A kind of anti-yellowing thermoplastic polyurethane foam material and preparation method thereof

A thermoplastic polyurethane and foam material technology, applied in plastic recycling, recycling technology and other directions, can solve the problem of anti-UV additives affecting the stability of thermoplastic polyurethane foam particle performance, anti-UV additives TPU yellowing, anti-UV additives The effect of reducing the effect is reduced, and the effect of good yellowing resistance, controllable foaming density and improving yellowing resistance can be achieved.

Active Publication Date: 2021-12-14
MIRACLL CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing disclosed patent technology is to improve the anti-yellowing performance of the material by adding a large amount of UV-resistant additives in the thermoplastic polyurethane resin raw material, but the following defects still exist in the prior art: (1) the addition of anti-UV additives cannot It is a problem to solve the essence of TPU yellowing at the source, and as the product is used for a long time, the effect of anti-UV additives will gradually decrease, and eventually the performance of the product will be greatly reduced and the service life will be shortened
However, the addition of a large amount of anti-UV additives will greatly affect the stability of the thermoplastic polyurethane elastomer synthesis process and the final performance of the subsequent thermoplastic polyurethane foamed particles

Method used

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  • A kind of anti-yellowing thermoplastic polyurethane foam material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Preparation of thermoplastic polyurethane foamed material which is resistant to yellowing, comprises hexamethylene diisocyanate 30kg, and 11kg of 1,4-butanediol, 100kg of polybutylene adipate diol and polytetrahydrofuran polyhydric alcohol in a mass ratio of the mixture consisting of a mixture ratio of 1, hindered phenolic antioxidant, benzotriazole ultraviolet absorber and a hindered amine light stabilizer into a twin screw reactive extruder at 150-180 deg.] C prepared by the reaction of the thermoplastic polyurethane elastomer, benzotriazole-based ultraviolet absorbers particularly designations TinuvinP, the specific amount of 0.5% of its total, a hindered amine light stabilizer in an amount of 0.5% of its total amount, specific grades of Tinuvin571, a softening point of the thermoplastic polyurethane elastomer particle was 90 ℃, Shore hardness of 40A, a melt index of 250g / 10min;

[0044] 100 parts by weight of the thermoplastic polyurethane elastomer, 30 parts by weigh...

Embodiment 2

[0047] Preparation of thermoplastic polyurethane foamed material which is resistant to yellowing, comprising a 70kg isophorone diisocyanate, 15kg of 1,4-butanediol, 100kg of polytetrahydrofuran polyol, a hindered phenolic antioxidant, benzo triazole-based ultraviolet absorber and a hindered amine light stabilizer into a twin-screw extruder prepared by reacting a hindered phenolic antioxidant of particular grades of Irganox 1010 antioxidant, specific dosage at 150-200 deg.] C of its total 0.05%, benzotriazole-based ultraviolet absorbers particularly designations Tinuvin 327, specifically the amount of 0.8% of its total, a hindered amine light stabilizer in an amount of 1% of its total specific designation Tinuvin 770 , thermoplastic polyurethane elastomer particle softening point of 160. deg.] C, a Shore hardness of 98A, a melt index of 5g / 10min;

[0048] 100 parts by weight of the thermoplastic polyurethane elastomer, 60 parts by weight of carbon dioxide and 500 parts by weight ...

Embodiment 3

[0051] Preparation of thermoplastic polyurethane foamed material which is resistant to yellowing, comprising a thermoplastic polyurethane elastomer from the hydrogenation of benzene 51kg dimethylene diisocyanate, 1,4-butanediol 12kg, 100kg of polybutylene adipate diol, a hindered phenolic antioxidant, benzotriazole ultraviolet absorber and a hindered amine light stabilizer into a twin-screw extruder prepared by reacting at 150-200 deg.] C, particularly hindered phenolic antioxidant is an anti grades oxygen agent of Irganox 1076, accounting for 0.1% of the total amount of concrete, the benzotriazole-based ultraviolet absorbers particularly designations Tinuvin312, specific dosage 1% of its total, a hindered amine light stabilizer is used in an amount of its total 2%, particularly under the designation Tinuvin 622, a softening point of the thermoplastic polyurethane elastomer particle was 125 deg.] C, a Shore hardness of 85A, a melt index of 100g / 10min;

[0052] 100 parts by weigh...

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Abstract

The invention relates to a yellowing-resistant thermoplastic polyurethane foaming material and a preparation method thereof, belonging to the field of polymer foaming materials. The yellowing-resistant thermoplastic polyurethane foaming material comprises an aliphatic diisocyanate, a chain extender, a poly The thermoplastic polyurethane elastomer obtained by reacting alcohol, antioxidant, UV absorber and UV light stabilizer, the softening point of the thermoplastic polyurethane elastomer is 90-160°C, the Shore hardness is 40A-98A, and the melt index is 5 -250g / 10min. The prepared yellowing-resistant thermoplastic polyurethane foam material has excellent yellowing-resistant performance, controllable foaming density and uniform cell size.

Description

technical field [0001] The invention belongs to the field of polymer foaming materials, and in particular relates to a yellowing-resistant thermoplastic polyurethane foaming material and a preparation method thereof. Background technique [0002] Using plastic as a matrix, a large number of air bubbles are filled inside the plastic by physical or chemical methods to obtain a polymer foam material. Foam materials have a series of advantages such as low density, heat and sound insulation, high specific strength, and cushioning, so they are widely used in packaging, industry, agriculture, transportation, military industry, aerospace industry, and daily necessities. Commonly used types of foam are polyurethane (PU) soft and rigid foam, polystyrene (PS) foam, polyethylene (PE) foam, polypropylene (PP) foam, etc. However, isocyanate is likely to remain in the foaming process of polyurethane foam, which is harmful to the human body, and the foamed material cannot be recycled. Pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/08C08L75/06C08J9/14C08J9/12C08G18/66C08G18/48C08G18/42C08G18/32
CPCC08J9/141C08J9/122C08J9/125C08G18/6607C08G18/6674C08G18/664C08G18/4854C08G18/4238C08G18/3206C08J2375/08C08J2375/06C08J2203/182C08J2203/06C08J2203/14C08J2375/04C08J2201/03C08J9/0023C08J9/0038C08J9/0028C08G18/73C08G18/4018C08G18/755C08G2110/0058C08G2110/005C08G18/757C08K5/1345C08K5/005C08K5/3435C08K5/3475C08L75/04C08G18/74C08K5/13C08K5/132C08K5/524C08K5/3492C08G2101/00C08G2110/00
Inventor 宋红玮王光阜杨冲冲任光雷钮华荣
Owner MIRACLL CHEM
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