A kind of high heat-resistant v-0 flame retardant PP for toilet lid and production method thereof

A high heat-resistant, toilet lid technology, applied in the field of polymer materials, can solve problems such as defect rate exceeding 30%, poor appearance and black spots, narrow processing range, etc., to improve production qualified product rate, reduce appearance defect rate, good fluidity

Active Publication Date: 2020-08-04
杭州金州高分子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The temperature resistance of the material is low, and the injection molding processing temperature of the material is only between 175 ° C and 185 ° C, and the processing range is narrow. Friction causes the flame retardant to decompose, which causes the product to turn yellow. For white products with high requirements on appearance, a large number of defective appearance and black spots will occur, resulting in a defective rate of more than 30%.

Method used

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  • A kind of high heat-resistant v-0 flame retardant PP for toilet lid and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Mix low-halogen flame retardant (tetrabromobisphenol A), organophosphorus flame retardant (RDP) and organic nitrogen flame retardant (melamine) at a ratio of 1:4:5, and pre-synthesize in a reactor to obtain a composite flame retardant agent, the reaction temperature is 200±10°C;

[0038] 2) Take 89 parts of copolymerized polypropylene or / and homopolypropylene (the melt index of copolymerized polypropylene and homopolypropylene is 50g / 10min under the test conditions of 230°C and 2.16KG), 10 parts of composite flame retardant, Add 0.1 part of antioxidant 1010, 0.1 part of antioxidant 168, 0.2 part of ultraviolet absorber UV326, 0.1 part of light stabilizer UV944, and 0.5 part of calcium stearate, and add them to the mixer in turn, mix them thoroughly for 10 minutes, and put them into the twin-screw extruder The extruder is mixed and melted, and the processing temperature of the twin-screw extruder is: 150±5℃ in the first zone, 170±5℃ in the second zone, 180±5℃ in the t...

Embodiment 2

[0040] 1) Mix low-halogen flame retardant (tetrabromobisphenol A), organophosphorus flame retardant (RDP) and organic nitrogen flame retardant (melamine) at a ratio of 1:5:4, and pre-synthesize in a reactor to obtain a composite flame retardant agent, the reaction temperature is 200±10°C;

[0041] 2) 90 parts of copolymerized polypropylene or / and homopolypropylene (the melt index of copolymerized polypropylene and homopolypropylene is 10g / 10min under the test conditions of 230°C and 2.16KG), 8 parts of composite flame retardant, Antioxidant 1010 0.4 parts, antioxidant 1680.4 parts, antioxidant DSTP 0.4 parts, ultraviolet absorber UV326 0.2 parts, benzophenone 0.2 parts, light stabilizer UV944 0.1 parts, UV622 0.1 parts, polyethylene wax 0.1 parts , 0.1 parts of siloxane, added to the mixer in turn, after fully mixing for 10 minutes, put into the twin-screw extruder to mix and melt, the processing temperature of the twin-screw extruder is: 150±5℃ in the first zone, 170±5℃ in th...

Embodiment 3

[0043] 1) Mix low-halogen flame retardant (tetrabromobisphenol A), organophosphorus flame retardant (RDP) and organic nitrogen flame retardant (melamine) at a ratio of 1:4:5, and pre-synthesize in a reactor to obtain a composite flame retardant agent, the reaction temperature is 200±10°C;

[0044] 2) 83 parts of copolymerized polypropylene or / and homopolypropylene (the melt index of copolymerized polypropylene and homopolypropylene is 80g / 10min under the test conditions of 230°C and 2.16KG), 15 parts of composite flame retardant, Add 0.6 parts of antioxidant 1076, 0.6 parts of antioxidant 618, 0.1 parts of UV absorber UV531, 0.1 parts of light stabilizer UV622, 0.1 parts of UV770, and 0.5 parts of polyethylene wax. After 5 minutes, put it into the twin-screw extruder for mixing and melting. The processing temperature of the twin-screw extruder is: 150±5℃ in the first zone, 170±5℃ in the second zone, 180±5℃ in the third zone, 185±5℃ in the fourth zone, and 185±5℃ in the fifth z...

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Abstract

The invention provides high-heat-resisting V-0 flame-retarding PP (Polypropylene) for a toilet lid and a production method thereof and belongs to the technical field of high molecular materials. The high-heat-resisting V-0 flame-retarding PP is prepared from the following components in parts by weight: copolymerized polypropylene and / or homopolymerized polypropylene, a flame retardant, an ultraviolet absorbent, a light stabilizer, an antioxidant and a processing auxiliary agent. Compared with the prior art, the high-heat-resisting V-0 flame-retarding PP has the following advantages and excellent effects that 1) the organic compound flame retardant is utilized so that the color and luster on the surface of the material is ensured; the flame-retarding property of a product is improved and reaches a UL94 V0 grade; 2) the polypropylene material prepared by the invention meets performance requirements needed by the toilet lid, the appearance defect rate of the product is greatly reduced (the dark point defect rate is 5 percent or below), the rate of produced qualified products is improved and the cost waste is reduced; 3) the polypropylene material prepared by the invention has good flowability and high temperature resistance; normal processing and production can be realized at the highest processing temperature of 230 DEG C; the polypropylene material is not decomposed and does notbecome yellow.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a high heat-resistant V-0 flame-retardant PP for a toilet cover and a production method thereof. Background technique [0002] The production of flame-retardant polypropylene materials for toilet seats needs to meet the following requirements: 1) High gloss; 2) Flame-retardant V0 grade; 3) Mainly white, with uniform appearance, and the flame retardant does not decompose. [0003] At present, the use of flame-retardant PP materials for toilet seats on the market has the following problems: [0004] If it meets the requirements of high gloss and black spot control, the flame retardant grade cannot reach V0, and can only meet the V2 grade. [0005] It satisfies the flame retardant V0 grade, but due to the decomposition of the flame retardant (processing temperature 200°C), it leads to defects such as yellow edges and black spots on the product, and the scrap r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/14C08L23/12C08K5/136C08K5/523C08K5/3492B29C48/92
CPCB29C48/92B29C2948/92704C08K5/136C08K5/34922C08K5/523C08L23/12C08L23/14C08L2201/02C08L2201/08C08L2205/03
Inventor 王晓群陈家锋黄珂伟尹城龙肖敏
Owner 杭州金州高分子科技有限公司
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