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Preparation method of rubber diaphragm used for temperature sensing element of temperature control valve

A temperature-sensing element and rubber diaphragm technology, which is applied in the field of sealing rubber, can solve the problems of changing sealing state, poor effect, sealing and elastic shrinkage that cannot meet the demand, etc., and achieve small compression deformation, low cost, and excellent comprehensive performance. Effect

Inactive Publication Date: 2018-10-26
谭八一
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the rubber diaphragm deforms too much, the sealing state will change, and the effect will deteriorate, and the sealing and elastic shrinkage cannot meet the demand

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing a rubber diaphragm for a temperature-sensing element of a temperature control valve, comprising the following steps:

[0022] S1. Mix 12kg urea and 60kg water evenly, add 2kg sodium hydroxide and stir evenly, raise the temperature to 88°C, add dropwise to 70kg aqueous solution of magnesium chloride with a concentration of 2.2mol / L and continue stirring for 60min, add 8kg sodium oleate and 30kg talcum powder , 2kg of titanate continued to stir for 25min at a stirring temperature of 94°C, suction filtered, washed, dried at 65°C, and ground to obtain a preform;

[0023] S2. Plasticize 90kg of polyurethane rubber, 10kg of chloroether rubber, and 12kg of methylphenyl silicone rubber for 4 minutes, then add 20kg of coconut fiber, 4kg of calcium sulfate whiskers, 18kg of prefabricated materials, 12kg of medical stone powder, 4kg of active agent, and 1kg of anti-aging Kneading agent for 20min, put it into the open mixer, add 2kg tetramethylthiuram monosul...

Embodiment 2

[0026] A method for preparing a rubber diaphragm for a temperature-sensing element of a temperature control valve, comprising the following steps:

[0027] S1. Mix 18kg urea and 40kg water evenly, add 4kg sodium hydroxide and stir evenly, heat up to 80°C, add dropwise to 90kg aqueous solution of magnesium chloride with a concentration of 1.8mol / L and continue stirring for 100min, add 6kg sodium oleate and 50kg talcum powder 1kg of titanate was stirred continuously for 35min at a stirring temperature of 88°C, suction filtered, washed, dried at 75°C, and ground to obtain a preform;

[0028] S2. Plasticize 70kg of polyurethane rubber, 20kg of chloroether rubber, and 6kg of methylphenyl silicone rubber for 8 minutes, then add 10kg of coconut fiber, 8kg of calcium sulfate whiskers, 12kg of prefabricated materials, 16kg of medical stone powder, 2kg of active agent, and 3kg of anti-aging Knead with the agent for 10 minutes, put it into the open mixer, add 4kg tetramethylthiuram monos...

Embodiment 3

[0031] A method for preparing a rubber diaphragm for a temperature-sensing element of a temperature control valve, comprising the following steps:

[0032] S1. Mix 14kg urea and 55kg water evenly, add 2.5kg sodium hydroxide and stir evenly, raise the temperature to 86°C, add dropwise to 75kg aqueous magnesium chloride solution with a concentration of 2.1mol / L and continue stirring for 70min, add 7.5kg sodium oleate, 35kg Talc powder and 1.8kg titanate were stirred continuously for 28 minutes at a stirring temperature of 92°C, suction filtered, washed, dried at 68°C, and ground to obtain a preform;

[0033] S2. Plasticize 85kg polyurethane rubber, 13kg chloroether rubber, and 10kg methylphenyl silicone rubber for 5 minutes, then add 18kg coconut fiber, 5kg calcium sulfate whiskers, 16kg prefabricated material, 13kg medical stone powder, 3.5kg active agent, 1.5 Knead anti-aging agent for 18 minutes, put it into the open mixer, add 2.5kg tetramethylthiuram monosulfide, 1.7kg tert...

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PUM

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Abstract

The invention discloses a preparation method of a rubber diaphragm used for a temperature sensing element of a temperature control valve. The method includes the following steps that urea and water are mixed evenly, sodium hydroxide is added into the mixture, the mixture is stirred evenly and heated, the mixture is dropwise added into a magnesium chloride aqueous solution, stirring continues, sodium oleate, talcum powder and titanate are added, stirring continues, and after suction filtration, washing, drying and grinding, a prefabricated material is obtained; polyurethane rubber, epichlorohydrin rubber and methyl phenyl silicone rubber are plasticated, then coconut fibers, calcium sulfate whiskers, the prefabricated material, medical stone powder, an active agent and an antioxidant are added, kneaded and put into an open mill, tetramethylthiolam monosulfide, tert-butyl hydrogen peroxide, 4,4'-dithiomorpholine and toner are added and mixed, thin-passing is conducted, sheet forming is conducted, and a vacuum plate vulcanizing machine is used for first vulcanization and then secondary vulcanization to obtain the rubber diaphragm used for the temperature sensing element of the temperature control valve. The obtained rubber diaphragm has small compression deformation at high temperature and good sealing effects, no leakage occurs, the service life is long, the preparation method issimple and the cost is low.

Description

technical field [0001] The invention relates to the technical field of sealing rubber, in particular to a method for preparing a rubber diaphragm used for a temperature-sensing element of a temperature control valve. Background technique [0002] The self-operated temperature regulating valve realizes automatic regulation by utilizing the principles of thermal expansion of liquid and incompressibility of liquid. The liquid expansion in the temperature sensor is uniform, and its control function is proportional adjustment. When the temperature of the controlled medium changes, the volume of the temperature-sensing liquid in the sensor expands or contracts. When the temperature of the controlled medium is higher than the set value, the temperature-sensing liquid expands, pushing the valve core down to close the valve, reducing the flow of the heat medium; when the temperature of the controlled medium is lower than the set value, the temperature-sensing liquid contracts, and t...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08L71/03C08L83/04C08K13/06C08K9/02C08K9/04C08K7/08C08K3/34C08K5/09C08K3/22C08J5/18C08J3/24
CPCC08J5/18C08J3/246C08K3/34C08K5/09C08K7/08C08K9/02C08K9/04C08K13/06C08K2003/2296C08K2201/014C08L2205/035C08L2205/16
Inventor 谭八一
Owner 谭八一
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