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A kind of polyurethane/polylactic acid thermoplastic vulcanizate and preparation method thereof

A technology of thermoplastic vulcanizate and polylactic acid, which is applied in the field of polyurethane/polylactic acid thermoplastic vulcanizate, can solve problems such as poor mechanical properties, and achieve the effects of increased mechanical strength, smooth appearance, and excellent mechanical properties

Inactive Publication Date: 2015-09-02
张家港市美特高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Also described in CN102827465A is a biodegradable bio-based thermoplastic vulcanizate, which is obtained by polycondensation of polybasic acid and polyhydric alcohol. The polyester-based bio-based elastomer and polylactic acid are mixed in a mixer, and then the vulcanizing agent is added and kneaded. The bio-based thermoplastic vulcanizate was obtained by dynamic vulcanization in the machine. Although the vulcanizate obtained by this method can have thermoplasticity and biodegradability, this method has the following disadvantages: its mechanical properties are poor, the tensile strength is 11.5MPa, and the elongation at break 170%; and the bio-based elastomer used is still in the stage of laboratory synthesis

Method used

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  • A kind of polyurethane/polylactic acid thermoplastic vulcanizate and preparation method thereof
  • A kind of polyurethane/polylactic acid thermoplastic vulcanizate and preparation method thereof
  • A kind of polyurethane/polylactic acid thermoplastic vulcanizate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] First, melt 80 parts by weight of PLA on a high-temperature open mill at 150°C at room temperature, add 1.5 parts by weight of antioxidant 1010 after covering the rolls; then add 120 parts by weight of PU, mix for 2 minutes, and add 3.0 parts by weight of compatibilizer MDI , kneaded for 2min, prepared the rubber-plastic premix, and released the sheet; on the open mill at room temperature, added 1.8 parts by weight of antioxidant RD and stearic acid of 1.2 parts by weight, kneaded for 2min, finally added 3.6 parts by weight of DCP, and mixed Mixed evenly; put the mixed sample into an internal mixer with a rotation speed of 100rpm and a mold cavity temperature of 150°C for dynamic vulcanization. The time is 10min. See Table 1.

Embodiment 2

[0049] The formulation components and dosage, process conditions and process flow are the same as in Example 1, except that the dosage of compatibilizer MDI is 4.0 parts by weight, and the performance test is shown in Table 1.

Embodiment 3

[0051] The formulation ingredients and dosage, process conditions and process flow are the same as in Example 1, except that the dosage of compatibilizer MDI is 5.0 parts by weight, and the performance test is shown in Table 1.

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Abstract

The invention relates to polyurethane / polylactic acid thermoplastic vulcanized rubber and a preparation method thereof. Through dynamic vulcanization, under the action of a shearing force produced by a high-temperature internal mixer, polyurethane rubber is vulcanized, the vulcanized polyurethane rubber is crushed into micron-sized rubber particles, and the micron-sized rubber particles are dispersed in a polylactic acid continuous phase so that the high-rubber content polyurethane / polylactic acid mixed thermoplastic vulcanized rubber is obtained. The polyurethane / polylactic acid thermoplastic vulcanized rubber obtained by the preparation method widens a polylactic acid material application field and provides a biodegradable and recyclable novel elastomer material.

Description

【Technical field】 [0001] The invention relates to a polyurethane elastomer and polylactic acid (PLA) blended thermoplastic vulcanizate, in particular to preparing a high mechanical strength and degradable polyurethane / polylactic acid thermoplastic vulcanizate by adopting reaction compatibilization and dynamic vulcanization technology. 【Background technique】 [0002] Thermoplastic vulcanizate (TPV) adopts dynamic vulcanization technology and is prepared by compounding resin materials and rubber elastomers. Under the conditions of high temperature and high shear, the rubber elastomer material undergoes cross-linking reaction, while being broken and dispersed under the action of shear force, and finally the rubber with three-dimensional network structure can be dispersed in the resin continuous phase with micron-sized particles. middle. This kind of material has the high elasticity of rubber at room temperature, and has the performance of plastic molding and processing at high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08L75/06C08L75/08C08L67/04C08K5/29C08K5/13C08K5/09C08K5/14B29C35/02
Inventor 段咏欣侯家瑞张建明高光涛
Owner 张家港市美特高分子材料有限公司
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