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A kind of bulk halogen-free flame-retardant TPU modified material and preparation method thereof

A modified material and ontology technology, applied in the field of flame retardant, can solve the problems of reducing the strength and toughness, tensile strength and aging resistance of materials, easy dripping, poor flame retardant effect, etc., and achieve flame retardant and various performance testing. The effect of uniform data and uniform dispersion

Active Publication Date: 2018-09-14
JINAN TAIXING FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the gradual improvement of the requirements for halogen-free environmental protection and flame retardant at home and abroad, the flame retardant effect of pure TPU products is poor and the melting point is low, which makes it easy to drip during the combustion process and cannot meet the requirements of UL94V0. The development of halogen-free flame retardants has become one of the hot spots in the flame retardant industry in recent years. However, according to the development of the market in recent years, there has been a disconnect between the manufacturers of materials and the manufacturers of flame retardants. In general, all flame retardants are basically additive flame retardants, that is, after the synthesis of TPU itself, flame retardants are added for modification. Although this method solves the flame retardant requirements of V0 level to a certain extent , but to a great extent reduces the excellent properties of the material such as strength, toughness, tension resistance and aging resistance. Individual performance data can be reduced by more than 40% after adding flame retardants. Many modified manufacturers can only combine flame retardants with other Choose in terms of performance

Method used

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  • A kind of bulk halogen-free flame-retardant TPU modified material and preparation method thereof
  • A kind of bulk halogen-free flame-retardant TPU modified material and preparation method thereof
  • A kind of bulk halogen-free flame-retardant TPU modified material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Melt polybutylene adipate at a temperature of 70°C and diphenylmethane diisocyanate at a temperature of 55°C for subsequent use, then heat the reactor body to 70°C, and heat the curing chopping board to 160°C. Then add 100 parts of polytetramethylene glycol adipate into the kettle, and then put in 17.5 parts of 1,4-butanediol and a very small amount of phosphoric acid in the environmental medium to make the amount of phosphoric acid in the system 3.5ppm, and then add 20 parts of city Sell ​​HT-219TPU special halogen-free flame retardant (Medium particle size is less than 8μm, Jinan Taixing Fine Chemical Co., Ltd., batch number 1505012) for stirring and mixing, nitrogen protection, after stirring for 50 minutes, add 63 parts of diphenylmethane diisocyanate , emulsified polymerization reaction for 80s. After the reaction, transfer the material to the chopping board for curing. After the material block is cooled and crushed, it is extruded and granulated to obtain the final...

Embodiment 2

[0028] Melt polyethylene glycol adipate (molecular weight: 2000) at a temperature of 75°C and 2,6-toluene diisocyanate at a temperature of 65°C for subsequent use, then heat the reaction vessel to 80°C, chopping board Heat to 150°C for later use, then add 100 parts of polyethylene glycol adipate into the kettle, put in 15 parts of 1,6-hexanediol and a very small amount of phosphoric acid in the environmental medium to make the amount of phosphoric acid in the system within 3ppm , then add 15 parts of ammonium polyphosphate (n ≥ 1000) for stirring and mixing, pass through nitrogen for protection, stir for 30 minutes and then add 75 parts of 2,6-toluene diisocyanate, emulsification polymerization reaction 60s, after the reaction, transfer the material to The chopping board is matured, and the block is cooled, crushed, extruded and granulated to obtain the final bulk halogen-free flame-retardant modified material. The performance indicators of this embodiment are shown in Table 3...

Embodiment 3

[0032] Melt poly(ethylene glycol phthalate) at 85°C and 2,4-toluene diisocyanate at 70°C respectively for later use, then heat the reactor body to 90°C and the chopping board to 170°C for later use, and then Add 100 parts of polyhexamethylene glycol phthalate into the kettle, put in 17 parts of neopentyl glycol and a very small amount of phosphoric acid in the environmental medium according to the calculated ratio, so that the amount of phosphoric acid in the system is within 4ppm, and then synthesize TPU raw materials according to the theory Add 10 parts of aluminum tert-butylphosphinate for stirring and mixing, pass in nitrogen for protection, stir for 50 minutes and then add 50 parts of 2,4-toluene diisocyanate to carry out emulsification polymerization reaction for 70s. After the reaction, transfer the material to Put it into the chopping board for curing, wait for the block to cool down, crush it, extrude and granulate to obtain the final bulk halogen-free flame-retardant ...

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Abstract

The invention discloses a body halogen-free flame retardant TPU modified material. The material is prepared from polyester polyol, isocyanate, halogen-free flame retardant, chain extender and a little amount of environmental medium phosphoric acid. Halogen-free flame retardancy of the synthesized TPU material is detected according to the vertical combustion testing standard and can meet the requirement of the UL 94 V0 level (1.6 mm), the flame retardant is dispersed more uniformly in the TPU material, detection data of flame retardancy and properties of all aspects are more uniform, and the problems that due to post-modification addition, dispersing is not uniform, and the flame retardant effect is instable are solved; in addition, compared with those of a pure raw material, stretching, the stretching rate, resilience and the modulus of the material are reduced only by about 12%, compared with that of a flame retardant modified material product sold in the market, all the properties are improved by over 20%, and the requirements of customers needing high-grade halogen-free flame retardancy in the aspect of TPU base materials can be met.

Description

technical field [0001] The invention relates to a bulk halogen-free flame-retardant TPU modified material and a preparation method thereof, belonging to the field of flame-retardant technology. Background technique [0002] Thermoplastic TPU elastomer, with a hardness range of 65A-85D, has three colors: natural color, transparent, and high transparency. Environmental protection material is the best environmental protection substitute for PVC material. At present, with the gradual improvement of environmental protection requirements in various fields, the application of its corresponding products is limited due to the high chlorine content of PVC itself, especially high-end customers such as high-end automotive interiors, high-end wall materials, etc. According to the requirements of halogen environmental protection, PVC material has been restricted beyond the "threshold", and wherever PVC is used, TPU can be a substitute for PVC. Compared with the advantages of TPU, PVC is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/42C08G18/32C08K3/32C08K5/5313
CPCC08G18/3206C08G18/4211C08G18/4238C08G18/664C08K3/32C08K5/5313C08K2003/323
Inventor 毕燕段金凤张旭肖学文
Owner JINAN TAIXING FINE CHEM
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