A self-defoaming dehydrogenation type oil-resistant and high-temperature-resistant fluorosilicon sealant and its preparation method
A technology of high temperature resistance and sealant, applied in the direction of chemical instruments and methods, polymer adhesive additives, non-polymer adhesive additives, etc., can solve the limitations of process performance and temperature resistance, and cannot meet the requirements of aircraft use and Repair harsh working conditions and other problems to achieve good temperature and oil resistance, stable performance, and uniform texture
Active Publication Date: 2021-08-03
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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Problems solved by technology
Due to the use of addition type and deacidification type vulcanization system, its process performance and temperature resistance are limited by the use conditions, and cannot meet the harsh working conditions of aircraft use and maintenance
Method used
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Embodiment Construction
[0028] Below in conjunction with embodiment technical solution of the present invention will be described in further detail:
[0029] The components and amounts of the sealing agent in the implementation of the technical solution of the present invention are shown in Table 1. Each serial number in Table 1 represents an embodiment of a sealant, wherein serial numbers 1-3# are experimental examples (using acicular titanium dioxide as a filler), and 4-6# are comparative examples (using ordinary titanium dioxide as a filler). The performance test values of the embodiments are shown in Table 2. Taking the implementation of serial number 1# in Table 1 as an example, the steps of the preparation method of the sealant are as follows:
[0030] (1) Preparation of base paste: Weigh 100 parts of liquid fluorosilicone rubber (viscosity 20Pa.s), 60-100 parts of acicular titanium dioxide, 4 parts of ferric oxide, 10 parts of quartz powder, and 0.3 parts of dibutyltin dilaurate , use a th...
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Abstract
The invention belongs to the technical field of polymer materials and their production, and relates to a self-defoaming and dehydrogenation oil-resistant and high-temperature-resistant fluorosilicon sealant and a preparation method thereof. It is made by mixing base paste and vulcanizing agent. The proportion of base paste and vulcanizing agent is: base paste 99%, vulcanizing agent 1%. The liquid fluorosilicone rubber of the base paste is sealed with hydroxyl The polytrifluoropropylmethylsiloxane at the end has a viscosity between 20Pa.s-82Pa.s; the titanium dioxide filler is needle-shaped, with a length-to-diameter ratio of 10:1 to 25:1, and adopts self-dispelling Foam formulation technology makes the sealant vulcanized with uniform texture and stable performance. Liquid polytrifluoropropylmethylsiloxane is used as liquid raw rubber to prepare dehydrogenated sealant, which has good temperature and oil resistance.
Description
technical field [0001] The invention belongs to the technical field of polymer materials and their production, and relates to a self-defoaming and dehydrogenation oil-resistant and high-temperature-resistant fluorosilicon sealant and a preparation method thereof. The sealant has good self-defoaming performance, can discharge hydrogen generated during the vulcanization process at room temperature, and can be used for sealing aircraft fuel tanks and electrical potting. Background technique [0002] With the development of the aviation industry, especially the continuous advancement of the fifth-generation fighter jet and UAV technology, the performance requirements for aviation fluorosilicon sealants are also getting higher and higher, especially for the high temperature resistance and oil resistance of fluorosilicon sealants Performance assessment. Judging from the current research results and products at home and abroad, the dehydrogenated fluorosilicone sealant has the bes...
Claims
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IPC IPC(8): C09J183/08C09J11/04C09J11/08C09K3/10
CPCC08K2003/2272C08K2201/016C08L2201/08C09J11/04C09J11/08C09J183/08C09K3/10C09K2003/1078C08L83/04C08K7/08C08K3/36C08K3/22
Inventor 高元峰吴松华秦蓬波章谏正鲍传磊
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS