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Piperazinyl propyl silane and preparation method thereof

A technology of propyl propyl silane and piperazine, which is applied in the field of piperazine propyl silane and its preparation, can solve the problems of poor softness, easy yellowing, and poor fabric smoothness of amino silicone oil, and achieves low viscosity and good thermal stability. , prepare a simple effect

Inactive Publication Date: 2018-02-02
GBXF SILICONES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of poor softness of traditional amino silicone oils in the prior art, poor smoothness of processed fabrics and easy yellowing, the present invention provides a piperazinyl propyl silane and a preparation method thereof, which can realize the affinity of amino silane Good water resistance, the treated fabric has good hydrophilicity and softness

Method used

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  • Piperazinyl propyl silane and preparation method thereof
  • Piperazinyl propyl silane and preparation method thereof
  • Piperazinyl propyl silane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A piperazinylpropylsilane

[0030]

[0031] where R1 is CH 2 、C 2 h 4 or C 3 h 6 ; R2 is CH 3 、C 2 h 5 or C 3 h 7 .

[0032] A piperazinyl propyl silane coupling agent is on the same ring as the secondary amino group and the tertiary amino group. The fabric obtained by using this silane treatment has better softness than traditional amino silicone oil; and the smoothness is improved compared with traditional silicone oil. The fabric has a good fluffy feel, and the yellowing of the fabric is greatly reduced. After the fabric is softened and stripped, it is easy to change and dye, and the finished fabric has good hydrophilicity; the finishing solution is not easy to stick to the roller.

Embodiment 2

[0034] A preparation method of piperazinyl propyl silane, comprising the steps of:

[0035] A. Add anhydrous piperazine and a non-polar solvent into a three-necked bottle at room temperature, and the molar ratio of the three is 1:2; the non-polar solvent refers to toluene.

[0036] B. Raise the temperature of the three-necked bottle to 110°C, slowly add γ-chlorosilane dropwise, and stir, the molar ratio of the total amount added to anhydrous piperazine is 1:2; the dropping speed of the γ-chlorosilane It is 2mol / h.

[0037] C. After the dropwise addition, keep the temperature at 120°C for 3 hours; the pressure of the heating reaction is 0.5MPa.

[0038] D. After heat preservation, it is automatically cooled to normal temperature, filtered to remove salt, and a piperazinylpropylsilane solution is obtained; in the above step E, the solid-liquid separation method is used to obtain the upper layer solution first, and the product is obtained by distillation of the upper layer solut...

Embodiment 3

[0051] A preparation method of piperazinyl propyl silane, comprising the steps of:

[0052] A. Anhydrous piperazine and non-polar solvent are added to the three-necked bottle at normal temperature, and the molar ratio of the three is 1:2; the non-polar solvent refers to the mixed solvent of n-hexane and cyclohexane, The ratio can be 1:1, and other ratios can also be selected according to requirements.

[0053] B. Raise the temperature of the three-necked bottle to 160°C, slowly add γ-chlorosilane dropwise, and stir, the molar ratio of the total amount added to anhydrous piperazine is 1:2; the dropping speed of the γ-chlorosilane It is 3mol / h.

[0054] C. After the dropwise addition, keep the temperature at 120°C for 4 hours; the pressure of the heating reaction is 0.8MPa.

[0055] D. After heat preservation, it is automatically cooled to normal temperature, filtered to remove salt, and a piperazinylpropylsilane solution is obtained; in the above step E, the solid-liquid sepa...

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Abstract

The invention discloses piperazinyl propyl silane and a preparation method thereof, belonging to the field of chemical engineering and manufacturing. Specific to the problems in the prior art that traditional amino silicon oil is poor in softness, poor in smooth performance of a fabric subjected to processing and easy to turn yellow, the invention provides the piperazinyl propyl silane and the preparation method thereof, and the method comprises the steps of adding water-free piperazine and a non-polar solvent into a three-necked bottle at normal temperature, heating the three-necked bottle, dropwise adding gamma-chlorosilane slowly and stirring, maintaining temperature after finishing dropwise adding, self-cooling the mixture to the normal temperature after maintaining the temperature fora period of time, and filtering to remove salt to obtain a piperazinyl propyl silane solution. The piperazinyl propyl silane can realize that the amidogen silane has good hydrophilia, and the processed fabric has good hydrophilia and softness.

Description

technical field [0001] The invention relates to the field of chemical manufacturing, in particular to a piperazinylpropylsilane and a preparation method thereof. Background technique [0002] Organoalkoxysilanes having amino groups (aminosilanes for short) are used in particular as adhesion promoters, as crosslinkers for curable compositions and as building components of silane-functional polymers. Aminosilanes having primary amino groups ("primary aminosilanes") are widely used because of their simple manufacturability; however, they have some disadvantages in use. Due to the relatively hydrophilic primary amino groups, they are prone to undesired moisture absorption, which can adversely affect the adhesion of cured materials to substrates under the influence of moisture. When used as a building component of silane-functional polymers obtained by adducting isocyanate-functional polyurethane polymers with aminosilanes, primary amino groups lead to high viscosity, causing di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/18D06M13/513
CPCC07F7/1804C07F7/1892D06M13/513D06M2200/11D06M2200/25D06M2200/50
Inventor 席日勇
Owner GBXF SILICONES CO LTD