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Anti-yellowing polyurethane foam and preparation method thereof

A polyurethane foam and anti-yellowing technology, which is applied in the field of foam, can solve the problems of impact and easy yellowing, and achieve the effects of good toughness, high strength, and improved yellowing resistance

Inactive Publication Date: 2018-06-01
JIANGSU SIRUIDA NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing polyurethane foam is prone to yellowing after being used for a period of time in a high-humidity and high-heat environment, which affects its use. In view of this, it is necessary to improve the traditional polyurethane foam and its preparation method

Method used

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  • Anti-yellowing polyurethane foam and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0022] Yellowing resistant polyurethane foam, including the following components in parts by weight: 60 parts of composite polyol, 15 parts of diphenylmethane diisocyanate, 5 parts of dibutyltin dilaurate, 9 parts of ethylene glycol, and hexamethylene 7 parts of diisocyanate, 6 parts of citric acid, 3 parts of dimethyl silicone oil and 2 parts of water.

[0023] Among them, the composite polyol includes the following components by weight: 22 parts of polyoxypropylene glycol, 16 parts of polyoxytetramethylene glycol, 11 parts of polycarbonate diol and propylene oxide-ethylene oxide copolymer 8 parts of ether triol.

[0024] The preparation method of yellowing-resistant polyurethane foam includes the following preparation steps:

[0025] S1. Add the composite polyol, isocyanate, dibutyltin dilaurate and water into the reaction kettle, stir evenly, heat to 65°C, and react for 1 hour;

[0026] S2. Raise the temperature of the reactor to 80°C, add ethylene glycol and hexamethylene diisocy...

Embodiment 2

[0031] Yellowing resistant polyurethane foam, including the following components in parts by weight: 70 parts of composite polyol, 17 parts of 1,6-hexamethylene diisocyanate, 12 parts of dibutyltin dilaurate, 12 parts of ethylene diamine, hexamethylene 8 parts of diisocyanate, 7 parts of citric acid, 4 parts of dimethicone and 3 parts of water.

[0032] Among them, the composite polyol includes the following components in parts by weight: 25 parts of polyoxypropylene glycol, 18 parts of polyoxytetramethylene glycol, 14 parts of polycarbonate diol, and propylene oxide-ethylene oxide copolymer 11 parts of ether triol.

[0033] The preparation method of yellowing-resistant polyurethane foam includes the following preparation steps:

[0034] S1. Add the composite polyol, isocyanate, dibutyltin dilaurate and water into the reaction kettle, stir evenly, heat to 70°C, and react for 2h;

[0035] S2. Raise the temperature of the reactor to 88°C, add ethylenediamine and hexamethylene diisocyan...

Embodiment 3

[0040] Yellowing resistant polyurethane foam, including the following components in parts by weight: 80 parts of composite polyol, 22 parts of 1,6-hexamethylene diisocyanate, 17 parts of dibutyltin dilaurate, 15 parts of triethylenetetramine, hexamethylene 10 parts of methyl diisocyanate, 9 parts of citric acid, 5 parts of dimethyl silicone oil and 4 parts of water.

[0041] Among them, the composite polyol includes the following components by weight: 28 parts of polyoxypropylene glycol, 21 parts of polyoxytetramethylene glycol, 17 parts of polycarbonate diol and propylene oxide-ethylene oxide copolymer 15 parts of ether triol.

[0042] The preparation method of yellowing-resistant polyurethane foam includes the following preparation steps:

[0043] S1. Add the composite polyol, isocyanate, dibutyltin dilaurate and water to the reaction kettle, stir evenly, heat to 75°C, and react for 3h;

[0044] S2. Raise the temperature of the reactor to 95°C, add triethylenetetramine and hexameth...

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Abstract

The invention discloses an anti-yellowing polyurethane foam, which is prepared from the following components in parts by weight: 60 parts of pluronic polyols, 15 parts of diphenylmethane diisocyanate,5 parts of di-n-butyltin dilaurate, 9 parts of ethylene glycol, 7 parts of hexamethylene diisocyanate, 6 parts of citric acid, 3 parts of dimethicone, and 2 parts of water. A preparation method of the anti-yellowing polyurethane foam comprises the steps of adding the citric acid and the hexamethylene diisocyanate during a preparation process, and soaking in a buffer solution after finishing foaming, so that the yellowing resistance of the foam can be well improved; meanwhile, the prepared anti-yellowing polyurethane foam is high in strength and good in toughness.

Description

Technical field [0001] The invention relates to the technical field of foam, in particular to a yellowing-resistant polyurethane foam and a preparation method thereof. Background technique [0002] Polyurethane is a polymer containing a urethane group in the main chain of the macromolecule, called polyurethane. Polyurethane is divided into two categories: polyester polyurethane and polyether polyurethane. It has many excellent properties. Has a wide range of uses. Under the same hardness, polyurethane material has higher bearing capacity than other elastomers, wear resistance, high impact resistance, wide rebound range, not affected by ozone erosion, radiation resistance, high mold resistance, and can be processed on standard equipment. It can also be bonded with wood, metal and most plastics to make noise-reducing materials, and its molding and processing costs are low. Polyurethane foam is made by polyurethane foam and has good elasticity, which is very common in daily life. ...

Claims

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Application Information

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IPC IPC(8): C08J9/40C08G18/73C08G18/76C08G18/66C08G18/48C08G18/44C08G18/34C08G18/32
CPCC08G18/3206C08G18/3228C08G18/3275C08G18/345C08G18/4018C08G18/44C08G18/4812C08G18/73C08G18/7671C08J9/40C08J2375/08
Inventor 高超
Owner JIANGSU SIRUIDA NEW MATERIAL TECH
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