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High hydrolysis resistance and weatherability leather imitation resin for synthetic leather and preparation method thereof

A manufacturing method and a hydrolysis-resistant technology, applied in the field of manufacturing this resin, can solve the problems of poor weather resistance and heat resistance, poor hydrolysis resistance of adipic acid polyester, etc., and achieve stable and reliable quality, high hydrolysis resistance, and weather resistance. The effect of mechanical properties

Inactive Publication Date: 2011-10-05
宜兴市新光化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing hydrolysis-resistant resins on the market use PTMEG (polytetrahydrofuran ether) diol and adipate polyester as basic materials. Among them, PTMEG has poor weather resistance and heat resistance, and adipic acid polyester has poor hydrolysis resistance. There is no imitation leather resin for synthetic leather that not only has high hydrolysis resistance, but also has high weather resistance and good mechanical properties.

Method used

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  • High hydrolysis resistance and weatherability leather imitation resin for synthetic leather and preparation method thereof
  • High hydrolysis resistance and weatherability leather imitation resin for synthetic leather and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1, in 75 parts of PCL-220CPB with a molecular weight of 2000 and 25 parts of isocyanate MDI, use a small amount of phosphoric acid to adjust the pH value to 4.8, raise the temperature to 75°C for 1.2 hours, cool down to 55°C and add 60 parts of DMF for dilution. Put in 0.03 parts of organic bismuth catalyst, put in 3 parts of chain extender MEG in three batches, put in 1.5 parts of MEG in the first batch, put in 0.7 parts of MEG in the second batch, put in 50 parts of DMF, put in the remaining MEG in the third batch, and react During the process, the viscosity continued to rise, and 90 parts of solvent DMF was added. When the measured viscosity reached 80,000 CP.S, 0.4 parts of methanol, the termination reaction agent, was added, and the temperature was raised to 60°C for 1 hour to keep the temperature and react for 1 hour before discharging and packaging.

Embodiment 2

[0016] Example 2, in 60 parts of PCL-220CPB with a molecular weight of 2000 and 40 parts of isocyanate MDI, use a small amount of phosphoric acid to adjust the pH value to 5.1, raise the temperature to 80°C for 1 hour, drop the temperature to 50°C and put in 50 parts of DMF for dilution, and put in Catalyst 0.02 parts of dibutyltin dilaurate, 6 parts of chain extender in four batches, 1.4 butanediol 2.8 parts in the first batch, 1.4 butanediol 1.6 parts in the second batch, 100 parts of solvent DMF, the third batch Put in 1.4 butanediol 0.64 parts of chain extender, put in 60 parts of solvent DMF, put in the remaining 1.4 butanediol in the fourth batch, put in 65 parts of solvent DMF, the measured viscosity has reached 100,000 CP.S, put in 0.5 part of terminating reaction agent methanol to terminate To react, heat up to 65°C and keep it warm for 0.5 hour to react and pack.

Embodiment 3

[0017] Example 3, in 85 parts of PCL-220CPB with a molecular weight of 2000 and 15 parts of isocyanate MDI, adjust the pH value to 4.6 with an appropriate amount of phosphoric acid, raise the temperature to 75°C and react for 1.5 hours, cool down to 52°C and put in 40 parts of DMF for dilution. Catalyst 0.05 parts of dibutyltin dilaurate, put 5 parts of chain extender in four batches, put 2.5 parts of chain extender MEG in the first batch, put 1.25 parts of chain extender MEG in the second batch, put in 110 parts of solvent DMF, and put in the third batch Put in 0.5 part of chain extender MEG in batches, put in 50 parts of solvent DMF, put in the remaining MEG in the fourth batch, put in 100 parts of solvent DMF, the measured viscosity has reached 120,000 CP. 70°C heat preservation reaction for 0.8 hours, then discharge and pack.

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Abstract

A synthesized leather simulated resin with high hydrolysis resistance and weatherability, which is obtained by using polyglycol caprolactone of polyester type as key material, which is polymerized with isocyanate, then carrying out chain extending reaction under catalysis. The resin has high hydrolysis resistance, high weatherability and great mechanical property, wherein the hydrolysis resistance makes it can be used outdoor for 5-10 years with temperature between 38-40 DEG C., while can be used for over 3 years if it is dipped in 5% hydroxide solution, so the resin has a stable and reliablequality.

Description

technical field [0001] The invention relates to an imitation leather resin for synthetic leather, in particular to an imitation leather resin for leather with high hydrolysis resistance and high weather resistance, and provides a method for manufacturing the resin. Background technique [0002] The existing hydrolysis-resistant resins on the market use PTMEG (polytetrahydrofuran ether) diol and adipate polyester as basic materials. Among them, PTMEG has poor weather resistance and heat resistance, and adipic acid polyester has poor hydrolysis resistance. There is no imitation leather resin for synthetic leather that not only has high hydrolysis resistance, but also has high weather resistance and good mechanical properties. Contents of the invention [0003] The invention is precisely to overcome the above-mentioned deficiencies and provide a synthetic leather imitation leather resin with high hydrolysis resistance and high weather resistance. As a base resin, it is prepo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/42C08G18/10C08G18/08D06N3/12
Inventor 芮小平芮新平唐永新
Owner 宜兴市新光化工有限公司
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