Halogen-free and low-smoke flame retardant for preparing polyethylene material
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A low-smoke flame retardant, polyethylene technology, applied in the field of halogen-free low-smoke flame retardants, halogen-free smoke suppression flame retardants, can solve the problems of loss of property and life, non-flammability, fire-prone, etc.
Inactive Publication Date: 2016-03-23
NORTHWEST NORMAL UNIVERSITY +1
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Problems solved by technology
Due to the good performance of polyethylene, it is widely used in various industries. However, if the polyethylene used is not flame retardant in construction, w
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Embodiment 1
[0016] Get 100 parts of polyethylene, 12 parts of dimethyl methylphosphonate, sodium stearate modified Mg(OH) 2 8 parts, 0.3 parts of 2,3-dimethyl-2,3-diphenylbutane, 5 parts of palygorskite clay, 0.6 parts of tetraphenylporphyrin zinc, put into a high-speed mixer and stir for about 30 minutes, Add it into a twin-screw extruder for mixing and granulation to obtain a flame-retardant polyethylene material. The oxygen index of the flame-retardant polyethylene material is 38, the smoke density is 70 under flameless conditions, the tensile strength is 13.9MPa, and the elongation at break is 201%.
Embodiment 2
[0018] Get 100 parts of polyethylene, 10 parts of dimethyl methylphosphonate, sodium stearate modified Mg(OH) 2 5 parts, 0.1 part of 2,3-dimethyl-2,3-diphenylbutane, 2 parts of palygorskite clay, 0.3 part of zinc tetraphenylporphyrin, put into a high-speed mixer and stir for about 30 minutes, Add it into a twin-screw extruder for mixing and granulation to obtain a flame-retardant polyethylene material. The oxygen index of the flame-retardant polyethylene material is 32.5, the smoke density under flameless conditions is 74.9, the tensile strength is 12.4MPa, and the elongation at break is 204%.
Embodiment 3
[0020] Get 100 parts of polyethylene, 15 parts of dimethyl methylphosphonate, sodium stearate modified Mg(OH) 2 10 parts, 0.5 parts of 2,3-dimethyl-2,3-diphenylbutane, 8 parts of palygorskite clay, 1 part of tetraphenylporphyrin zinc, put into a high-speed mixer and stir for about 30 minutes, Add it into a twin-screw extruder for mixing and granulation to obtain a flame-retardant polyethylene material. The oxygen index of the flame-retardant polyethylene material is 36, the smoke density is 73 under flameless conditions, the tensile strength is 13.2MPa), and the elongation at break is 180%.
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Abstract
The invention discloses a halogen-free and low-smoke flame retardant for preparing a polyethylene material. The halogen-free and low-smoke flame retardant is prepared by compounding DMMP (Dimethyl Methyl Phosphonate), Mg(OH)2 (available in the market) modified by sodium stearate, 2,3-dimethyl-2,3-diphenylbutane, palygorskite clay and zinc tetraphenylporphyrin. In the polyethylene material prepared by utilizing the halogen-free and low-smoke flame retardant, the oxygen index is not lower than 32, the smoke density under a flameless condition is not higher than 75, the tensile strength is not lower than 12MPa, and the elongation at break is not lower than 180 percent, so that the polyethylene material is a modified halogen-free, low-smoke and anti-flaming polyethylene composite material with a very good performance and can be widely applied to the fields of electric wires and cables, buildings and the like. The flame resistance of the polyethylene material cannot be affected after the polyethylene material is subjected to conventional irradiation cross-linking if cross-linking treatment needs to be carried out on a prepared product, and the mechanical performance of the polyethylene material can be further increased.
Description
technical field [0001] The invention relates to a halogen-free smoke-suppressing flame retardant, in particular to a halogen-free low-smoke flame retardant for preparing polyethylene materials, and belongs to the technical field of composite materials. Background technique [0002] In the past 30 years, my country's national economy has achieved unprecedented rapid development under the guidance of the policy of reform and opening up, but the degree of fire hazards has been the most serious period since the founding of the People's Republic of China. Although in the mid-to-late 1990s, governments at all levels and all walks of life paid great attention to fire protection work and increased investment in fire protection, they did not stop the rising trend of fires, especially the serious fire accidents that occurred in the past one or two years. It not only warns that mass death and mass injury fires are showing a "rebound" trend, but also reflects the objective reality that ...
Claims
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Application Information
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