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Silicification-free sealing gasket for aerosol system valve

A technology of silicification treatment and sealing gaskets, which is applied in shaft seals, valve details, valve devices, etc., and can solve problems such as personal safety hazards

Pending Publication Date: 2020-05-19
烟台鑫汇包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The siliconization treatment of EPDM sealing gaskets generally uses low molecular weight dimethyl silicone oil, which may enter the human body together with the propellant or liquid medicine during the service life of the aerosol valve system, thereby endangering personal safety. cause hidden danger

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Provide a siliconization-free aerosol system valve sealing gasket, which is made of the following raw materials in parts by weight: EPDM rubber: 100 parts; reinforcing agent white carbon black: 38 parts; filler calcium carbonate : 20 parts; plasticizer polyisobutylene: 10 parts; coupling agent adopts silane coupling agent: 1 part; crosslinking accelerator: 2 parts; crosslinking agent: 8 parts; modified high molecular weight silicone wax GW-6501S: 3 copies.

Embodiment 2

[0063] Provide a siliconization-free aerosol system valve sealing gasket, which is made of the following raw materials in parts by weight: EPDM rubber: 100 parts; reinforcing agent white carbon black: 45 parts; filler calcined kaolin : 20 parts; plasticizer dimethyl silicone oil: 10 parts; coupling agent adopts silane coupling agent: 1 part; crosslinking accelerator: 2 parts; crosslinking agent: 8 parts; modified high molecular weight organosilicon wax GW- 6501S: 4 parts.

Embodiment 3

[0065] Provide a siliconization-free aerosol system valve sealing gasket, which is made of the following raw materials in parts by weight: EPDM rubber: 100 parts; reinforcing agent white carbon black: 60 parts; filler calcium carbonate : 20 parts; plasticizer: 36 parts, including 18 parts of dimethyl silicone oil and 18 parts of polyisobutylene; coupling agent adopts silane coupling agent: 1 part; crosslinking accelerator: 2 parts; crosslinking agent: 8 parts ; Modified high molecular weight silicone wax GW-6501S: 6 parts.

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PUM

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Abstract

The invention discloses a silicification-free sealing gasket for an aerosol system valve. A preparation method comprises steps: modified high-molecular-weight organic silicon wax GW-6501S is compatible with ethylene propylene diene monomer, a reinforcing agent, a filling agent, a plasticizer, a coupling agent, a cross-linking accelerant and a cross-linking agent; wherein the addition amount is preferably 3-6 parts by weight, when the addition amount is less than 3 parts by weight, the self-lubricating effect is not obvious, but when the addition amount is more than 6 parts by weight, the material physical properties can be reduced to a certain extent. According to the invention, the self-lubricating property of the ethylene propylene diene monomer sealing gasket material can be improved; automatic loading in the production process is facilitated; the frictional resistance is reduced when a valve rod of the valve works, dragging or suspension problems of the rubber sealing gasket in valve rod working process are solved; the surface silicification treatment process of the ethylene propylene diene monomer sealing gasket is omitted, potential personal safety hazards caused by the factthat low-molecular-weight organic molecules enter a human body along with propellants or liquid medicine are avoided, and the safety of the sealing gasket for the aerosol system valve is improved.

Description

technical field [0001] The invention relates to a siliconization-free aerosol system valve sealing gasket, which belongs to the technical field of sealing materials. Background technique [0002] Aerosol means that the drug-containing solution, emulsion or suspension is packaged together with a suitable propellant in a pressure-resistant container with a special valve system, and the contents are sprayed out in the form of mist by the pressure of the propellant during use. , a preparation for lung inhalation or direct spraying to the mucous membrane of the cavity, skin and space for disinfection. Aerosol consists of medicine, propellant, pressure-resistant container and valve system. [0003] In recent years, pharmaceutical companies have been enthusiastic about the development of inhalation preparation products. Among them, the incidence of respiratory diseases such as asthma, chronic obstructive pulmonary disease (COPD) and bronchiectasis has shown a continuous high growt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L83/04C08L23/20C08K13/04C08K7/26C08K3/26C08K3/34F16K41/04
CPCC08L23/16F16K41/04C08L2205/03C08K2003/265C08L2205/025C08L2205/035C08L83/04C08K13/04C08K7/26C08K3/346C08L23/22C08K3/26
Inventor 史晓东李庆博常志青
Owner 烟台鑫汇包装有限公司
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