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Hydroxyl scavenging compound and preparation method and purpose thereof

A compound and alkyl technology, which is applied in the field of hydroxyl scavenger, can solve the problems of reducing the chemical bond between the filler surface and the polymer, and the deterioration of the mechanical properties of silicone rubber, so as to improve the tear resistance, mechanical properties, and storage stability. Improved effect

Active Publication Date: 2013-02-06
GUANGZHOU HUITIAN FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the filler is surface-treated with a treatment agent such as hexamethyldisilazane, the active groups on the surface are reduced and replaced by non-reactive methyl groups, thus reducing the gap between the filler surface and the polymer. The role of chemical bonds, resulting in poor mechanical properties of silicone rubber

Method used

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  • Hydroxyl scavenging compound and preparation method and purpose thereof
  • Hydroxyl scavenging compound and preparation method and purpose thereof
  • Hydroxyl scavenging compound and preparation method and purpose thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] The preparation of formula (1-1) compound (wherein R 1 = R 2 = R 3 = n-pentadecyl, R 4 = phenyl-substituted n-tetradecyl, A = -CH 2 CH 2 OCH 2 CH 2 -)

[0083]

[0084] Add 105.7g and 163.6g of

[0085]

[0086] Gently shake the flask to allow the reactants to mix evenly, slowly heat the mixture to 50°C, then drop 4g of chloroplatinic acid-isopropanol solution (the concentration of platinum in this chloroplatinic acid-isopropanol solution is 1000 μg / g ; Based on the total mass of reactants, the concentration of platinum is about 15 μg / g). The reaction was exothermic violently, and when the exotherm ceased (about 15 min), the reaction was terminated. Afterwards, use a vacuum pump to directly evacuate the obtained mixture to a vacuum degree of less than -0.098MPa, and remove the low boilers. The yield of the resulting product is 85%, and the characterization data are as follows:

[0087] 1 H-NMR (CDCl 3 , δppm): 0.96 (18H, t), 1.33 (12H, m), 1.29 (212H,...

Embodiment 2

[0089]The preparation of formula (1-2) compound (wherein R 1 =R 2 = Cyclohexyl substituted with ethoxy, R 3 =R 4 =n-butyl substituted cyclooctyl, A=-(CH 3 )CH-CH 2 -)

[0090]

[0091] Add 110.5g and 185.3g of

[0092]

[0093] Gently shake the flask to allow the reactants to mix evenly, slowly heat the mixture to 70°C, then drop 8g of chloroplatinic acid-isopropanol solution (the concentration of platinum in this chloroplatinic acid-isopropanol solution is 1000 μg / g ; Based on the total mass of the reactants, the concentration of platinum is about 27 μg / g), the reaction is violently exothermic, and when the exothermic stops (about 15min), the reaction ends. Afterwards, use a vacuum pump to directly evacuate the obtained mixture to a vacuum degree of less than -0.098MPa, and remove the low boilers. The yield of the resulting product is 80%, and the characterization data are as follows:

[0094] 1 H-NMR (CDCl 3 , δppm): 0.96(18H, t), 1.33(12H, m), 1.29(12H, m), ...

Embodiment 3

[0096] The preparation of formula (1-3) compound (wherein R 1 =R 2 = naphthyl, R 3 = n-nonyl, R 4 = n-octyl substituted by phenyl, A=-(CH 2 ) 2 -CH(OCH 3 )CH(CH 3 )CH 2 -)

[0097]

[0098] Add 135.2g and 188.7g of

[0099]

[0100] Gently shake the flask to allow the reactants to mix evenly, slowly heat the mixture to 70°C, then drop 5g of chloroplatinic acid-isopropanol solution (the concentration of platinum in this chloroplatinic acid-isopropanol solution is 1000 μg / g ; Based on the total mass of the reactants, the concentration of platinum is about 15.4 μg / g), the reaction is violently exothermic, and when the exothermic stops (about 15min), the reaction ends. Afterwards, use a vacuum pump to directly evacuate the obtained mixture to a vacuum degree of less than -0.098MPa, and remove the low boilers. The yield of the resulting product is 80%, and the characterization data are as follows:

[0101] 1 H-NMR (CDCl 3 , δppm): 0.96 (6H, t), 1.33 (4H, m), 1.29...

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PUM

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Abstract

The invention relates to a compound with a formula I, wherein R1, R2, R3, R4 and A have the meaning given in the text. Besides, the invention also relates to the preparation method of the compound and purposes of the compound in surface modification of filling material.

Description

technical field [0001] The present invention relates to a compound for scavenging hydroxyl groups, its preparation method and its use. More specifically, it relates to a hydroxyl scavenger for surface modification of fillers used in silicone rubber, a preparation method and use. Background technique [0002] Silicone rubber usually needs to be reinforced with fillers before it has any application value. Commonly used reinforcing fillers include calcium carbonate, gas-phase method or precipitated silica, etc. These fillers are easy to absorb water and get damp, resulting in poor compatibility between the filler and silicone rubber, and the free water or bound water on the surface of these fillers will The catalyst and crosslinking agent in the silicone rubber system are consumed, resulting in a serious attenuation of the vulcanization characteristics of the silicone rubber as the storage time prolongs. In the actual production of silicone rubber, fillers often undergo dehyd...

Claims

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Application Information

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IPC IPC(8): C07F7/18C09C1/28C09C3/12C08K9/06C08K3/36C08L83/04
Inventor 乐小飞徐珊赵勇刚
Owner GUANGZHOU HUITIAN FINE CHEM
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