Waterborne polyurethane resin dispersion and use thereof

A water-based polyurethane and polyurethane resin technology, applied in polyurea/polyurethane coatings, coatings, latex paints, etc., can solve the problems of insufficient solvent resistance and water resistance of the coating film, which cannot be said to be sufficient, and achieve water resistance and Excellent solvent resistance, excellent adhesion, and high fracture energy

Inactive Publication Date: 2013-10-09
UBE IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aqueous polyurethane resin dispersions using polycarbonate polyols exhibit good properties as described above, but they cannot be said to be sufficient compared to solvent-based polyurethanes.
In particular, the solvent resistance and water resistance of the coating film are not sufficient

Method used

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  • Waterborne polyurethane resin dispersion and use thereof
  • Waterborne polyurethane resin dispersion and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0147] [Manufacture of water-based polyurethane resin dispersion (1)]

[0148]Add ETERNACOLL UH-200 (registered trademark; polycarbonate diol produced by Ube Industries; number average molecular weight 1961; hydroxyl value 57.2mgKOH / g; make 1,6-hexanediol and dimethyl carbonate reaction polycarbonate diol) 178g, ETERNACOLL UH-100 (registered trademark; polycarbonate diol produced by Ube Industries; number average molecular weight 1004; hydroxyl value 111.8mgKOH / g; polycarbonate diol obtained by reacting 1,6-hexanediol and dimethyl carbonate) 51.6g, polypropylene glycol (PPG-1000; number average molecular weight 1000) 25.3g, 2,2-dimethylol Propionic acid (DMPA) 15.6g and N-methylpyrrolidone (NMP) 130g. Thereafter, it was heated and stirred at 60° C., and it was confirmed that DMPA was dissolved. 128 g of 4,4'-dicyclohexylmethane diisocyanate (hydrogenated MDI) and 0.33 g of dibutyltin dilaurate (catalyst) were added, heated to 90°C, and urethanization reaction was performed ...

Embodiment 2

[0152] [Manufacture of water-based polyurethane resin dispersion (2)]

[0153] Add ETERNACOLL UH-200 (registered trademark; polycarbonate diol produced by Ube Industries, Ltd.; number average molecular weight 1961; hydroxyl value 57.2 mgKOH / g; make 1,6-hexane Polycarbonate diol obtained by the reaction of diol and dimethyl carbonate) 180g, ETERNACOLL UH-100 (registered trademark; polycarbonate diol produced by Ube Industries; number average molecular weight 1004; hydroxyl value 111.8mgKOH / g; make 1 , 6-hexanediol and dimethyl carbonate reaction polycarbonate diol) 52.9g, polypropylene glycol (PPG-1000; number average molecular weight 1000) 26.3g, 2,2-dimethylolpropionic acid (DMPA ) 13.3g and N-methylpyrrolidone (NMP) 129g. Thereafter, it was heated and stirred at 60° C., and it was confirmed that DMPA was dissolved. 123 g of 4,4'-dicyclohexylmethane diisocyanate (hydrogenated MDI) and 0.33 g of dibutyltin dilaurate (catalyst) were added, heated to 90°C, and urethanization r...

Embodiment 3

[0157] [Manufacture of water-based polyurethane resin dispersion (3)]

[0158] Add ETERNACOLL UH-200 (registered trademark; polycarbonate diol produced by Ube Industries; number average molecular weight 1982; hydroxyl value 56.6 mgKOH / g; make 1,6-hexane Polycarbonate diol obtained by the reaction of diol and dimethyl carbonate) 190g, ETERNACOLL UH-100 (registered trademark; polycarbonate diol produced by Ube Industries; number average molecular weight 1004; hydroxyl value 111.8mgKOH / g; make 1 , 6-hexanediol and dimethyl carbonate reaction polycarbonate diol) 54.6g, polypropylene glycol (PPG-1000; number average molecular weight 1000) 27.2g, 2,2-dimethylolpropionic acid (DMPA ) 11.7g and N-methylpyrrolidone (NMP) 133.3g. Thereafter, it was heated and stirred at 60° C., and it was confirmed that DMPA was dissolved. 120 g of 4,4'-dicyclohexylmethane diisocyanate (hydrogenated MDI) and 0.33 g of dibutyltin dilaurate (catalyst) were added, heated to 90°C, and urethanization react...

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Abstract

An aqueous polyurethane resin dispersion is a dispersion of a polyurethane resin in an aqueous medium, the polyurethane resin being obtained by reacting (A) a polyurethane prepolymer obtained by reacting (a) a polyisocyanate compound, (b) a polyol compound including a polycarbonate polyol with a number average molecular weight of 400 to 3000, (c) an acidic group-containing polyol compound and (d) a blocking agent, with (B) a chain extender, the total content of urethane bonds and urea bonds being 7 to 15 wt %, the content of carbonate bonds being 15 to 40 wt %, the content of ether bonds being 0.5 to 5 wt %, the content of isocyanate groups bonded to the blocking agent being 0.2 to 2.0 wt %, each of these contents being based on solid contents, the acid value being 10 to 16 mg KOH / g. The aqueous polyurethane resin dispersion can form coating films which permit new application while exhibiting excellent water resistance and solvent resistance. A coating composition includes the dispersion. A polyurethane resin film is obtained by thermally drying a composition including the dispersion.

Description

technical field [0001] The present invention relates to an aqueous polyurethane resin dispersion in which a polyurethane resin is dispersed in an aqueous medium. Moreover, this invention relates to the coating composition containing the said aqueous polyurethane resin dispersion, and the polyurethane resin film obtained by heat-drying the composition containing the said polyurethane resin dispersion. Background technique [0002] Water-based polyurethane resin dispersion can form a coating film with adhesiveness, abrasion resistance, and rubber properties. Compared with conventional solvent-based polyurethanes, it is an environmentally friendly material that can reduce volatile organic compounds, so it is gradually replacing solvent-based polyurethanes. [0003] Polycarbonate polyol is a useful compound as a raw material for polyurethane resins, and can be used in rigid foams, flexible foams, paints, adhesives, synthetic leather, ink binders, etc. by reacting with isocyanate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/65C08G18/80C09D5/02C09D175/04
CPCC08G18/0823C08G18/6659C08G18/10C09D175/06C08G18/28C08G18/65C08G18/80C08J3/03C08L75/04C09D5/02C09D175/04
Inventor 森上敦史内贵昌弘足立文夫高桥学
Owner UBE IND LTD
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