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Low-smell 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: 2019-06-07
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 low-smell low-VOC modified thermoplastic elastomer material. The low-smell low-VOC modified thermoplastic elastomer material is composed of 5 to 35 parts of polyethylene resin, 10 to 40 parts of SEBS, 10 to 50 parts of food-grade paraffin oil, 0.1 to 1.0 part of an anti-oxidant, 5 to 35 parts of calcium carbonate, 0.1 to 0.5 part of a lubricant, 0.01 to 1.0 part of an acid absorption agent, and 0.1 to 1.0 part of an anti-aging agent. According to a preparation method, low smell and low VOC content raw materials are adopted, small amounts of auxiliary agents such as the anti-oxidant, the lubricant, the acid absorption agent, and the anti-aging agent are adopted for chemical reaction with small molecules generated in preparation process, so that material smell and VOC content are reduced thoroughly. In material preparation process, different temperature zones are adopted to ensure full plasticizing of rubber materials in a screw, so that generation of small molecular substances in material preparation process is reduced greatly, and in addition, modified calcium carbonate is adopted, the internal mutually nested channels are adopted in absorption of small molecular substances and prevention of escape of the small molecular substances. After using as long as one year, the smell grade of the low-smell low-VOC modified thermoplastic elastomer material is equal to or lower than 3 grade, and VOC content reaches index required in GB / T27630-2011.

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 Applications(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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