Wet-type high-peel-strength polyurethane resin and preparation method thereof

A polyurethane resin, high peeling technology, applied in textiles and papermaking, etc., can solve the problems of peeling strength limitation, insufficient bonding force of polyurethane resin and base fabric, etc., achieve the effect of reducing soft segment crystallization, reducing cohesion, and improving peeling strength

Active Publication Date: 2020-01-17
HEFEI ANLI POLYURETHANE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of the limitation of the strength of the molecular chain itself caused by the soft and hard block structure of the wet high-peeling polyurethane, and the limitation of the peeling strength due to the insufficient bonding force between the polyurethane resin and the base cloth, the present invention provides a kind of molecular chain with higher strength. High, wet type high peel strength polyurethane resin with better bonding strength with base cloth and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) 400g polyol compound PET-4, 200g polyol compound PET-2T and 3g antioxidant I-1010 are added in 550g solvent DMF;

[0049] (2) Stir the solution in (1) evenly, add 75g of diisocyanate, and react at 75°C for 1h in the presence of 0.8g of catalyst organic bismuth Mb20;

[0050] (3) Add about 10 g of diisocyanate to (2), and perform a prepolymerization reaction at 75° C. for 2 hours to obtain a prepolymer;

[0051] (4) Add 1800g of solvent DMF, 70g of ethylene glycol, and 240g of diisocyanate to the prepolymer. After stirring evenly, continue to react at 75°C for 5h; after the reaction is completed, add reaction terminator methanol to control its viscosity at 200-300Pas / 25°C to obtain polyurethane resin.

Embodiment 2

[0053] (1) 400g polyol compound PET-4, 100g polyol compound PET-2, 100g polyol compound PET-2T and 3g antioxidant I-1010 are added in 550g solvent DMF;

[0054](2) Stir the solution in (1) evenly, add 75g of diisocyanate, and react at 75°C for 1h in the presence of 0.8g of catalyst organic bismuth Mb20;

[0055] (3) Add about 10 g of diisocyanate to (2), and perform a prepolymerization reaction at 75° C. for 2 hours to obtain a prepolymer;

[0056] (4) Add 1800g of solvent DMF, 70g of ethylene glycol, and 240g of diisocyanate to the prepolymer. After stirring evenly, continue to react at 75°C for 5h; after the reaction is completed, add reaction terminator methanol to control its viscosity at 200-300Pas / 25°C to obtain polyurethane resin.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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PUM

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Abstract

The invention discloses a wet-type high-peel-strength polyurethane resin and a preparation method thereof. According to the invention, a special polyester polyol is adopted; the difference of the special polyester polyol from the common adipic acid series polyester in that the polyester polyol has a soft segment structure, the flexibility of the soft segment part in the molecular chain is reducedand the rigidity is increased due to the rigid chain segment with a benzene ring in the polyester polyol, so that the polyurethane resin has excellent peel strength; the terephthalic acid dihydric diol structure of the polyester is similar to the molecular structure of the polyester cloth, so that the resin can be well combined with a cloth base during tanning; and based on the low flexibility ofthe terephthalic acid chain segment, the crystallization of the soft segment is reduced, so that the phase separation of the soft segment and the hard segment is reduced, the cohesion is reduced, thecurling degree during leather surface drying is reduced, and the leather surface flatness is improved.

Description

technical field [0001] The invention relates to the technical field of polyurethane synthetic leather, in particular to a wet-type high-peeling-strength polyurethane resin and a preparation method thereof. Background technique [0002] Wet-process polyurethane synthetic leather is the best substitute product for the new generation of natural leather. It has excellent properties, such as good air permeability, moisture permeability, smooth and plump feel and excellent mechanical strength, especially from the structure similar to natural leather. , so its products are widely used in clothing, shoes, bags, car cushions, sofas and other fields. [0003] Among them, high-stripping polyurethane synthetic leather is very popular in the sports shoe market, and has gradually replaced genuine leather to process sports shoes. Higher peel strength means that it can remain intact under harsher physical and mechanical impacts, so the pursuit of higher peel strength has always been a mark...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/42C08G18/32C08G18/12C08K5/134D06N3/14
CPCC08G18/12C08G18/3206C08G18/4202C08G18/664C08K5/1345D06N3/146
Inventor 姚克俭季明洋武春余张彪葛礼响王中睿
Owner HEFEI ANLI POLYURETHANE NEW MATERIAL
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