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TPU grafted and OBC modified thermoplastic polyurethane elastomer foam material and preparation method thereof

A technology of thermoplastic polyurethane and foaming materials, which is applied in the field of TPU graft-OBC modified thermoplastic polyurethane elastomer foaming materials and its preparation, and achieves the effects of simple steps, increased elongation at break, and excellent performance

Active Publication Date: 2020-11-03
兴邦新材料(山东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on the methods of OBC graft copolymers. Therefore, the research and development of OBC graft copolymers has important scientific significance and application value in improving the compatibility of toughened modified materials OBC and thermoplastic polyurethane elastomers.

Method used

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  • TPU grafted and OBC modified thermoplastic polyurethane elastomer foam material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment is to prepare a TPU graft-OBC modified thermoplastic polyurethane elastomer foaming material, and the specific steps are as follows:

[0029] The first step: first prepare the modified OBC. With ethylene-octene block copolymer as matrix material, polar graft modifier methyl methacrylate (GMA) as graft monomer, dicumyl peroxide as initiator, 94 parts of OBC, 4 parts of GMA and 0.3 part of dicumyl peroxide were placed in a mixer, and at 35°C, the stirring speed was controlled to be 75r / min, and the stirring at a low speed was carried out for 6 minutes to form a modified mixture; the modified mixture was placed in a double Melt grafting reaction is carried out in the screw extruder, the barrel temperature is controlled to be 150, 153, 158, 162, 162, 162, 162, 160°C in zone I to zone VIII respectively, and the speed of controlled reaction twin-screw extruder is 130r / min, extruded and pelletized to obtain polar agent grafted modified OBC pellets, namely modi...

Embodiment 2

[0034] This embodiment also prepares a kind of TPU graft-OBC modified thermoplastic polyurethane elastomer foaming material, and its preparation step is consistent with embodiment 1, and difference is as follows:

[0035] 1) The polar graft modifier for preparing modified OBC is maleic anhydride, and each component is calculated by weight: 95 parts of OBC, 3 parts of maleic anhydride, 0.4 part of dicumyl peroxide, extruder Extrude at a rotational speed of 110r / min to prepare a modified OBC for future use.

[0036] 2) Prepare TPU grafted-OBC pellets, weigh 82 parts of TPU by weight, and 20 parts of the above-mentioned modified OBC; after mixing, stir at a high speed of 1000r / min in a high-speed mixer for 15min, temperature control At 80°C, make the modified OBC compatible with TPU, and then extrude and granulate.

[0037] 3) prepare TPU masterbatch, its foaming agent 5 parts, is azodicarbonamide and calcium carbonate mixture; Antioxidant 7 parts, is antioxidant 1076; Stabilize...

Embodiment 3

[0039] This embodiment is to prepare a kind of TPU graft-OBC modified thermoplastic polyurethane elastomer foaming material equally, and the step of its preparation is also consistent with embodiment 1, difference is:

[0040] 1) The polar graft modifier for preparing modified OBC is a mixture of acrylic acid and GMA, and the components of modified OBC are calculated in parts by weight: 96 parts of OBC, 3 parts of acrylic acid, 3 parts of GMA, diisopropyl peroxide 0.5 part of benzene was extruded at an extruder speed of 120 r / min to obtain a modified OBC.

[0041] 2) Prepare TPU graft-OBC pellets, which take 70 parts by weight of TPU, 30 parts of the above-mentioned modified OBC; after mixing, stir at a high speed of 800r / min in a high-speed mixer for 20min, and the temperature The temperature is controlled at 90°C to make the modified OBC and TPU compatible, and then extruded and granulated.

[0042] 3) Preparation of TPU masterbatch, 0.5 parts of foaming agent, which is exp...

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Abstract

The invention discloses a TPU grafted and OBC modified thermoplastic polyurethane elastomer foam material and a preparation method thereof. The foam material comprises the following components in parts by weight: 70-85 parts of TPU, 10-30 parts of modified OBC, 0.5-6 parts of a foaming agent, 0.2-10 parts of an antioxidant, 0.3-8 parts of a stabilizer and 0.2-5 parts of a foam stabilizer. The modified OBC is prepared by taking an ethylene-octene block copolymer as a base material, a polar grafting modifier as a grafting monomer and dicumyl peroxide as an initiator through a melt grafting reaction; the components are proportionated according to the ratio as follows, in parts by weight: 92 to 97 parts of OBC, 2 to 8 parts of polar grafting modifier and 0.2 to 0.6 part of dicumyl peroxide. The preparation method is simple in steps, the technological process is easy to control, the TPU foam material grafted with the modified OBC is excellent in performance, the strength, elasticity and low-temperature resistance of the TPU foam material are remarkably improved, the cost is low, and the application value is extremely high.

Description

technical field [0001] The invention relates to a TPU graft-OBC modified thermoplastic polyurethane elastomer foaming material and a preparation method thereof. Background technique [0002] There are many physical cross-links formed by hydrogen bonds between the molecular chains of thermoplastic polyurethane elastomer (TPU), and the hydrogen bonds strengthen its shape, so it has high strength, excellent wear resistance, chemical resistance and mold resistance It is widely used in many fields such as shoe materials, clothing, automobiles, construction, and national defense. Among them, in the field of shoe materials that are closely related to people's lives, with the continuous popularity of Adidas boost series sports shoes, TPU foam materials are more and more widely used in the field of shoe sole manufacturing. Compared with traditional EVA foam, it has low density, It has the advantages of light weight, good resilience performance, low compression set rate and environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L51/00C08L83/10C08K13/02C08K5/09C08K3/22C08J9/08C08J9/10C08J9/32C08F287/00C08F220/32C08F220/06C08F222/06
CPCC08J9/08C08J9/103C08J9/32C08J9/0061C08J9/0066C08J9/0023C08J9/0095C08F287/00C08J2375/08C08J2451/06C08J2203/02C08J2203/04C08J2203/18C08J2203/22C08F220/325C08F222/06C08F220/06
Inventor 岳兴龙方超
Owner 兴邦新材料(山东)有限公司