High-melt-index halogen-free flame-retardant polypropylene material and preparation method thereof

A flame-retardant polypropylene and high-melt finger technology, applied in the field of flame-retardant materials, can solve problems such as lower interfacial tension, low flame-retardant efficiency, and high pollution

Active Publication Date: 2020-02-21
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a high-melting index halogen-free flame-retardant polypropylene material with a better flame-retardant effect and a preparation method thereof in order to overcome the above-mentioned defects in the prior art. According to a reasonable P/N ratio, the gas source and acid source are supplemented to achieve the best synergistic effect. At the same time, the surface of the flame retardant is

Method used

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  • High-melt-index halogen-free flame-retardant polypropylene material and preparation method thereof
  • High-melt-index halogen-free flame-retardant polypropylene material and preparation method thereof
  • High-melt-index halogen-free flame-retardant polypropylene material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] The preparation of pyro(poly)piperazine phosphate:

[0075] (1) In a three-necked flask with a stirring paddle, feed nitrogen for 0.5-1 hour, evacuate the internal air, then weigh phosphoric acid (97.97g) and piperazine phosphate (184.1g) (the molar ratio is: n phosphoric acid: n phosphoric acid Piperazine=1:1), added to the three-necked flask, heated to 80-100°C in a water bath, continuously fed with nitrogen protection, started stirring, the stirring rate was 40-60rpm, and the reaction time was 2-3 hours. After the reaction was complete, cool to room temperature, filter and dry, and pulverize to obtain the white intermediate product piperazine diphosphate.

[0076] (2) Weigh 264g of piperazine diphosphate and 97.97g of phosphoric acid (the molar ratio is: n piperazine diphosphate: n phosphoric acid = 1:1), add them into a three-necked flask, heat the oil bath to 180-220°C, and continue to pass Enter nitrogen protection, start stirring, continue to stir for 2-3 hours,...

Embodiment 2

[0085] See Example 1 for the preparation of piperazine pyro(poly)phosphate and the preparation of surface-modified ammonium polyphosphate.

[0086] Preparation of high melting point halogen-free flame retardant polypropylene material:

[0087] 1) Weigh raw materials by weight, pre-mix 70 parts of dry copolymerized polypropylene (K8003) and 0.5 part of white oil in a double-motion mixer for 5 minutes, the speed of the double-motion mixer body is 20rpm, and the speed of the internal blades is 30rpm, the tilt angle of the body is 0° to achieve uniform mixing.

[0088] 2) Add in parts by weight, 15 parts of piperazine pyrophosphate, 15 parts of surface modified ammonium polyphosphate (APP-60), 0.5 part of coupling agent, 0.2 part of compatibilizer, 0.2 part of antioxidant, 0.2 part of light Stabilizer, double-motion mixer body speed is 30rpm, internal blade speed is 40rpm, body tilt angle is 0°, continue mixing for 5 minutes to obtain a homogeneous mixture.

[0089] 3) See Examp...

Embodiment 3

[0092] See Example 1 for the preparation of piperazine pyro(poly)phosphate and the preparation of surface-modified ammonium polyphosphate.

[0093] Preparation of high melting point halogen-free flame retardant polypropylene material:

[0094] 1) Weigh raw materials by weight, pre-mix 70 parts of dry copolymerized polypropylene (K8003) and 0.5 part of white oil in a double-motion mixer for 5 minutes, the speed of the double-motion mixer body is 20rpm, and the speed of the internal blades is 30rpm, the tilt angle of the body is 0° to achieve uniform mixing.

[0095] 2) Add in parts by weight, 15 parts of piperazine pyrophosphate, 15 parts of surface modified ammonium polyphosphate (APP-70), 0.5 part of coupling agent, 0.2 part of compatibilizer, 0.2 part of antioxidant, 0.2 part of light Stabilizer, double-motion mixer body speed is 30rpm, internal blade speed is 40rpm, body tilt angle is 0°, continue mixing for 5 minutes to obtain a homogeneous mixture.

[0096] 3) See Examp...

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Abstract

The invention relates to a high-melt-index halogen-free flame-retardant polypropylene material and a preparation method thereof. The high-melt-index halogen-free flame-retardant polypropylene materialcomprises the following components in parts by weight: 60 to 80 parts of polypropylene base material, 0.1 to 20 parts of pyrophosphoric acid piperazine, 0.1 to 20 parts of surface modified ammonium polyphosphate, 0 to 10 parts of melamine or salt thereof, 0.1 to 3 parts of coupling agent, 0.1 to 3 parts of compatilizer, 0.1 to 3 parts of antioxygen, 0.1 to 3 parts of light stabilizer, and 0.1 to1 part of white oil. The preparation method comprises the steps of weighing the raw materials in parts by weight, premixing the dried polypropylene base material and the dried white oil in a dual-motion mixer for 5 to 8 minutes, and uniformly mixing; adding the pyrophosphoric acid piperazine, the surface modified ammonium polyphosphate, the melamine or the salt thereof, the coupling agent, the campatilizer, the antioxygen and the light stabilizer according to the parts by weight, and continuously mixing for 5 to 8 minutes so as to obtain a uniform mixture; and putting in a charging hole of a double-screw extruder, mixing and extruding the materials through a screw rod, and extruding from a die head. Compared with the prior art, the halogen-free polypropylene material provided by the invention can effectively solve the problems such as high pollution of a traditional triazine carbon-forming agent system, poor compatibility of a flame retardant and a matrix, and low flame retardant efficiency.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant materials, and in particular relates to a high-melting-point halogen-free flame-retardant polypropylene material and a preparation method thereof. Background technique [0002] Polypropylene (PP) is one of the fastest-growing general-purpose plastics. It has excellent impact resistance, acid and alkali resistance, corrosion resistance, temperature resistance, low density and excellent mechanical properties. Its preparation raw materials are mainly derived from petroleum by-products, the price is low, and its excellent processing performance makes it an excellent substitute for wood, ceramics, metal, glass and other products, and is widely used in electronic appliances, packaging, auto parts, textiles , home appliances, construction and many other fields. In particular, polypropylene materials with higher fluidity have more significant advantages in the preparation of larger parts. Larger...

Claims

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Application Information

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IPC IPC(8): C08L23/14C08L23/12C08L91/06C08K5/3462C08K5/3492C08K3/32C08K9/06C08K9/10
CPCC08L23/14C08L23/12C08L2201/02C08L2201/22C08K2003/323C08L91/06C08K5/3462C08K5/34922C08K5/34928C08K3/32C08K9/06C08K9/10
Inventor 肖雄胡爽叶文许肖丽林倬仕李平阳尹亮
Owner SHANGHAI RES INST OF CHEM IND
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