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PU adhesive for soft lens leather and preparation method thereof

An adhesive, soft mirror technology, applied in the direction of adhesive, adhesive type, polyurea/polyurethane adhesive, etc., to achieve the effect of low crystallinity, simple process and soft hand feel

Active Publication Date: 2020-07-10
YANGZHOU POLYTECHNIC INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Few of the PU adhesives on the market are suitable for dry application, and are resistant to silicone and plasticizer penetration while maintaining high peel strength and soft feel

Method used

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  • PU adhesive for soft lens leather and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]Example 1: Weigh 300g of polymethylpropylene adipate diol in a reaction flask, distill under reduced pressure at 110°C to remove water below 300ppm, add 0.2g of antioxidant BHT and 0.003g of phosphoric acid at the same time and stir well . Then add 71g of isocyanate (XDI) and stir evenly in the reaction flask to make it react at 70-80°C for 2h, then add 20.3g of methylpropanediol chain extender and organic solvent N,N-dimethylformamide to it. Carry out capping, continue to stir for 1 hour, and then wrap the material. This is the main ingredient, and the solid content is 60%. Add organic solvent butanone to another reaction bottle, then add 110g XDI and 17g glycerin to react at 70-80°C for 2 hours, cool and discharge, and prepare a curing agent with an NCO content of 10% and a solid content of 80%.

Embodiment 2

[0029] Example 2: Weigh 300g of polymethylpropylene sebacate diol in a reaction flask, distill under reduced pressure at 110°C to remove water below 300ppm, add 0.2g of antioxidant BHT and 0.003g of phosphoric acid at the same time and stir well . Then add 71g of isocyanate (XDI) and stir evenly in the reaction flask to make it react at 70-80°C for 2h, then add 20.3g of methylpropanediol chain extender and organic solvent N,N-dimethylformamide to it. Carry out capping, continue to stir for 1 hour, and then wrap the material. This is the main ingredient, and the solid content is 60%. Add the organic solvent dimethyl carbonate in another reaction bottle, then add 110g XDI and 25g trimethylolpropane, react at 70-80°C for 2h, add the organic solvent, cool and discharge, and prepare a solid NCO content of 10%. 80% curing agent.

Embodiment 3

[0030] Example 3: Weigh 300g of polyneopentyl glycol adipate diol in a reaction flask, distill under reduced pressure at 110°C to remove water below 300ppm, add 0.2g of antioxidant BHT and 0.003g of phosphoric acid at the same time and stir thoroughly uniform. Then add 71g of isocyanate (XDI) and stir evenly in the reaction flask to make it react at 70-80°C for 2h, then add 20.3g of methylpropanediol chain extender and organic solvent N,N-dimethylformamide to it. Carry out capping, continue to stir for 1 hour, and then wrap the material. This is the main ingredient, and the solid content is 60%. Add organic solvent acetone to another reaction flask, then add 110g XDI and 19g diethylenetriamine, react at 70-80°C for 2h, add organic solvent, cool and discharge, and prepare NCO content of 10%, solid content of 80% curing agent.

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Abstract

The invention relates to a PU adhesive for soft lens leather and a preparation method thereof. The preparation method comprises the following steps: adding polyester polyol and isocyanate into a reaction bottle, carrying out a stirring reaction for 2 h at a temperature of 70-80 DEG C, adding a diol chain extender and an organic solvent to block the end of the reaction bottle, continuously stirringfor 1 h, and carrying out material coating to obtain a main agent with a solid content of 60%; adding another organic solvent into another reaction bottle, reacting isocyanate with a trifunctional chain extender at 70-80 DEG C for 2 hours, cooling and discharging to obtain a curing agent with the NCO content of 10% and the solid content of 80%; mixing the main agent and the curing agent in proportion, and adding the organic solvent for dilution until the PU adhesive for the soft lens leather with the solid content of 40% is obtained. The PU adhesive for the soft lens leather is resistant to permeation of organic silicon and a plasticizer, and a matte surface is avoided when the PU adhesive is used for the soft lens leather; the product has higher peel strength, better hydrolysis resistance and mould resistance and softer hand feeling; the method has the advantages of simple preparation process, convenient operation and the like.

Description

technical field [0001] The invention relates to the field of PU adhesives, in particular to a PU adhesive for soft mirror leather and a preparation method thereof. Background technique [0002] The improvement of living standards has promoted the rapid upgrading of people's consumption levels, especially the handbags used by women have different styles and are updated frequently. In recent years, PU handbags for mirror leather have gradually emerged, which has changed people's old-fashioned impression of rubbed PU synthetic leather similar to genuine leather. Obviously different from traditional genuine leather and PU leather handbags, PU bags for mirror leather can show better reflective performance "shining" under sunlight, and its surface is abnormally smooth, so it can show the style of a mirror. It is "mirror leather". Ordinary wet-process PU leather needs to be kneaded, and the surface will be uneven, which will affect the refraction of light, so it does not have the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C08G18/76C08G18/66C08G18/42C08G18/10C08G18/32
CPCC09J175/06C08G18/7642C08G18/4238C08G18/10C08G18/3206C08G18/3228C08G18/3281
Inventor 王元有贾生超王雯高二险王元帅
Owner YANGZHOU POLYTECHNIC INST
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