High-temperature vulcanized silicone rubber sealing strip and preparation method thereof

A technology of high-temperature vulcanization and silicone rubber, which is applied in the field of building materials, can solve problems such as the gap between tensile strength and tear strength, tearing, poor tensile strength and tear strength, etc., and achieve excellent mechanical properties Effect

Inactive Publication Date: 2019-03-01
GUANGZHOU BAIYUN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the traditional EPDM sealing strip with bad smell, the silicone rubber sealing strip has no smell, and has great advantages in weather resistance, high and low temperature resistance, physiological inertness, environmental friendliness and rebound sealing performance. Great advantage, however, silicone rubber sealing strip has a certain gap with EPDM rubber in terms of tensile strength and tear strength
In addition, silicone rubber itself is flammable, and it can burn continuously when exposed to open flames, which limits its application to a certain extent
[0003] The national standard requires the tensile strength of sealing strips for curtain walls to be ≥10.3MPa. The current flame-retardant high-temperature vulcanized silicone rubber sealing strips have poor tensile strength and tear resistance, and are prone to tearing and breaking during the sealing strip wear and tear process. And in the course of use, the phenomenon of tearing and breaking after the incision

Method used

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  • High-temperature vulcanized silicone rubber sealing strip and preparation method thereof
  • High-temperature vulcanized silicone rubber sealing strip and preparation method thereof
  • High-temperature vulcanized silicone rubber sealing strip and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1. Preparation of modified inorganic flame retardant:

[0045] Put 100g of aluminum hydroxide (with a particle size of 1-8μm) into a forced air constant temperature drying oven at 110°C for 4 hours, then put it into a flask, add 18g of tetramethyldivinyldisilazane into the flask, Stir rapidly at ℃ for 1 hour, and then put it into a blower constant temperature drying oven for 4 hours at 120 ℃ to prepare a modified inorganic flame retardant.

[0046] 2. Preparation of platinum-containing flame retardant catalyst:

[0047] Make a solution of chloroplatinic acid and octanol in a molar ratio of 1:2, and stir at 70°C and 3KPa for 5h. Then the precipitate was filtered out, and the filtrate was stirred at 70° C. and 0.2 KPa for 2 h to obtain a platinum compound.

[0048] The specific surface area is 80m 2 / g of fumed silica and the above-mentioned platinum compound are uniformly mixed in a weight ratio of 100:100, placed at room temperature for more than 10 hours, and dilute...

Embodiment 2

[0063] 1. Preparation of modified inorganic flame retardant:

[0064] Put 100g of aluminum hydroxide (with a particle size of 1-8μm) into a forced air constant temperature drying oven at 110°C for 4 hours, then put it into a flask, add 20g of tetramethyldivinyldisilazane into the flask, Stir rapidly at ℃ for 1 hour, and then put it into a blower constant temperature drying oven for 4 hours at 120 ℃ to prepare a modified inorganic flame retardant.

[0065] 2. Preparation of platinum-containing flame retardant catalyst:

[0066] Make a solution of chloroplatinic acid and octanol in a molar ratio of 1:2, and stir at 70°C and 3KPa for 5h. Then the precipitate was filtered out, and the filtrate was stirred at 70° C. and 0.2 KPa for 2 h to obtain a platinum compound.

[0067] The specific surface area is 80m 2 / g of fumed silica and the above-mentioned platinum compound are uniformly mixed in a weight ratio of 100:300, placed at room temperature for more than 10 hours, and dilute...

Embodiment 3

[0076] 1. Preparation of modified inorganic flame retardant:

[0077] Put 100g of aluminum hydroxide (with a particle size of 1-8μm) in a forced air constant temperature drying oven at 110°C for 4 hours, then put it into a flask, add 23g of tetramethyldivinyldisilazane to the flask, Stir rapidly at ℃ for 1 hour, and then put it into a blower constant temperature drying oven for 4 hours at 120 ℃ to prepare a modified inorganic flame retardant.

[0078] 2. Preparation of platinum-containing flame retardant catalyst:

[0079] Make a solution of chloroplatinic acid and octanol in a molar ratio of 1:2, and stir at 70°C and 3KPa for 5h. Then the precipitate was filtered out, and the filtrate was stirred at 70° C. and 0.2 KPa for 2 h to obtain a platinum compound.

[0080] The specific surface area is 80m 2 / g of fumed silica and the above-mentioned platinum compound are uniformly mixed in a weight ratio of 100:50, placed at room temperature for more than 10 hours, and diluted wit...

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Abstract

The invention relates to a high-temperature vulcanized silicone rubber sealing strip. The vulcanized silicone rubber sealing strip is mainly prepared from the following raw materials in parts by weight: 100 parts of methyl vinyl raw silicone rubber, 10-100 parts of a modified inorganic flame-retardant agent, 0.1-1 part of a platinum-containing flame-retardant catalyst, 20-80 parts of reinforcementfiller, 5-10 parts of a structure control agent, 0.2-1 part of a cross-linking agent, 0.01-0.1 part of an inhibitor and 0.5-3 parts of color masterbatch, wherein the modified inorganic flame-retardant agent is prepared from tetramethyldivinyldisilazane and aluminum hydroxide; the platinum-containing flame-retardant catalyst is prepared from chloroplatinic acid, octanol, fumed silica and vinyl-terminated polydimethylsiloxane. The high-temperature vulcanized silicone rubber is excellent in flame-retardant property and excellent in mechanical property.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a high-temperature vulcanized silicone rubber sealing strip and a preparation method thereof. Background technique [0002] Silicone rubber has excellent properties such as high and low temperature resistance, weather resistance, physiological inertia, low compression set, odorless and colorable, and is widely used in electronic appliances, automobiles, aerospace and other fields. In recent years, the use of high-temperature vulcanized silicone rubber sealing strips has grown rapidly. Compared with the traditional EPDM sealing strip with bad smell, the silicone rubber sealing strip has no smell, and has great advantages in weather resistance, high and low temperature resistance, physiological inertness, environmental friendliness and rebound sealing performance. The biggest advantage, however, is that silicone rubber sealing strips have a certain gap with EPDM rubber in terms o...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/04C08K13/06C08K9/06C08K3/22C08K9/12C08K3/24
CPCC08K2003/2227C08L83/04C08L2201/02C08L2205/025C08L2205/035C08K13/06C08K9/06C08K3/22C08K9/12C08K3/24
Inventor 饶友付子恩陈建军黄恒超
Owner GUANGZHOU BAIYUN CHEM IND
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