Anti-aging halogen-free flame retardant thermoplastic polyurethane elastomer

A technology of thermoplastic polyurethane and elastomer, which is applied in the field of aging-resistant halogen-free flame-retardant thermoplastic polyurethane elastomer and thermoplastic polyurethane elastomer, and can solve the problem of reducing the mechanical properties of materials such as tensile strength, elongation at break, and deterioration of material aging performance, etc. Problems, to achieve the effect of improving heat aging resistance, heat aging resistance, flame retardant and anti-dripping, and improving high temperature and high humidity resistance

Inactive Publication Date: 2016-04-06
NINGBO QINGHU ELASTOMER SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flame retardancy of thermoplastic polyurethanes in the prior art requires the addition of a large amount of halogen-free flame retardants, which often significantly reduces the mechanical properties of the material such as tensile strength, elongation at break, and especially the aging performance of the material while improving the flame retardancy also worse

Method used

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  • Anti-aging halogen-free flame retardant thermoplastic polyurethane elastomer
  • Anti-aging halogen-free flame retardant thermoplastic polyurethane elastomer
  • Anti-aging halogen-free flame retardant thermoplastic polyurethane elastomer

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Weigh the flame retardant, flame retardant synergist, reactive anti-aging chain extender, non-flame retardant additive, antioxidant according to the components and their weight percentages described in Table 1 Example 1, and mix for 5-10min (preferably 5-7min), into a well-mixed mixture;

[0036] Weigh the thermoplastic polyurethane according to the components and weight percentages described in Example 1 of Table 1, and dry at 80-110°C for 3-8h (preferably 90-100°C for 3-5h);

[0037]Mix the mixture with the dried thermoplastic polyurethane for 5-10 minutes until the material is uniform, then extrude, draw, and granulate in a screw extruder at 150-210°C (preferably 160-190°C), and the speed of the screw machine is 180- 600 rpm (preferably 180-400 rpm), to obtain the aging-resistant halogen-free flame-retardant thermoplastic polyurethane elastomer of the present invention.

Embodiment 2-6

[0039] The materials were weighed according to the components and weight percentages described in Examples 2-6 in Table 1, and the aging-resistant halogen-free flame-retardant thermoplastic polyurethane elastomer of the present invention was obtained through the process as described in Example 1.

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Abstract

The invention relates to an anti-aging halogen-free flame retardant thermoplastic polyurethane elastomer, belonging to the technical field of high molecular materials. The elastomer comprises the following components in percentage by weight: 60-80% of thermoplastic polyurethane, 1-10% of reaction type anti-aging chain extender, 10-30% of halogen-free flame retardant, 1-10% of flame retardant synergist, 0.1-2% of antioxidant and 0-5% of non-flame retardant additive, wherein the thermoplastic polyurethane refers to one or two of polyether type thermoplastic polyurethane and polyester type thermoplastic polyurethane; and the reaction type anti-aging chain extender refers to one type or more types of epoxy resin. In the invention, through reasonable arrangement of the elastomer components, the resistance to high temperature and high humidity, hydrolysis and aging as well as the flame retardant dripping resistance of the halogen-free flame retardant thermoplastic polyurethane elastomer are improved; and the anti-aging halogen-free flame retardant thermoplastic polyurethane elastomer does not contain halogen or heavy metals particularly like lead, mercury, cadmium and hexavalent chromium or poly-brominated diphenyl ethers or poly-brominated biphenyls.

Description

technical field [0001] The invention relates to a thermoplastic polyurethane elastomer, in particular to an aging-resistant halogen-free flame-retardant thermoplastic polyurethane elastomer, which belongs to the technical field of polymer materials. Background technique [0002] Thermoplastic polyurethane (TPU) has excellent elongation recovery, cold resistance, oil resistance, abrasion resistance, bending resistance, ozone aging resistance and other characteristics, and its wear resistance is second to none. It is widely used in industry, automobile industry, shoe industry, wire and cable and other industries. However, the flame retardancy of thermoplastic polyurethane is poor. Once burned, the flame will be very violent and accompanied by thick black smoke, and there will be serious droplet phenomenon at the same time, which has the risk of expanding the fire. In addition, thermoplastic polyurethane has poor hydrolysis resistance and aging resistance. The hydrolysis resi...

Claims

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Application Information

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IPC IPC(8): C08L75/06C08L75/08C08L63/00C08L63/04C08K13/06C08K13/02C08K5/3492C08K3/32C08K3/22
CPCC08L75/06C08L75/08C08L2201/02C08L2201/08C08L2201/22C08L2205/02C08L2205/03C08L2205/035C08L63/00C08L63/04C08K13/06C08K5/34924C08K3/32C08K2003/2296C08K5/34922C08K13/02C08K2003/321
Inventor 何晓东史伟才
Owner NINGBO QINGHU ELASTOMER SCI & TECH
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