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A low-odor, low-voc modified thermoplastic elastomer material and preparation method thereof

A thermoplastic elastomer and low-odor technology, applied in the field of polymer materials, can solve problems such as large VOC and large odor, and achieve the effects of preventing escape, reducing odor and VOC, and reducing the production of small molecular substances

Active Publication Date: 2021-04-16
联泓(江苏)新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the defects of relatively large odor and relatively large VOC in the later use process of thermoplastic elastomer materials in the prior art, the present invention provides a modified thermoplastic elastomer material with low odor and low VOC and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Use 20 parts of PP (random copolymer polypropylene PPR), 25 parts of SEBS, 32 parts of food-grade paraffin oil (flash point greater than 200 ° C), 0.6 parts of antioxidant, 20 parts of calcium carbonate, 0.3 parts of lubricant , 0.3 parts of acid absorbing agent, 0.3 parts of anti-aging agent. Mixed by a high-speed mixer, transferred to a twin-screw extruder with a length-to-diameter ratio of 48 and a total of 12 barrels for melt extrusion, the temperature of the melting section is 200°C, vacuum devolatilization on the 11-stage barrel, granulation and drying of the particles . Its odor is 3.5 (tested by PV 3900), and its VOC content meets the requirements of GB / T 27630-2011 (no benzene, formaldehyde, acetaldehyde, and acrolein were detected, and trace amounts of toluene, ethylbenzene, xylene, and styrene were detected. ).

Embodiment 2

[0021] Use 20 parts of PP (random copolymer polypropylene PPR), 28 parts of SEBS, 30 parts of food-grade paraffin oil (flash point greater than 200 ° C), 0.4 parts of antioxidant, 25 parts of calcium carbonate, 0.3 parts of lubricant , 0.6 parts of acid absorbing agent, 0.4 parts of anti-aging agent. Mix in a high-speed mixer, transfer to a twin-screw extruder with a length-to-diameter ratio of 48 and a total of 12 barrels for melt extrusion, the temperature of the melting section is 170°C, vacuum devolatilization on the 11-stage barrel, granulate and dry the particles . Its odor is 3.5 (tested by PV 3900), and its VOC content meets the requirements of GB / T 27630-2011 (no benzene, formaldehyde, acetaldehyde, and acrolein were detected, and trace amounts of toluene, ethylbenzene, xylene, and styrene were detected. ).

Embodiment 3

[0023] In the present invention, 5 parts of LDPE, 15 parts of SEBS, 15 parts of ordinary paraffin oil (flash point less than 200° C.), 0.2 part of antioxidant, 8 parts of calcium carbonate, and 0.2 part of lubricant. Mix in a high-speed mixer, transfer to a twin-screw extruder with a length-to-diameter ratio of 48 and a total of 12 barrels for melting and extrusion, the temperature of the melting section is 230°C, vacuum devolatilization on the 11-stage barrel, granulate and dry the particles . Its odor level is 4.0 (tested by PV 3900), and its VOC content meets the requirements of GB / T 27630-2011 (no formaldehyde, acetaldehyde, and acrolein were detected, and trace amounts of benzene, toluene, ethylbenzene, xylene, and styrene were detected. ).

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Abstract

The invention discloses a modified thermoplastic elastomer material with low odor and low VOC, which consists of 5-35 parts of polyethylene resin, 10-40 parts of SEBS, 10-50 parts of food-grade paraffin oil, 0.1-1.0 parts Antioxidant, 5-35 parts of calcium carbonate, 0.1-0.5 parts of lubricant, 0.01-1.0 parts of acid absorbing agent and 0.1-1.0 parts of anti-aging agent. Raw materials with low odor and low VOC content are used, and a small amount of auxiliary antioxidants, lubricants, acid absorbers and anti-aging agents are used to chemically react with small molecules generated during the preparation, thereby completely reducing the odor and VOC of the material. Different temperature zones during material making ensure that the rubber is fully plasticized in the screw, which greatly reduces the generation of small molecular substances during the material making process. At the same time, the modified calcium carbonate is used to absorb small molecules by using its internal nested apertures. substance, to prevent escape; so the material of the present invention has been used for as long as one year, and its odor (level) is still ≤ 3.0 level and the VOC content reaches the GB / T 27630‑2011 index requirement.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to a polyethylene-modified thermoplastic elastomer material with low odor and low VOC and a preparation method thereof. Background technique [0002] Styrene-based elastomer (SEBS) is styrene-butadiene-styrene (SBS) is a thermoplastic elastomer that has been hydrogenated and hydrogenated. It has good thermal stability, easy processing, environmental protection, high and low temperature resistance and low odor. And lower VOC (volatile organic compounds, volatile organic compounds) content and other advantages, therefore, the application and promotion of SEBS thermoplastic elastomers are still worthy of research and development. [0003] At present, thermoplastic elastomer materials with low odor and low VOC are mainly blended by SEBS filled paraffin oil, polypropylene, fillers and various additives. But raw materials such as paraffin oil, polypropylene, fillers and additiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L91/06C08L53/02C08L23/14C08L23/06C08L23/08C08K13/06C08K9/00C08K3/26
Inventor 李鸣峰韦景然吴集钱李方
Owner 联泓(江苏)新材料研究院有限公司
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