A kind of anti-yellowing agent and preparation method thereof

Abstract

The invention discloses a novel anti-yellowing agent and a preparation method thereof, wherein the novel anti-yellowing agent comprises, in parts by mass, 13-45 parts of an adamantane formylhydrazinederivative, 3-12 parts of alkylol amine, 2-8 parts of 1,2-aminoazophenylene, 3-15 parts of o-acetylsalicylic acid, 1-10 parts of lauryl alcohol polyoxyethylene ether, 10-40 parts of urea and 30-60 parts of distilled water; the adamantane formylhydrazine derivative is N-(chloroacetyl)-adamantane formylhydrazine or N-(2-phenylamino-acetyl)-adamantane formylhydrazine. The novel anti-yellowing agent has the advantages of low cost, no containing of harmful by-products (especially ADH), lasting anti-yellowing effect and no formaldehyde adsorption risk, and meets the environmental-protection requirements.

Description

technical field [0001] The invention belongs to the field of anti-yellowing finishing agents, in particular to a novel anti-yellowing agent and a preparation method thereof. Background technique [0002] Adipate dihydrazide (ADH) is a powdery solid with high melting point, which is prepared by the reaction of organic acid and hydrazine. It has a symmetrical bifunctional structure and is a good cross-linking agent. After hyaluronic acid is cross-linked, it can be used in medicine as a protein drug carrier, and it can be used in water-based resins when cross-linked with diacetone acrylamide. It can also be used as a latent curing agent for epoxy resin (EP). Fabric reaction, as fabric anti-yellowing agent, to avoid or slow down the tendency of fabric yellowing. [0003] Nylon-spandex blended fabric has good wear resistance, high strength, excellent elasticity, good moisture absorption and breathability, and is comfortable to wear. It is widely used in high value-added underwea...

AI Technical Summary

Problems solved by technology

Since the molecular chains of nylon and spandex fibers contain a large number of reactive groups such as amino groups, they tend to turn yellow during high-temperature setting or storage. This affects the quality of finished products, especially fluorescent whitening fabrics and light-colored fabrics.

[0004] Therefore, nylon and spandex and its blended fabrics often use anti-yellowing agents containing adipate dihydrazide (ADH) due to their anti-yellowing requirements, but the characteristics of ADH that can adsorb formaldehyde lead to materials containing ADH at a specific time and Under certain conditions, it can absorb formaldehyde in the environment, and re-release formaldehyde in weakly acidic and strongly alkaline environments to cause harm to the human body

[0005] CN103556459A discloses a composite anti-yellowing finishing agent for nylon, spandex and its blended fabrics, which is compounded with synergists, synergists and main antioxidants to form a composite anti-yellowing finishing agent for nylon, spandex and their blended fabrics , the mass percentage of its effective components is: synergist: 20-30%, preferred content: 22-28%; synergist: 20-35%, preferred content: 28-32%; main antioxidant: 40% -50%, preferred content: 43-46%, the composite anti-yellowing finishing agent can significantly improve the yellowing and color change of nylon, spandex and their blended fabrics during processing, but the main antioxidant in this invention The agent uses ADH, which is easy to absorb formaldehyde in the environment, resulting in the concentration of formaldehyde in the fabric not meeting the standard requirements, which will cause physical damage to end consumers

[0010] The finishing agent has good anti-oxidation and anti-yellowing properties, and can be applied to most textiles. However, the anti-oxidation conditioner has complex components, high cost, and high content of by-products and impurities produced during the production process, which affects the use effect of the product.

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