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Oil-resistant weather-resistant thermoplastic polyurethane elastomer and preparation method thereof

A thermoplastic elastomer and polyurethane technology, applied in the field of elastomer and its preparation, can solve the problems of loss of original performance, lower oil quality, cracking of elastomer, etc., achieve excellent oil resistance and weather resistance, and low oil colloid content , the effect of good weather resistance

Inactive Publication Date: 2017-10-27
SHANGHAI HENGAN POLYURETHANE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, software oil storage bags are used in various fields such as military affairs, scientific research and investigation, and earthquake relief. The elastomer of the oil storage bag is mostly made of thermoplastic polyurethane elastomer that can provide high strength, high elasticity and other properties, but its weather resistance and ultraviolet radiation resistance are slightly poor, and it is usually necessary to add additives, but long-term storage of oil will degrade the material The additives in the oil are extracted out to precipitate colloid, which reduces the stability of the polymer and shortens the expected service life of the oil storage bag; and the oil is soaked in contact with the polymer, causing the extracted colloid to affect the quality of the oil and reduce the oil quality. Quality; In addition, ordinary thermoplastic polyurethane elastomers have poor resistance to ultraviolet radiation. When placed outdoors, the sun and rain will accelerate their aging, causing cracks from the surface to the inside of the elastomer, and then losing its original performance; therefore, long-term Under the condition of oil immersion, the weather resistance and ultraviolet radiation resistance of thermoplastic polyurethane need to be improved, and the long-term contact with oil (gasoline, diesel, aviation kerosene, etc.) leads to the precipitation of colloids in the material and the pollution of oil products.

Method used

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  • Oil-resistant weather-resistant thermoplastic polyurethane elastomer and preparation method thereof
  • Oil-resistant weather-resistant thermoplastic polyurethane elastomer and preparation method thereof
  • Oil-resistant weather-resistant thermoplastic polyurethane elastomer and preparation method thereof

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preparation example Construction

[0032] The preparation method of the oil-resistant and weather-resistant polyurethane thermoplastic elastomer of the present invention comprises the following steps:

[0033] Step 1, weighing 40-70 parts of macromolecular polyol, 3-30 parts of small molecule chain extender, 0.05-1 part of macromolecular UV stabilizer, 0-1 part of antioxidant, 0-1 part of hydrolysis stabilizer, 0-100 parts per million concentration of catalyst, respectively placed at 30-150 ° C for 2-4 hours of dehydration;

[0034] Step 2, add the melted and dehydrated macromolecular polyol, small molecule chain extender and 5-50 parts of isocyanate melted at 50-120°C into the twin-screw reaction extruder for reaction, and simultaneously add macromolecular ultraviolet stabilizer, Antioxidant, hydrolysis stabilizer, catalyst, extrusion temperature is 130~250℃;

[0035] Step 3, in the twin-screw reaction extruder, the melt of the mixture is melted and fully mixed, and pelletized under water to obtain thermoplas...

Embodiment 1

[0038]The present invention proposes an oil-resistant and weather-resistant polyurethane thermoplastic elastomer. The raw materials are obtained by weight ratio: 40 parts of polybutylene adipate diol, 5 parts of diphenylmethane diisocyanate, 3 parts of 1,4-butanediol, 0.05 parts of 2-(4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl)-5-octyloxyphenol, 0.2 parts of antioxidant 1010, 0.2 parts of carbodiimide, 20 ppm of dibutyltin dilaurate.

[0039] The weighed polybutylene adipate diol, 1,4-butanediol, 2-(4,6-bis(2,4-dimethylphenyl)-1,3,5- Triazin-2-yl)-5-octyloxyphenol, antioxidant 1010, carbodiimide, and dibutyltin dilaurate were dehydrated at 30°C for 4 hours, and polybutylene adipate di Alcohol, 1,4-butanediol and diphenylmethane diisocyanate melted at 50°C are added to the twin-screw reaction extruder for reaction, and macromolecular UV stabilizers, antioxidants, hydrolysis stabilizers, and catalysts are added at the same time , the extrusion temperature is 200°C; the mix...

Embodiment 2

[0041] The present invention proposes an oil-resistant and weather-resistant polyurethane thermoplastic elastomer. Raw materials are obtained by weight ratio: 45 parts of polytetrahydrofuran ether glycol, 15 parts of p-phenylene diisocyanate, 10 parts of 1,3-propylene glycol, 1 part of bis(1,2,2 , 6,6-pentamethyl-4-piperidinyl) sebacate, 0.3 parts of antioxidant 1520, 50 ppm stannous octoate.

[0042] The weighed polytetrahydrofuran ether glycol, 1,3-propylene glycol, bis(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate, antioxidant 1520, octanoic acid The stannous was dehydrated at 50°C for 3.5 hours, polytetrahydrofuran ether glycol, 1,3-propanediol and p-phenylene diisocyanate melted at 60°C were added to the twin-screw reaction extruder for reaction. (1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate, antioxidant 1520, stannous octoate, the extrusion temperature is 180°C; in a twin-screw reaction extruder The mixture was melted and mixed thoroughly, and pelletized under water to...

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Abstract

The invention discloses an oil-resistant weather-resistant thermoplastic polyurethane elastomer and a preparation method thereof. An oil-resistant weather-resistant thermoplastic polyurethane composite material comprises the following raw material components in parts by weight: 40 to 70 parts of macromolecular polyhydric alcohols, 0.05 to 1 part of a macromolecular ultraviolet stabilizing agent, 5 to 50 parts of isocyanate, 3 to 30 parts of a micromolecular chain extending agent, 0 to 1 part of an antioxidant, 0 to 1 part of a hydrolytic stabilizing agent, and 0 to 100 ppm of a catalyst. The oil-resistant weather-resistant thermoplastic polyurethane elastomer can keep good mechanical properties of the oil-resistant weather-resistant thermoplastic polyurethane elastomer for a long time after being in contact with gasoline, diesel and aviation kerosene, and does not cause pollution to oil products; the colloid content of the oil products is low; through long-term oil product soaking, the prepared oil-resistant weather-resistant thermoplastic polyurethane elastomer still has high weather resistance; the ultraviolet radiation resistance is not influenced; the failure of stabilizing performance caused by a large amount of extraction loss of various types of stabilizing agents because of the oil products is avoided; the oil-resistant weather-resistant thermoplastic polyurethane elastomer has the characteristics of oil resistance and weather resistance.

Description

technical field [0001] The invention relates to an elastomer and a preparation method thereof, in particular to an oil-resistant and weather-resistant polyurethane thermoplastic elastomer and a preparation method thereof. Background technique [0002] At present, software oil storage bags are used in various fields such as military affairs, scientific research and investigation, and earthquake relief. The elastomer of the oil storage bag is mostly made of thermoplastic polyurethane elastomer that can provide high strength, high elasticity and other properties, but its weather resistance and ultraviolet radiation resistance are slightly poor, and it is usually necessary to add additives, but long-term storage of oil will degrade the material The additives in the oil are extracted out to precipitate colloid, which reduces the stability of the polymer and shortens the expected service life of the oil storage bag; and the oil is soaked in contact with the polymer, causing the ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08L75/08C08L67/02C08K5/3492C08K5/134C08K5/3435C08K5/375C08G18/42C08G18/48C08G18/44C08G18/66C08G18/32
CPCC08L75/06C08G18/3206C08G18/4238C08G18/44C08G18/4854C08G18/664C08G18/6674C08K5/1345C08K5/3435C08K5/3492C08K5/375C08L2201/08C08L2207/04C08L75/08C08L67/02C08K5/1515C08K5/20
Inventor 朱勇代丽聂昌军刘宝全
Owner SHANGHAI HENGAN POLYURETHANE CO LTD
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