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Polyurethane material of glass flake as well as preparation method and application thereof

A technology of polyurethane materials and glass flakes, which is applied in chemical instruments and methods, other chemical processes, etc., can solve the problems that cannot meet the application requirements of underwater acoustic materials, achieve good room temperature curing characteristics, realize on-site pouring construction, and excellent underwater acoustic absorption The effect of sound performance

Inactive Publication Date: 2015-03-04
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN101418185A reports a method for preparing a polyurethane sound-absorbing coating, and patent CN2869014Y reports a polyurethane foam sound-absorbing material, but the above-mentioned patents are all aimed at air sound and cannot meet the application requirements of underwater acoustic materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The concrete steps of glass flake polyurethane material preparation method proposed by the present invention are as follows:

[0020] (1) Weigh 200g of polyether polyol PPG-2000 and put it into a vacuum drying oven at 90°C for 2 hours to vacuum dry.

[0021] (2) Add the dried polyether polyol into a 500mL three-necked flask, and add 31.8g of TDI to the constant pressure dropping funnel.

[0022] (3) Gradually drop the TDI in the constant pressure dropping funnel into the three-necked flask, and the addition time is controlled within 5 minutes. Start the stirrer and pass nitrogen protection. The prepolymer can be synthesized by reacting at 80°C for 3 hours.

[0023] (4) Weigh 150g of prepolymer, add 45g of 20-mesh glass flakes, stir evenly, then vacuumize at 85°C for 15 minutes, pour the material into a dry brown container, and store it in the dark under nitrogen. The thickness specification of the glass flakes is 4.5um, and the average particle size is 80 mesh.

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Embodiment 2

[0030] The concrete steps of glass flake polyurethane material preparation method proposed by the present invention are as follows:

[0031] (1) Weigh 200g of polyether polyol PPG-2000 and put it into a vacuum drying oven at 90°C for 3 hours to vacuum dry.

[0032] (2) Add the dried polyether polyol into a 500mL three-necked flask, and add 37.02g of TDI into the constant pressure dropping funnel.

[0033] (3) Drop the TDI in the constant-pressure dropping funnel into the three-necked flask, and control the addition time within 5 minutes. Start the stirrer and pass nitrogen protection. The prepolymer can be synthesized by reacting at 80°C for 3 hours.

[0034] (4) Weigh 150g of prepolymer, add 22.5g of 100-mesh glass flakes with an average thickness of 5.5um, stir evenly, then vacuumize at 85°C for 15min, pour the material into a dry brown container, and blow nitrogen Keep away from light.

[0035] (5) Add 13.5g of measured DMTDA curing agent to the treated prepolymer, and ...

Embodiment 3

[0041] The concrete steps of glass flake polyurethane material preparation method proposed by the present invention are as follows:

[0042] (1) Weigh 200g of polyether polyol PPG-2000 and put it into a vacuum drying oven at 90°C for 3 hours to vacuum dry.

[0043] (2) Add the dried polyether polyol into a 500mL three-necked flask, and add 42.5g of TDI to the constant pressure dropping funnel.

[0044] (3) Drop the TDI in the constant-pressure dropping funnel into the three-necked flask, and control the addition time within 5 minutes. Start the stirrer and pass nitrogen protection. The prepolymer can be synthesized by reacting at 80°C for 3 hours.

[0045] (4) Weigh 150g of prepolymer, add 37.5g of 200-mesh glass flakes with an average thickness of 5um, stir evenly, then vacuumize and defoam at 85°C for 15min, pour the material into a dry brown container, and pass nitrogen to avoid light save.

[0046] (5) Add 16.8g of measured DMTDA curing agent to the treated prepolymer,...

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Abstract

The invention discloses a polyurethane material of a glass flake as well as a preparation method and an application thereof. The preparation method comprises the steps of: preparing a prepolymer of PPG-200 polyether polyhydric alcohol and toluene diisocynate according to a molar ratio of (1:1.8)-(1:2.4); adding the glass flake which is 15-30%wt of the prepolymer; using a bimethylmercapto toluenediamine hardener which is 7-11.2wt% of the prepolymer; and agitating uniformly and carrying out pouring reaction to prepare the cured formed material. The material provided by the invention has an excellent water sound absorbing performance at 2-20kHz frequency range. The curing system is in a liquid state at normal temperature, and free from the heating process. The polyurethane material can be directly mixed and poured and has a good room temperature curing characteristic, so that field pouring construction of large members and complex curved surfaces can be realized.

Description

technical field [0001] The invention relates to a technology in the field of functional materials, in particular to a glass flake polyurethane material and its preparation method and application. Background technique [0002] Underwater sound-absorbing materials are materials that can absorb or dissipate sound energy in underwater acoustic engineering. Sound waves can be absorbed by the material without reflection and have a large attenuation, so that most of the incident sound energy is absorbed. There are many types of underwater sound-absorbing materials. Polyurethane underwater sound-absorbing materials are new polymer-based underwater sound-absorbing materials developed in recent years. [0003] The special soft and hard segment structure of polyurethane material makes it possible to synthesize polymers with different physical and acoustic properties by changing the molecular structure of polyurethane hard segment and soft segment and their relative proportions, so as t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/08C08K3/40C08G18/66C08G18/48C08G18/32C08G18/10C09K3/00
Inventor 马玉亮梁磊王兵
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP