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Polysiloxane binary alcohol with polyether block and preparation method thereof

A technology of polysiloxane and polyether blocks, which is applied in the field of polymer material intermediate polysiloxane diol and its preparation, can solve the problems of low reactivity, hydrolysis resistance and poor storage stability, and achieve good Storage stability, improvement of low reactivity, wide range of application effects

Active Publication Date: 2009-03-11
兰州科天水性科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a polysiloxane diol with polyether block and its preparation method, in order to overcome the problems of poor hydrolysis resistance, storage stability and low reactivity of the existing polysiloxane diol, and at the same time improve the silicone Mechanical properties of alkane-modified copolymers

Method used

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  • Polysiloxane binary alcohol with polyether block and preparation method thereof
  • Polysiloxane binary alcohol with polyether block and preparation method thereof
  • Polysiloxane binary alcohol with polyether block and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] 149.0g octamethylcyclotetrasiloxane (D 4 ) and 13.4g of tetramethyldisiloxane were added to a dry 500mL three-necked flask equipped with a thermometer, condenser and stirring, and then 1.62g of concentrated sulfuric acid was added to react at 45°C for 48h; the product was washed with deionized water , Distilled under reduced pressure to obtain 146 g of linear dihydrogen-terminated polysiloxane (HPDMS).

[0032] Add the above 146g HPDMS into a 500mL three-necked flask, and then add 80.5g monoallyl-terminated polyethylene oxide (MAPEO, M n =350), when the temperature was raised to 80°C, 0.65 mL of chloroplatinic acid solution was added, and the temperature was continued to rise to 100°C and reacted at 100°C for 5 h. After the unreacted MAPEO and catalyst were washed away with deionized water, 216 g of polyether block polysiloxane diols were obtained by distillation under reduced pressure.

[0033] attached figure 1 The final product of this embodiment is given 1 H nuc...

Embodiment 2

[0037] 238.4g D 4 Add 13.4g of tetramethyldisiloxane into a dry 500mL three-necked flask equipped with a thermometer, condenser and stirring, then add 1.26g of trifluoroacetic acid, react at 45°C for 72h; wash the product with deionized water , Distilled under reduced pressure to obtain 213g HPDMS.

[0038]Add above-mentioned 213g HPDMS in 500mL there-necked bottle, then add 80.5g MAPEO (M n =350), when the temperature was raised to 80°C, 0.89 mL of chloroplatinic acid solution was added, and the temperature was continued to rise to 100°C and reacted at 100°C for 5 h. After the unreacted MAPEO and the catalyst were washed away with deionized water, 281 g of polyether block polysiloxane diols were obtained by distillation under reduced pressure.

[0039] The infrared spectrogram of the resulting final product is attached figure 2 .

Embodiment 3

[0041] 112g hexamethylcyclotrisiloxane (D 3 ) and 13.4g of tetramethyldisiloxane were added to a dry 500mL three-necked flask equipped with a thermometer, condenser and stirring, and then 1.3g of concentrated sulfuric acid was added to react at 45°C for 48h; the product was washed with deionized water , Distilled under reduced pressure to obtain 118g HPDMS.

[0042] Add above-mentioned 118g HPDMS in 500mL there-necked bottle, then add 80.5gMAPEO (M n =350), when the temperature was raised to 80°C, 0.65 mL of chloroplatinic acid solution was added, and the temperature was continued to rise to 100°C and reacted at 100°C for 5 h. After the unreacted MAPEO and the catalyst were washed away with deionized water, 195 g of polyether block polysiloxane diol was obtained by distillation under reduced pressure.

[0043] The infrared spectrogram of the resulting final product is attached figure 2 .

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Abstract

The invention discloses polyether block polysiloxane diol and a method for preparing the same. The method is characterized by comprising the following steps: performing ring-opening polymerization through cyclic siloxane and dihydro terminated disiloxane first to obtain dihydro terminated polysiloxane, and then performing hydrosilylation reaction with mono-vinyl terminated polyether oligomer to form the polyether block polysiloxane diol the structural formula of which is shown in the graph, wherein R1 and R2 are CH3 and CH2CH3 and / or CH2CH2CH3 respectively, R3 is H or CH3, n is an integer between 1 and 1, 000, and p and q are integers between 1 and 100. The polyether block polysiloxane diol prepared by the method has the advantages of better hydrolysis resistance and storage stability, and high reactivity; in addition, the polyether block polysiloxane diol improves the problem of the unsatisfactory mechanical property of the prior siloxane diol in modifying copolymers.

Description

technical field [0001] The invention belongs to the technical field of polymer material intermediate polysiloxane diol and its preparation method, and in particular relates to polyether oligomer block polysiloxane diol and its preparation method. Background technique [0002] Due to the presence of terminal hydroxyl groups in polysiloxane diols, they are often used as intermediates to prepare various coatings such as polyurethanes and polyesters, high polymer thermoplastic elastomers, and foamed thermoplastics. Materials prepared with polysiloxane diols as intermediates have been widely used in many fields due to their excellent water resistance, aging resistance, surface properties and good biocompatibility. [0003] Chinese patent CN90105777.0 introduces a method for preparing low-molecular-weight α, ω siloxane diols. Under the action of an acidic catalyst, alkoxysilane is hydrolyzed twice, so that both ends of the siloxane have hydroxyl functional groups. Because the hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/46
Inventor 张兴元李维虎戴家兵
Owner 兰州科天水性科技有限公司
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