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Waterborne polyurethane leather coating agent with biological stain and damage prevention function

A water-based polyurethane and leather finishing agent technology, which is applied in polyurea/polyurethane coatings, antifouling/underwater coatings, leather surface treatment, etc., and can solve the problems of poor water resistance of polyurethane films

Active Publication Date: 2017-09-22
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent (2012105009239.2 Patent No.) reports that N,N-dimethylaminoethyl methacrylate with antifouling factor is introduced into polyurethane leather finishing agent, although it has anti-biofouling performance, but this antifouling factor Strong hydrophilicity, which makes the polyurethane film not water-resistant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Preparation of isobornyl molecular chain extender containing dihydroxy; the specific operation method is as follows: add 15.61 g of isobornyl acrylate, 2.16 g of 1-thio-2,3-propanediol and 0.3290 g of Photocatalyst 2-hydroxy-2-methylpropiophenone, 65 mL tetrahydrofuran; put nitrogen into the weighing bottle for 20 min, seal it, stir it with a magnetic stirrer for 5 min, then put the weighing bottle into the ultraviolet radiation box, React for 2 h under the irradiation of ultraviolet light, remove most of the solvent by rotary evaporation, and then precipitate the concentrated reaction product in water twice, 4 h each time, pour off most of the water, and dry in vacuum for 24 h to obtain The isoborneol molecular chain extender;

[0021] After adding 20 g of polytetrahydrofuran ether (Mn=2000), 13.345 g of diphenylmethane diisocyanate and 350 ml of tetrahydrofuran solvent into a 500 mL three-neck flask, mechanically stirred under nitrogen protection, 60 o C f...

Embodiment 2

[0022] Example 2: Preparation of isobornyl molecular chain extender containing dihydroxy; the specific operation method is as follows: add 16.87 g of isobornyl acrylate, 2.16 g of 1-thio-2,3-propanediol and 0.1290 g of Photocatalyst 2-hydroxy-2-methylpropiophenone, 70 mL tetrahydrofuran; nitrogen was introduced into the weighing bottle for 20 min, sealed, stirred with a magnetic stirrer for 5 min, and then the weighing bottle was placed in an ultraviolet irradiation box. React for 2 h under the irradiation of ultraviolet light, remove most of the solvent by rotary evaporation, and then precipitate the concentrated reaction product in water twice, 4 h each time, pour off most of the water, and dry in vacuum for 24 h to obtain The isoborneol molecular chain extender;

[0023] After adding 20 g of polycarbonate diol (Mn=1000), 13 g of isophorone diisocyanate and 350 ml of tetrahydrofuran solvent into a 500 mL three-neck flask, mechanically stirred under nitrogen protection, 60 o...

Embodiment 3

[0024] Example 3: Preparation of isobornyl molecular chain extender containing dihydroxy; the specific operation method is as follows: add 10.40 g of isobornyl acrylate, 1.08 g of 1-thio-2,3-propanediol and 0.2342 g of Photocatalyst 2-hydroxy-2-methylpropiophenone, 60 mL tetrahydrofuran; put nitrogen into the weighing bottle for 20 min, seal it, stir it with a magnetic stirrer for 5 min, then put the weighing bottle into the ultraviolet radiation box, React for 2 h under the irradiation of ultraviolet light, remove most of the solvent by rotary evaporation, and then precipitate the concentrated reaction product in water twice, 4 h each time, pour off most of the water, and dry in vacuum for 24 h to obtain The isoborneol molecular chain extender;

[0025] After adding 20 g of polytetrahydrofuran ether (Mn=2000), 9.285 g of hexamethylene diisocyanate and 350 ml of tetrahydrofuran solvent into a 500 mL three-neck flask, mechanically stirred under nitrogen protection, 60 o C for ...

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PUM

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Abstract

The invention discloses a waterborne polyurethane leather coating agent with a biological stain and damage prevention function. According to a preparation method, firstly, through sulfydryl-double-bond clicking reaction, isoborneol monomers containing di-hydroxyls are synthesized; then, through the addition polymerization reaction, the isoborneol monomers are introduced into the polyurethane main chains; further, through the chain expansion reaction and the neutralization reaction, the waterborne polyurethane leather coating agent with the biological stain and damage prevention function is obtained. The isoborneol monomers have good biological stain and damage prevention performance; when the molecular weight is greater, the biological stain and damage prevention performance is better. Through the generation of addition polymerization reaction by diisocyanate and di-hydroxyls in the structure, the waterborne polyurethane leather coating agent can be introduced onto the polyurethane main chain in the molecule level. Good water-resistant performance and film forming performance of the polyurethane leather coating agent are maintained; meanwhile, the durable biological stain and damage prevention performance is realized.

Description

technical field [0001] The invention relates to the field of research on anti-biofouling materials and the field of development of water-based polyurethane leather finishing agents, in particular to an anti-biological fouling water-based polyurethane leather finishing agent. Background technique [0002] Polyurethane (polyurethane, PU) is a general term for polymer materials with repeating urethane (-NHCOO-) characteristic groups. The full name is polyurethane, which is generally composed of polyglycol (polyether, polyester) It is formed by the reaction of polyisocyanate and small molecule chain extender (diamine, diol). It is a block copolymer in which soft segments and hard segments are alternately formed. The soft segment is composed of polyglycol, and the hard segment is composed of polyisocyanate and chain extender. Due to the thermodynamic incompatibility between the soft segment and the hard segment, there is phase separation between the polyurethane segments, and A ...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D5/16C08G18/66C08G18/48C08G18/34C08G18/32C08G18/38C08G18/12C14C11/00
Inventor 林炜吴尖辉王春华
Owner SICHUAN UNIV
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