A kind of flame retardant composition and a kind of flame retardant natural rubber
A natural rubber and composition technology, applied in the field of flame retardant, can solve the problems of flame retardant composition that have not been reported yet, reduce flame retardant effect, affect the charring of flame retardant composition, etc.
Active Publication Date: 2019-04-05
METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI +2
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Problems solved by technology
If the above-mentioned halogen-free flame retardant composition is used in natural rubber containing fillers, the fillers will affect the char formation of the flame retardant composition, reduce its flame retardant effect, and cause the heat release rate and smoke density of the flame retardant natural compound exceed the standard
[0014] So far, no flame retardant composition for natural rubber meeting the EN 45545 standard has been reported
Method used
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Embodiment 1-7
[0067] Example 1-7 Flame Retardant Natural Rubber Composition
[0068] The raw material ratio and performance measurement results of the flame-retardant natural rubber composition described in each embodiment are shown in Table 1; wherein 1 kg=1 part by weight.
[0069] The performance measurement results in Table 1 show that the natural rubber composition added with the flame retardant composition of the specific proportion provided by the present invention has good flame retardancy, and various flame retardancy indicators such as smoke density, toxicity index, heat release rate, etc. Lower than the requirements of R9 in EN45545:2013; and the flame-retardant natural rubber composition of each embodiment has high strength, high elongation, good aging resistance, small compression set, and fully meets the mechanical performance requirements of rubber shock absorbers . Therefore, the flame retardant composition of the present invention can significantly improve the flame ret...
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Abstract
The invention provides a flame-retardant composition for natural rubber. The flame-retardant composition for the natural rubber is prepared from 35-45 parts by weight of a triazine charring agent CFA, 28-42 parts by weight of low-melting-point glass powder, 20-26 parts by weight of boric-acid tripolycyanamide and 1-3 parts by weight of red phosphorus. The invention also provides a flame-retardant natural rubber composition containing the flame-retardant composition and a preparing method thereof. The flame-retardant natural rubber composition has the advantages of being low in heat release rate, smoke and smoke toxicity and good in mechanical performance, and the performance requirements of a rubber shock absorber of a rail transit vehicle are met.
Description
technical field [0001] The invention belongs to the technical field of flame retardancy, and in particular relates to a flame retardant composition suitable for natural rubber and natural rubber containing the flame retardant composition. Background technique [0002] In recent years, with the rapid development of high-speed railways and urban rail transit, the number of rail transit vehicles has increased dramatically. Due to the closed space inside the vehicle and the relatively large and concentrated combustibles, once a fire breaks out, the fire smoke will spread rapidly and fill the entire compartment, seriously threatening the lives of people and driving safety, and easily leading to the tragedy of vehicle crashes. negative impact on society. Therefore, countries around the world continue to put forward higher prevention standards for potential fire safety hazards that may occur in rail transit vehicles. Regarding the evaluation standards for the flame retardancy of ...
Claims
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IPC IPC(8): C08L7/00C08L91/06C08K13/02C08K5/3492C08K3/40C08K5/55C08K3/02C08K3/04
CPCC08K2003/026C08L7/00C08L2201/02C08L91/06C08K13/02C08K5/3492C08K3/40C08K5/55C08K3/02C08K3/04
Inventor 贺春江王玮赵云行张国文胡仕凯
Owner METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI