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Polyurethane resin composition for synthetic leather with discoloration effect and preparation method thereof

A polyurethane resin and composition technology, applied in polyurea/polyurethane coatings, coatings, textiles and papermaking, etc., can solve the problems of poor discoloration effect of wax powder, scrapping of synthetic leather products, yellowing of coatings, etc., and achieve film formation Good effect, suitable drying speed and smooth surface

Inactive Publication Date: 2014-11-05
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the wax powder used for the effect layer of synthetic leather on the market has poor discoloration effect, and in the secondary processing and use of synthetic leather, because the wax powder used is silica, the compatibility with polyurethane resin is poor , easy to migrate to the surface of the leather and precipitate (commonly known as "spit wax" in the industry), and appear on the leather surface in vain, especially in winter, this phenomenon is more prominent
And the coating is prone to yellowing, which leads to the scrapping of synthetic leather products

Method used

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  • Polyurethane resin composition for synthetic leather with discoloration effect and preparation method thereof
  • Polyurethane resin composition for synthetic leather with discoloration effect and preparation method thereof
  • Polyurethane resin composition for synthetic leather with discoloration effect and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take 2.5 parts of color-changing wax, 1.5 parts of hydrophobic silicon dioxide, 1.5 parts of hydroxyalkyl polysiloxane, 20 parts of petroleum ether, stir well, then add 61.5 parts of N-dimethylformamide, stir well, and then stir While adding 30 parts of silicone-modified aliphatic polyurethane resin, stirring evenly, filtering, and discarding the filter residue, the above-mentioned polyurethane resin composition for synthetic leather with discoloration effect is obtained.

Embodiment 2

[0018] 3.5 parts of discoloration wax, 1.0 parts of hydrophobic silicon dioxide, 2.0 parts of hydroxyalkyl polysiloxane, 25 parts of petroleum ether, stir evenly, then add 60 parts of N-dimethylformamide, stir evenly, and then stir While adding 30 parts of silicone-modified aliphatic polyurethane resin, stirring evenly, filtering, and discarding the filter residue, the above-mentioned polyurethane resin composition for synthetic leather with discoloration effect is obtained.

Embodiment 3

[0020] 4.0 parts of color-changing wax, 0.5 parts of hydrophobic silicon dioxide, 2.5 parts of hydroxyalkyl polysiloxane, 30 parts of petroleum ether, stir well, then add 56.5 parts of N-dimethylformamide, stir well, and then stir While adding 30 parts of silicone-modified aliphatic polyurethane resin, stirring evenly, filtering, and discarding the filter residue, the above-mentioned polyurethane resin composition for synthetic leather with discoloration effect is obtained.

[0021] The above organosilicon-modified aliphatic polyurethane resin can be prepared by using commercially available products and techniques disclosed in existing documents.

[0022] The ratio of N-dimethylformamide to petroleum ether will be different in spring, summer, autumn and winter. In summer, the proportion of petroleum ether is appropriately increased, and in winter, the proportion of petroleum ether is appropriately reduced, mainly according to the different volatilization of solvents in differen...

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Abstract

The invention discloses a polyurethane resin composition for synthetic leather with discoloration effect and a preparation method thereof. The polyurethane resin composition is prepared from the following components in parts by mass: 30-40 parts of organosilicon-modified aliphatic polyurethane resin, 40-70 parts of N-dimethylformamide, 20-30 parts of petroleum ether, 2-5 parts of discoloration wax, 0.5-2 parts of hydrophobic silicon dioxide and 1-3 parts of hydroxyl-terminated alkane polysiloxane. The invention uses the yellowing-resistant organosilicon-modified aliphatic polyurethane resin and discoloration wax, and especially C15-C20 higher fatty acid esters matched with other raw materials into the synthetic leather effect layer, thereby obtaining the polyurethane resin-wax composition which has the characteristics of high temperature resistance, yellowing resistance, high stability, no wax precipitation, favorable discoloration effect and the like.

Description

technical field [0001] The invention relates to a polyurethane resin composition, in particular to a polyurethane resin composition for synthetic leather with discoloration effect and a preparation method of the composition. Background technique [0002] Polyurethane synthetic leather is composed of base fabrics such as non-woven fabrics, woven fabrics or woven fabrics, polyurethane resin layers and surface treatment layers. Polyurethane synthetic leather can be divided into dry-process polyurethane artificial leather and wet-process polyurethane artificial leather according to the different polyurethane film-forming processes. The so-called dry-process polyurethane artificial leather refers to the semi-finished product of a multi-layer structure composed of a multi-layer film and a base cloth obtained after the solvent in the solvent-based polyurethane resin is volatilized, and then surface treated to make various styles and styles. Surface properties of synthetic leather....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D183/06C09D7/12D06M15/564D06M15/643D06M13/224D06M11/79D06N3/14
Inventor 朱春凤
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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