Flame-retardant high-temperature vulcanized silicone rubber strips for doors and windows of buildings and preparation method thereof

A technology of high temperature vulcanization, building doors and windows, applied in the direction of sealing devices, etc., can solve the problems of personnel hazards and secondary pollution of the environment, and achieve the effects of good fire resistance, high flame retardant efficiency, and improved quality.

Active Publication Date: 2010-07-28
浙江凌志新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, silicone sealants obtain flame retardant effects by adding halogen flame retardants or inorganic flame retardants. Although halogen flame retardants have high flame retardant efficiency, their flame retardant mechanism is to generate non-combustible hydrogen halide gas during combustion. It will cause secondary pollution to the environment, and at the same time cause harm to personnel, and has been gradually banned from use

Method used

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  • Flame-retardant high-temperature vulcanized silicone rubber strips for doors and windows of buildings and preparation method thereof
  • Flame-retardant high-temperature vulcanized silicone rubber strips for doors and windows of buildings and preparation method thereof
  • Flame-retardant high-temperature vulcanized silicone rubber strips for doors and windows of buildings and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In the kneader, add 100 parts by weight of methyl vinyl silicone rubber with a vinyl content of 0.16mol% and a molecular weight of 500,000, and then add 6 parts by weight of hydroxyl silicone oil with a viscosity of 4000mPa.s, white carbon black of 50 parts by weight and 150 parts by weight of activated aluminum hydroxide were kneaded for 4 hours at a temperature of 100°C and a vacuum of -0.10 MPa to obtain a mixed rubber. Cool the above-mentioned rubber compound to room temperature, add 0.5 part of color masterbatch and 1 part of vulcanizing agent 2,4-dichlorobenzoyl peroxide to 100 parts by weight of the mixed rubber, and pass it 5 times on the open mill to prepare Get mixed rubber film. Cut the film into 4 cm, feed it into the extruder, extrude the strip, and vulcanize the extruded strip in a high-temperature vulcanization oven at 200°C; put the vulcanized strip into an oven at 180°C for curing After secondary vulcanization, flame-retardant high-temperature vulcaniz...

Embodiment 2

[0039] Add 100 parts by weight of methyl vinyl silicone rubber with a vinyl content of 0.23mol% and a molecular weight of 700,000, 150 parts by weight of white carbon black, 70 parts by weight of aluminum hydroxide, and 10 parts by weight of hydroxyl silicone oil with a viscosity of 300mPa.s Kneading machine, kneading at 180°C, vacuum degree -0.06MPa for 2 hours, cooled to room temperature, to obtain mixed rubber. The above-mentioned mixed rubber is cooled to room temperature, 1.5 parts of color masterbatch and 3 parts of vulcanizing agent benzoyl peroxide are added to 100 parts by weight of the mixed rubber, and the mixed rubber film is obtained after passing through the mill for 3 times. Cut the film into 6 cm, feed it into the extruder, extrude the strip, and vulcanize the extruded strip in a high-temperature vulcanization oven at 270°C; put the vulcanized strip into an oven at 220°C for curing Secondary vulcanization to prepare flame-retardant high-temperature vulcanized s...

Embodiment 3

[0043] Add 100 parts by weight of methyl vinyl silicone rubber with a vinyl content of 0.18mol% and a molecular weight of 600,000 in the kneader, then add 8 parts by weight of hydroxyl silicone oil with a viscosity of 1000mPa.s, and 100 parts by weight of white carbon black and 100 parts by weight of active magnesium hydroxide were kneaded for 0.5 hour at a temperature of 120°C and a vacuum of -0.08MPa to obtain a rubber compound. The above-mentioned mixed rubber is cooled to room temperature, 1 part of color masterbatch and 2 parts of vulcanizing agent dicumyl peroxide are added to 100 parts by weight of the mixed rubber, and the mixed rubber film is obtained after thinly passing 4 times on the open mill . Cut the film into 5 cm, feed it into the extruder, extrude the strip, and vulcanize the extruded strip in a high-temperature vulcanization oven at 230°C; put the vulcanized strip into an oven at 200°C for curing Secondary vulcanization to prepare flame-retardant high-tempe...

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Abstract

The invention discloses flame-retardant high-temperature vulcanized silicone rubber strips for doors and windows of buildings and a preparation method thereof. The method comprises the following steps: adding methyl vinyl silicone rubber, an inorganic flame retardant, fillers and a structural control agent into a kneading machine, dehydrating the mixture at the temperature of between 100 and 180 DEG C and the vacuum degree of between -0.06 and -0.10 MPa for 0.5 to 4 hours, and then cooling the mixture to produce compound rubber; thinning and milling masterbatch rubber, a vulcanizing agent and the compound rubber for 3 to 5 times at room temperature on a mill; cutting thinned compound rubber sheet into rubber strips with the width of between 4 and 6 centimeters and feeding the rubber strips to a screw extruder to extrude the rubber strips; and vulcanizing and forming the rubber strips through a high-temperature drying channel and finally performing a secondary vulcanization in a drying box to produce the flame-retardant high-temperature vulcanized silicone rubber strips for the doors and the windows of the buildings. The flame-retardant high-temperature vulcanized silicone rubber strips for the doors and the windows of the buildings overcome the defects of low hardness and difficult installation of common silicone rubber strips, have high flame-retardant performance and wide range of use temperature, and can be used under bad weather conditions.

Description

technical field [0001] The invention relates to building sealing strips, in particular to a flame-retardant high-temperature vulcanized silicone rubber strip for building doors and windows and a preparation method thereof. Background technique [0002] Silicone rubber is the category with the largest output and the most varieties and grades among silicone products. According to the vulcanization method and vulcanization temperature, silicone rubber is divided into two categories: high temperature vulcanization (HTV) silicone rubber and room temperature vulcanization (RTV) silicone rubber. High temperature vulcanized silicone rubber is polyorganosiloxane (ie raw rubber) with high molecular weight (generally 500,000 to 700,000 molecular weight), adding reinforcing fillers and other additives, using organic peroxides as vulcanizing agents, and forming under pressure (molded, extruded, calendered) or injection molded and cross-linked at high temperature into a rubber-like produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E06B7/23C08L83/07C08K13/02C08K3/22C08K3/26C08K3/38
Inventor 陈世龙蔡守信程燕芬王香娣高传花徐清清
Owner 浙江凌志新材料有限公司
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