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DOPO derivative modified organosilicon damping additive and preparation method and application thereof

A kind of polymer, selected technology, applied in the field of silicone damping materials, can solve the problems of small molecular weight and easy precipitation

Active Publication Date: 2017-06-13
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently synthesized silicone damping agent with large steric hindrance has a small molecular weight and has the disadvantage of being easy to precipitate

Method used

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  • DOPO derivative modified organosilicon damping additive and preparation method and application thereof
  • DOPO derivative modified organosilicon damping additive and preparation method and application thereof
  • DOPO derivative modified organosilicon damping additive and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Example 1. Preparation of DOPO derivative modified polysiloxane damping agent and damping silicone rubber

[0066] 1. Preparation of DOPO derivative modified polysiloxane damping agent

[0067] (1) Preparation of α, ω-vinyl poly(dimethyl-methylvinyl)siloxane (formula II-A): 100g octamethylcyclotetrasiloxane, 8.5g tetramethyltetraethylene Cyclotetrasiloxane, 6.1g of tetramethyldivinyldisiloxane and 0.1g of tetramethylammonium hydroxide were added into a 250mL three-necked flask, and the temperature was raised to 90°C for an equilibrium reaction for 4h under a nitrogen atmosphere. After the reaction was completed, the temperature was increased to 150°C and maintained for 1 hour to decompose and destroy the catalyst. Finally, the temperature was lowered to 120°C, and low-molecular substances were removed in vacuum until there was no distillate. Lower the temperature, stop the decompression, and discharge after cooling to obtain α,ω-vinyl poly(dimethyl-methylvinyl)siloxan...

Embodiment 2

[0079] Example 2, preparation of DOPO derivative modified polysiloxane damping agent and damping silicone rubber

[0080] 1. Preparation of DOPO derivative modified polysiloxane damping agent

[0081] (1) Preparation of α, ω-vinyl poly(dimethyl-diphenyl-methylvinyl)siloxane (formula II-B): 100g octamethylcyclotetrasiloxane, 26.2g octamethylcyclotetrasiloxane, Phenylcyclotetrasiloxane, 23.2g tetramethyltetravinylcyclotetrasiloxane, 12.6g tetramethyldivinyldisiloxane and 0.1g tetramethylammonium hydroxide were added to a 250mL three-necked flask, Under a nitrogen atmosphere, the temperature was raised to 90° C. for an equilibrium reaction for 4 h. After the reaction was completed, the temperature was increased to 150°C and maintained for 1 hour to decompose and destroy the catalyst. Finally, the temperature was lowered to 120°C, and low-molecular substances were removed in vacuum until there was no distillate. Lower the temperature, stop the depressurization, and discharge af...

Embodiment 3

[0092] Example 3, preparation of DOPO derivative modified polysiloxane damping agent and damping silicone rubber

[0093] 1. Preparation of DOPO derivative modified polysiloxane damping agent

[0094] (1) Preparation of α, ω-vinyl poly(dimethyl-methylphenyl-methylvinyl)siloxane (formula II-C): 100g octamethylcyclotetrasiloxane, 18.1g Methylphenyl cyclosiloxane, 28.9 tetramethyltetravinyl cyclotetrasiloxane, 12.6 g tetramethyl divinyl disiloxane and 0.1 g tetramethylammonium hydroxide were added to a 250 mL three-necked flask, Under a nitrogen atmosphere, the temperature was raised to 90° C. for an equilibrium reaction for 4 h. After the reaction was completed, the temperature was increased to 150°C and maintained for 1 hour to decompose and destroy the catalyst. Finally, the temperature was lowered to 120°C, and low-molecular substances were removed in vacuum until there was no distillate. Lower the temperature, stop the depressurization, and discharge the material after co...

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Abstract

The invention discloses a DOPO derivative modified organosilicon damping additive and a preparation method and application thereof. The structural formula of the damping additive is as shown in the formula I. in the formula I, R1, R2, R3, R4, R5, R6, R7 and R8 are respectively selected from C2-C5 alkenyl group, aryl group, halogenated aryl group, amino-group, C1-C5 alkyl group, C1-C5 cyanogen alkyl group, C1-C5 halogenated alkyl group and C1-C5 aminoalkyl group; R5, R9 and R10 are respectively selected from C0-C5 alkylene group; R11, R12, R13, R14, R15, R16, R17 and R18 are respectively selected from hydrogen atom, aryl group, halogenated aryl group, nitro group, C1-C5 cyanogen alkyl group, C1-C5 halogenated alkyl group, hydroxyl group, halogen and C1-C5 alkyl group; m is any integer from 0-200; n is any integer from 0-200; q is any integer from 0-200; and m, n and q are not 0 at the same time. The damping additive of the invention will not migrate in silicone rubber base, has good compatibility with silicone rubber, is efficient, is easy to add, and will not influence mechanical properties of silicone rubber.

Description

technical field [0001] The invention belongs to the field of organic silicon damping materials, and in particular relates to a DOPO derivative modified organic silicon damping additive and its preparation method and application. Background technique [0002] Damping rubber material is a kind of functional material that uses the inherent viscoelastic properties of rubber itself to convert vibration mechanical energy into heat energy and dissipate it. It is an important new development field of aviation damping materials. Silicone rubber is the first choice for aerospace damping rubber materials due to its stable mechanical properties and small modulus change rate in high and low temperature environments; however, the loss factor (tanδ) of silicone rubber is generally relatively small, and the effective damping temperature range is narrow, making it difficult to It has a good damping effect, so it is necessary to modify the silicone rubber to improve its damping performance. ...

Claims

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Application Information

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IPC IPC(8): C08G77/395C08L83/07C08L83/04C08L83/08
CPCC08G77/395C08L83/04C08L83/08C08L2205/02C08L2205/025
Inventor 张志杰刘伯峥高希银赵云峰戴丽娜谢择民
Owner INST OF CHEM CHINESE ACAD OF SCI
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