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Preparation method of ultrafine low precipitation red phosphorus inflaming retarding glass fiber reinforced nylon

An ultra-fine, red phosphorus technology, applied in the field of polymer materials, can solve problems such as the influence of particle size precipitation of red phosphorus powder that is not mentioned

Inactive Publication Date: 2012-06-13
NANJING HONGRUI PLASTIC PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] None of the above patent documents mentions the influence of the particle size of the red phosphorus powder on the precipitation

Method used

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  • Preparation method of ultrafine low precipitation red phosphorus inflaming retarding glass fiber reinforced nylon

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Embodiment Construction

[0029] Specific implementation plan

[0030] The following examples are used to further explain the present invention, but the present invention is not limited to these examples.

[0031] 1. Preparation of ultra-fine red phosphorus masterbatch

[0032] The red phosphorus with a particle size above 1250 meshes crushed by liquid nitrogen is mixed with 1% high temperature silicone oil, and then it is extruded and granulated with maleic anhydride grafted SBS in an extruder. The content of toughening agent in the masterbatch is 70%. It is superfine red phosphorus masterbatch A.

[0033] The red phosphorus crushed by liquid nitrogen with a particle size of 1250 mesh or more is mixed with 3% high-temperature silicone oil, and then is extruded and granulated with maleic anhydride grafted SEBS in an extruder. The content of toughening agent in the masterbatch is 50%. It is superfine red phosphorus masterbatch B.

[0034] The red phosphorus whose particle size is above 1250 meshes crushed by li...

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Abstract

The invention relates to a preparation method of an ultrafine low precipitation red phosphorus inflaming retarding glass fiber reinforced nylon. Raw materials comprise the following substances, by weight: 40-60% of nylon, 10-30% of ultrafine red phosphorus masterbatch, 5-15% of synergistic flame retardant, 5-30% of glass fiber and 1-5% of other auxiliaries. The ultrafine red phosphorus masterbatch is prepared by carrying out liquid nitrogen cryogenic grinding on red phosphorus to have a fineness higher than 1250 mesh; and carrying out melt blending on the red phosphorus, high temperature silicone oil and flexibilizer. The ultrafine low precipitation red phosphorus inflaming retarding glass fiber reinforced nylon is prepared by steps of: weighing the raw materials according to weight percentage; mixing well the raw materials in a high speed mixer; carrying out melt blending in a twin-screw extruder and adding the glass fiber simultaneously; and extruding for granulation. Technological conditions of the extruder are as below: a 1-2 zone temperature of the twin-screw extruder being 230-250 DEG C, a 3-4 zone temperature of 250-270 DEG C, a 5-6 zone temperature of 260-280 DEG C, a 7-8 zone temperature of 240-270 DEG C, a handpiece temperature of 230-250 DEG C and a screw revolving speed of 150-350 round / min.

Description

Technical field [0001] The invention relates to a preparation method of ultra-fine low-precipitation red phosphorus flame-retardant glass fiber reinforced nylon, which can be applied to the fields of electronic appliances, automotive engineering and the like, and belongs to the technical field of polymer materials. Background technique [0002] Red phosphorus flame-retardant glass fiber reinforced nylon material has high mechanical properties, good electrical properties, low smoke and low toxicity when burned, and will not bring secondary hazards to firefighting, and does not contain halogen, lead, cadmium, mercury, and hexavalent Hazardous substances such as chromium comply with EU RoHS environmental protection requirements and are widely used. However, red phosphorus is particularly easy to oxidize to phosphoric acid under high temperature and high humidity, and then react with some inorganic minerals in the material to produce phosphate. These acids and salts can easily migrat...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08L77/02C08L51/00C08K13/06C08K7/14C08K3/02C08K3/22C08J3/22B29C47/92B29C48/92
CPCB29B7/46B29B7/72B29B7/7461B29B7/90B29B9/06B29B9/12B29B9/14B29C48/04B29C48/40B29C48/875B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895C08K3/02C08K7/14C08L51/04C08L77/02C08L77/06C08L83/04C09K21/04
Inventor 张明支长勇邢强强韦嘉
Owner NANJING HONGRUI PLASTIC PROD
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