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Biodegradable thermoplastic polyurethane elastomer foam beads and preparation method thereof

A thermoplastic polyurethane and foamed bead technology, applied in the polymer field, can solve the problems of difficulty in decomposition of foamed particles, environmental pressure, aggravated white pollution, etc., and achieve the effect of excellent biodegradation effect.

Active Publication Date: 2020-09-18
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, thermoplastic polyurethane elastomer foamed particles are difficult to decompose, and after a large amount of use, it will cause huge pressure on the environment and aggravate white pollution.

Method used

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  • Biodegradable thermoplastic polyurethane elastomer foam beads and preparation method thereof
  • Biodegradable thermoplastic polyurethane elastomer foam beads and preparation method thereof
  • Biodegradable thermoplastic polyurethane elastomer foam beads and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Mix 50 parts by mass of PPC and 50 parts by mass of PLA to obtain bio-based polyols, then mix 100 parts by mass of bio-based polyols, 43 parts by mass of MDI, 12 parts by mass of 1,4-butanediol, 1 part by mass of UV-531 and 0.2 parts by mass of catalyst (T-9, stannous octoate) are injected into the twin-screw extruder through the pouring machine, wherein the ten zone temperatures of the screw extruder are respectively 120°C, 140°C, 140°C, 150°C, 150°C, 150°C, 170°C, 180°C, 170°C, 160°C, quantitatively add 3 parts by mass of physical foaming agent CO at the tenth temperature zone 2 , making TPU polymer melt with CO 2 Mix evenly to obtain a homogeneous system, foam through a die, and obtain biodegradable thermoplastic polyurethane elastomer foamed beads through underwater pelletizing, dehydration, and drying. Among them, the mold temperature is 180°C, the water temperature is 40°C, the speed of the pelletizer is 2600r / min, and the drying time conditions are: 70°C for 4 h...

Embodiment 2

[0036] 50 parts by mass of PPC and 50 parts by mass of PCL were fully mixed to obtain bio-based polyols, and then 100 parts by mass of bio-based polyols, 43 parts by mass of MDI, 12 parts by mass of 1,4-butanediol, 1 part by mass of UV- 531 and 0.2 mass parts catalyst (T-9, stannous octoate) were injected into the twin-screw extruder through the pouring machine, wherein the ten zone temperatures of the screw were 120°C, 140°C, 140°C, 150°C, 150°C , 150°C, 170°C, 180°C, 170°C, 160°C, quantitatively add 3 parts by mass of physical foaming agent CO in the tenth temperature zone 2 , making TPU polymer melt with CO 2 Mix evenly to obtain a homogeneous system, foam through a die, and obtain biodegradable thermoplastic polyurethane elastomer foamed beads through underwater pelletizing, dehydration, and drying. Among them, the mold temperature is 180°C, the water temperature is 40°C, the speed of the pelletizer is 2600r / min, and the drying time conditions are: 70°C for 4 hours.

Embodiment 3

[0038] Mix 50 parts by mass of PCL and 50 parts by mass of PLA to obtain bio-based polyols, then mix 100 parts by mass of bio-based polyols, 43 parts by mass of MDI, 12 parts by mass of 1,4-butanediol, 1 part by mass of UV-531 and 0.2 parts by mass of catalyst (T-9, stannous octoate) are injected into the twin-screw extruder through the pouring machine, wherein the ten zone temperatures of the screw are respectively 120°C, 140°C, 140°C, 150°C, 150°C, 150°C, 170°C, 180°C, 170°C, 160°C, quantitatively add 3 parts by mass of physical blowing agent CO at the tenth temperature zone 2 , making TPU polymer melt with CO 2 Mix evenly to obtain a homogeneous system, foam through a die, and obtain biodegradable thermoplastic polyurethane elastomer foamed beads through underwater pelletizing, dehydration, and drying. Among them, the mold temperature is 180°C, the water temperature is 40°C, the speed of the pelletizer is 2600r / min, and the drying time conditions are: 70°C for 4 hours.

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Abstract

The present invention relates to the technical field of polymers, and relates to a biodegradable thermoplastic polyurethane elastomer foam beads and a preparation method therefor. The polyurethane elastomer beads are composed of the following substances in parts by mass: 100-200 parts of a bio-based polyol; 20-100 parts of isocyanate; 10-100 parts of a small molecular alcohol chain extender; 0.1-10 parts of an ultraviolet absorber; 0.1-10 parts of a catalyst; and 1-20 parts of a physical foaming agent; the bio-based polyol is a combination of two or more from among polymethylethylene carbonate diol (PPC), polycaprolactone diol (PCL), polylactic acid (PLA) or polyglycolide (PGA). The prepared foam beads may rapidly be degraded in addition to guaranteeing the original foaming rate, strength and density, and may be widely used in packaging and other industries. Meanwhile, further provided by the present invention is a preparation method therefor, which is scientific and reasonable, simple and easy to implement.

Description

technical field [0001] The invention relates to a biodegradable thermoplastic polyurethane elastomer foamed bead and a preparation method thereof, belonging to the technical field of polymers. Background technique [0002] Thermoplastic polyurethane elastomer is a kind of special polymer material with excellent performance and wide application range, whose performance and processing technology are between plastic and rubber. The foamed material prepared with thermoplastic polyurethane elastomer as the matrix not only retains the excellent properties of the original matrix, but also obtains excellent resilience, and can be used in a relatively wide temperature range. At present, most foamed thermoplastic elastomers are foamed by chemical foaming agents. The use of such foaming agents will cause environmental pollution and will not decompose for a long time. Physical supercritical foaming has become an international research hotspot due to its advantages of environmental prot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/12C08G18/44C08G18/32C08G18/42C08G18/75C08G18/76C08G18/66C08K5/132C08K5/3475
CPCC08G18/3206C08G18/4266C08G18/4277C08G18/4283C08G18/44C08G18/6607C08G18/755C08G18/7614C08G18/7671C08G2230/00C08J9/0023C08J9/0028C08J9/122C08J2203/06C08J2375/06C08K5/132C08K5/3475
Inventor 陈淑海刘凯良陈海良高振胜宋小娜
Owner SHANDONG INOV POLYURETHANE