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Polysiloxane-polyurethane gel material and preparation method thereof

A technology of polyurethane and polysiloxane, applied in the field of organic polymer material preparation, can solve the problems of increased number of organosilicon segments, severe phase separation, reduced surface free energy, etc., and achieves good environmental friendliness, compression Small deformation and enhanced cushioning effect

Active Publication Date: 2013-02-27
QINGDAO ADVANCED MARINE MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low surface energy of polysiloxane makes its segments easy to migrate to the air-polymer interface, resulting in severe phase separation, which increases the number of silicone segments on the surface and reduces the surface free energy.

Method used

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  • Polysiloxane-polyurethane gel material and preparation method thereof
  • Polysiloxane-polyurethane gel material and preparation method thereof
  • Polysiloxane-polyurethane gel material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take 50 parts of polydimethylsiloxane with a molecular weight of 730, 116 parts of diphenylmethane diisocyanate, and stir at 80°C for 2 hours to prepare a semi-prepolymer A with an isocyanate content of 20%.

[0034] Get 40 parts of semi-prepolymer A, relative molecular mass is 550 parts of polyoxypropylene diols of 8000, relative molecular mass is 10 parts of polyoxypropylene tetraols of 1200, 0.8 part of dibutyltin dilaurate, bismuth isooctanoate 0.4, 1.0 parts of trimethylhydroxyethylethylenediamine, 2.2 parts of modified polysiloxane defoamer, and 3.1 parts of polyacrylate leveling agent. Stir to mix evenly, pour into shape.

[0035] The best performance was reached after 7 days, no exudation, VLRH hardness of 40, permanent compression set of 4.1%, and drop ball rebound of 22.

Embodiment 2

[0037]Take 40 parts of semi-prepolymer A prepared in Example 1, 310 parts of polyoxypropylene diols with a relative molecular mass of 6000, 20 parts of polytetrahydrofuran diols with a relative molecular mass of 2000, and polyoxypropylene diols with a relative molecular mass of 600 16 parts of triol, 1.0 parts of dibutyltin ditetradecanoate, 0.6 parts of triethylenediamine, 1.5 parts of silicone defoamer, 3 parts of molecular sieve desiccant, and 1.3 parts of polyacrylate leveling agent. Stir to mix evenly, pour into shape.

[0038] The best performance was reached after 7 days, no exudation, VLRH hardness of 33, permanent compression set of 5.1%, and drop ball rebound of 18.

Embodiment 3

[0040] Take 40 parts of polydiethylsiloxane with a molecular weight of 540, 40 parts of diphenylmethane diisocyanate, and 60 parts of toluene diisocyanate, and stir at 90°C for 2 hours to prepare a semi-prepolymer A with an isocyanate content of 25%.

[0041] Get 50 parts of semi-prepolymer A, 410 parts of polyoxypropylene diols of relative molecular mass 5000, 30 parts of polycaprolactone triols of relative molecular mass 1000, 8 parts of xylitol polyether pentaol of relative molecular mass 1000 , 1.4 parts of di(dodecylsulfide) dibutyltin, 1.0 parts of cyclohexylmethyl tertiary amine, 1.8 parts of modified polysiloxane defoamer, 2.2 parts of molecular sieve desiccant, and 1.6 parts of polyacrylate leveling agent. Stir to mix evenly, pour into shape.

[0042] The best performance was reached after 7 days, no exudation, VLRH hardness of 42, permanent compression set of 3.9%, and drop ball rebound of 28.

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Abstract

The invention relates to a polysiloxane-polyurethane gel material and a preparation method thereof. The material is the polysiloxane-polyurethane gel material capable of being used as a vibration and noise reduction buffering agent of an underwater acoustic device. The material has good environmental friendliness and good buffering capacity, has no migration or exudation of plasticizer when being used for a long time, and has small compressive deformation. The material has no plasticizer, and enhances buffering capacity by introducing short-chain polysiloxane. Besides, organic compound participates in the chemical reaction of the gel formation, to form a crosslinked macro-molecule gel. No migration or exudation of plasticizer when the material is used for a long time. The material has good environmental friendliness.

Description

technical field [0001] The invention belongs to the field of preparation of organic polymer materials, in particular to a polysiloxane-polyurethane gel material and a preparation method thereof. Background technique [0002] The polysiloxane-polyurethane gel material can be used as a vibration and noise reduction buffer for underwater acoustic devices. At present, light wax oil and plasticizer-containing polyurethane gel are mainly used as buffers. The polysiloxane-polyurethane gel material not only overcomes the shortcomings of light wax oil with low viscoelasticity and is easy to be damaged and lost, but also overcomes the fact that a large amount of plasticizer is added to the polyurethane gel containing plasticizer, and it can be used for a period of time. Finally, the migration and exudation of the plasticizer, the loss of gel properties, the large compression deformation, the reduction of the cushioning resilience, and the migration and exudation of the plasticizer are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/61C08G18/48C08G18/42C08G18/62C08G18/10C08L75/04C08L75/08C08L75/06
Inventor 冯岩华胡松霞刘连河张安智白晓军
Owner QINGDAO ADVANCED MARINE MATERIAL TECH
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