone modified polyurethane resin

[0081] Preparation of hydroxy-terminated methylphenylpolysiloxane

[0082] After dissolving 21.2g (0.06mol) methylcyclohexyl dichlorosilane in 42.4g toluene, add dropwise to a solution containing 17.28g (0.08mol) diphenylsilanediol, 7.8g tetrahydrofuran (THF) and 9.5g ( 0.12mol) of pyridine in a reaction flask, reacted at 50°C for 5h. After cooling to room temperature, filter under reduced pressure. After removing the solvent under reduced pressure, the low boiling point substances in the product were removed under reduced pressure by an oil pump at 40°C to obtain a transparent liquid.

[0083] Preparation of amino-terminated methylphenylpolysiloxane

[0084]Add 7.6g (0.04mol) of γ-aminopropylmethyldiethoxysilane and 0.01g of isopropyl titanate to hydroxyl-terminated methylphenyl polysiloxane, react at 80°C for 8h, and prepare amino end-blocked polysiloxane.

[0085] Preparation of Phenyl Silicone Modi...

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Abstract

The invention discloses a phenyl organic silicon modified polyurethane resin, a preparation method and application thereof, and belongs to the field of polyurethane resin. The structural formula of the phenyl organic silicon modified polyurethane resin is as shown in the description; the preparation method of the phenyl organic silicon modified polyurethane resin comprises the following steps: dissolving phenylsilanediol into an organic solvent, taking a reaction with chlorosilane (R<2>SiCH3Cl2) to prepare hydroxyl-terminated methyphenyl polysiloxane, under the action of a catalyst, mixing the hydroxyl-terminated methyphenyl polysiloxane with a silane compound to obtain amino or imino terminated methyphenyl polysiloxane, then in the atmosphere of argon, mixing diisocyanate, amino or imino terminated methyphenyl polysiloxane, polyethylene glycol or polyol with a mixed solvent, and taking a reaction to obtain the phenyl organic silicon modified polyurethane resin. The phenyl organic silicon modified polyurethane resin has the advantages of being capable of reducing the water absorption, improving the hydrophobicity, and improving the compatibility of organic silicon and polyurethane, and can be prepared to thin film with good properties; the preparation method is simple and feasible.

Description

technical field [0001] The invention relates to a phenyl organosilicon modified polyurethane resin and a preparation method and application thereof, belonging to the field of polyurethane resins. Background technique [0002] Polyurethane coating has the characteristics of excellent high elasticity, strong mechanical impact resistance at low temperature, excellent chemical resistance and high reactivity, etc. It is a low VOC environmental protection coating. Polyurethane coatings are widely used as aircraft exterior wall coatings, wood coatings, machine tool and instrumentation coatings, etc. However, polyurethane coatings also have disadvantages such as poor water resistance and thermal stability, which limit the wide application of polyurethane materials. [0003] From the perspective of molecular structure, polysiloxane material is composed of Si-O-Si bond alternating skeleton, which has the characteristics of both organic polymer and inorganic compound. The bond energy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/61C08G18/48C08G18/44C08G18/42C08G77/388C08G77/16C08J5/18C08L75/04
CPCC08G18/4009C08G18/4277C08G18/44C08G18/48C08G18/4833C08G18/61C08G18/73C08G18/755C08G18/758C08G18/7614C08G18/7642C08G18/7671C08G77/04C08G77/388C08J5/18C08L75/04
Inventor 唐红定徐四喜熊英
Owner WUHAN UNIV
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