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A kind of polyurethane soft foam anti-yellowing agent

A polyurethane soft foam and anti-yellowing technology, which is applied in the field of polyurethane, can solve the problems of polyurethane soft foam aging, appearance deformation, and insignificant anti-yellowing effect

Active Publication Date: 2019-08-16
汕头市八隅新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the research on improving the yellowing resistance of polyurethane soft foam with anti-yellowing agent still has certain limitations, especially under the conditions of long sunshine and strong ultraviolet rays, the anti-yellowing effect is still not significant, and the polyurethane soft foam added with anti-yellowing agent still has aging The phenomenon is obvious, resulting in serious deformation of the appearance and insufficient mechanical strength

Method used

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  • A kind of polyurethane soft foam anti-yellowing agent
  • A kind of polyurethane soft foam anti-yellowing agent

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preparation example Construction

[0053] The second aspect of the present invention provides a kind of preparation method of polyurethane soft foam anti-yellowing agent, comprising:

[0054] (1) Stir the powdery hindered phenol antioxidant, ultraviolet absorber and heat stabilizer evenly to obtain a solid mixture;

[0055] (2) Deep processing the solid mixture in (1) by means of grinding or hot melting;

[0056] (3) Add liquid phosphite to the mixture in step (2) and stir evenly to obtain the product.

[0057] In a preferred embodiment, the preparation method of yellowing agent for flexible polyurethane foam is as follows:

[0058] (1) The liquid components are divided into three groups according to their properties: liquid heating group, liquid grinding group and final addition group. The powdered components are divided into two groups according to their properties: powder heating group and powder grinding group.

[0059] (2) Heat the liquid heating group in step 1 to a suitable temperature, slowly add the...

Embodiment 1

[0072] Preparation of polyurethane soft foam anti-yellowing agent:

[0073] Heat 10g of hindered phenol antioxidant β-(3,5-di-tert-butyl-4-hydroxyphenyl) isooctyl propionate to 100°C, add triethylene glycol bis[β -(3-tert-butyl-4-hydroxyl-5-methylphenyl) propionate] 0.5g, hydroxylamine 0.3g, cool to room temperature, then add fluorescent whitening powder and other powdery components, using a three-roll mill After grinding, add 10 g of phosphite triphenyl phosphite and 2 g of ultraviolet absorber N'-methyl-N'-phenylformamidine and stir evenly to obtain the anti-yellowing agent.

[0074] Preparation of polyurethane soft foam:

[0075] At room temperature, the prepared anti-yellowing agent (5g) was added to polyoxypropylene glycol 100g, deionized water 7g, MC foaming agent 6.5g, silicon surfactant 6.5g, amine catalyst A-33 (2.8g) Stir rapidly for 150s. Add TDI80 / 20 (140g) to the above mixed solution, pour the mixed solution into a mold at 75°C for foaming, stop foaming whe...

Embodiment 2

[0077] Preparation of polyurethane soft foam anti-yellowing agent:

[0078] 10g of hindered phenol antioxidant β-(3,5-di-tert-butyl-4-hydroxyphenyl) isooctyl propionate, 2g of ultraviolet absorber N'-methyl-N'-phenylformamidine, Hydroxylamine 0.3g, fluorescent whitening agent 1g, after stirring and mixing, after adopting three-roller grinder to grind, obtain the anti-yellowing agent precursor, add phosphite poly(dipropylene glycol) phenyl phosphite 10g and stir and mix, namely Resistant to yellowing agents.

[0079] The preparation method of the flexible polyurethane foam is prepared with reference to the method in Example 1.

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Abstract

The invention discloses a polyurethane flexible foam anti-yellowing agent. The polyurethane flexible foam anti-yellowing agent comprises hindered phenol antioxidants, phosphite antioxidants and heat stabilizers. The polyurethane flexible foam anti-yellowing agent has the advantages that the polyurethane flexible foam anti-yellowing agent is excellent in anti-yellowing performance; the mechanical properties of polyurethane flexible foam can be obviously improved, and the polyurethane flexible foam anti-yellowing agent can be widely used for clothes and garments.

Description

technical field [0001] The invention relates to the technical field of polyurethane, more specifically, the invention relates to a polyurethane soft foam anti-yellowing agent. Background technique [0002] Polyurethane soft foam has a certain degree of elasticity and softness, and its cell structure is mostly open-cell, with good resilience, low density, breathability, heat preservation, sound absorption and other properties. As an advanced application of polyurethane soft foam, polyurethane soft foam can be added to clothing and clothing products, such as children's clothing, women's bras, etc. However, because it is a polymer material, in the process of processing clothing products, high temperature processing and exposure to oxygen, etc., aging will inevitably occur, resulting in deterioration of the appearance and performance of the final product, resulting in a decrease in the value of the product. In order to suppress the yellowing and degradation behaviors caused by ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/134C08K5/17C08K5/526C08K5/29C08K5/00C08G18/48C08J9/08C08J9/14C08G101/00
CPCC08G18/4825C08J9/08C08J9/145C08J2203/10C08J2203/142C08J2203/184C08J2375/08C08K5/0091C08K5/1345C08K5/17C08K5/29C08K5/526C08G2110/0008
Inventor 杨桂贤
Owner 汕头市八隅新材料有限公司