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A halogen-free flame retardant pp

A technology of flame retardant and inorganic phosphorus, which is applied in the field of halogen-free flame-retardant PP, can solve the problems affecting the mechanical properties and flame-retardant effect of PP products, poor compatibility of hollow glass microspheres, migration of hollow glass microspheres, etc. To achieve the effect of increasing the effective filling amount, reducing the content of waste, and reducing the burning of raw materials

Active Publication Date: 2019-10-11
慈溪市佳华塑化有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The disadvantage of the prior art is that the compatibility between the hollow glass microspheres and PP is not good. When the filling amount of the hollow glass microspheres in the PP increases to a certain extent, the hollow glass microspheres are easy to be removed during use. PP products migrate to the surface and fall off, thus affecting the mechanical properties and flame retardant effect of PP products

Method used

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  • A halogen-free flame retardant pp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: A halogen-free flame-retardant PP, comprising the following raw materials in parts by weight, halogen-free PP: 65 parts; antioxidant: 0.3 parts; aluminum hydroxide: 12 parts, hollow glass microspheres: 12 parts; Combustion agent: 10 parts, wherein the hollow glass microspheres include hollow glass microspheres 1 and hollow glass microspheres 2, and the mass ratio of the two is 2:10.

[0030] Its process steps are:

[0031] S1: Take the hollow glass microspheres of the formula amount, after degreasing, acid etching, and water washing, add 600g / L sodium hypophosphite methanol solution for activation treatment, and the stirring speed is 800-1200rpm;

[0032]S2: Weigh the formula amount of halogen-free PP masterbatch, add the formula amount of aluminum hydroxide, organic phosphorus flame retardant and antioxidant, melt and mix in the open mill, add the hollow glass microspheres activated according to step S1 beads, evenly dispersed;

[0033] S3: Put the mixed r...

Embodiment 2

[0035] Example 2: A halogen-free flame-retardant PP, the difference from Example 1 is that the mass ratio of the first hollow glass microsphere and the second hollow glass microsphere is 1:10.

Embodiment 3

[0036] Example 3: A halogen-free flame-retardant PP, the difference from Example 1 is that the mass ratio of the first hollow glass microsphere and the second hollow glass microsphere is 3:10.

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Abstract

The invention discloses halogen-free flame retardant polypropylene. The polypropylene comprises the following raw materials in parts by weight: 65 to 70 parts of halogen-free polypropylene, 30 to 35 parts of flame retardant and 0.3 part of antioxidant. The flame retardant consists of 10 to 12 parts of aluminium hydroxide, 12 to 13 parts of hollow glass beads and 8 to 10 parts of organophosphorus flame retardant. The hollow glass beads are activated by an inorganic phosphorus solution before use. The effective filling amount of the hollow glass beads in the polypropylene is increased by carrying out the activating treatment on the hollow glass beads; and the flame retardant effect of the polypropylene product is further enhanced.

Description

technical field [0001] The invention relates to the field of flame-retardant materials for home appliances, in particular to a halogen-free flame-retardant PP. Background technique [0002] Polypropylene (PP) is one of the four general-purpose plastic materials. It has excellent comprehensive properties, good chemical stability, good molding performance and relatively low price. It is widely used in chemical industry, construction, home appliances, packaging, automotive and other fields. In the field of home appliances, PP is commonly used in home appliance casings, cable casings, etc. During the use of home appliances, it is easy to generate a lot of heat, while PP has a low limiting oxygen index (LOI), is flammable, generates a large amount of heat when burned, burns quickly, and is easy to burn. Melt droplets are generated, so there is a safety hazard in using PP as a home appliance shell. Therefore, it is particularly important to study the flame retardancy of PP. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08K13/04C08K9/02C08K7/28C08K3/22C08K5/521
Inventor 宋建平
Owner 慈溪市佳华塑化有限公司