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Aqueous polyurethane resin dispersion, manufacturing method for same, and paint composition containing same

A technology of water-based polyurethane and polyurethane prepolymer, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of reduced storage stability, water-based polyurethane resin dispersion dispersibility and film-forming properties, and achieve stability Good, good film-forming properties, high practical effect

Active Publication Date: 2011-06-08
UBE IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, introduction of a cross-linked structure into the polyurethane resin tends to lower the dispersibility and film-forming properties of the aqueous polyurethane resin dispersion, and the addition of a cross-linking material tends to lower the storage stability.

Method used

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  • Aqueous polyurethane resin dispersion, manufacturing method for same, and paint composition containing same
  • Aqueous polyurethane resin dispersion, manufacturing method for same, and paint composition containing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] [Manufacture of water-based polyurethane resin dispersion (1)]

[0117]In a reaction vessel with a stirrer, a reflux condenser and a thermometer inserted, add ETERNACOLL UM90 (3 / 1) (polycarbonate diol manufactured by Ube Industries, Ltd.; number average molecular weight: 916; hydroxyl value: 122.5mgKOH) under nitrogen flow / g; polycarbonate diol obtained by reacting a polyol mixture with a molar ratio of 1,4-cyclohexanedimethanol:1,6-hexanediol=3:1 as a polyol component and carbonate) 1500g, 220g of 2,2-dimethylolpropionic acid (DMPA), and 1347g of N-methylpyrrolidone (NMP). It was then heated to 60°C to confirm the dissolution of DMPA. Add 4,4'-dicyclohexylmethane diisocyanate (hydrogenated MDI) 1445g, dibutyltin dilaurate (catalyst) 2.6g and heat to 90 ℃, carry out polyurethane reaction with 5 hours, obtain polyurethane prepolymer (at this time The carboxylic acid group content in the prepolymer was 2.38% by weight based on solid content). The NCO group content in ...

Embodiment 2

[0121] [Manufacture of water-based polyurethane resin dispersion (2)]

[0122] In the same reaction vessel as in Example 1, ETERNACOLLUM90 (3 / 1) (polycarbonate diol manufactured by Ube Industries, Ltd.; number average molecular weight 916; hydroxyl value 122.5 mgKOH / g; made as di 1,4-cyclohexanedimethanol:1,6-hexanediol=3:1 molar ratio polyol mixture and polycarbonate diol obtained by reacting polycarbonate diol) of alcohol component) 1267g, 1,4- 43.5 g of butanediol, 250 g of 2,2-dimethylolpropionic acid (DMPA), and 1368 g of N-methylpyrrolidone (NMP). It was then heated to 60°C to confirm the dissolution of DMPA. Add 4,4'-dicyclohexylmethane diisocyanate (hydrogenated MDI) 1640g, dibutyltin dilaurate (catalyst) 2.6g and heat to 90 ℃, carry out polyurethane reaction with 5 hours, obtain polyurethane prepolymer (at this time The carboxylic acid group content in the prepolymer was 2.66% by weight based on solid content). The NCO group content at the completion of the urethan...

Embodiment 3

[0126] [Manufacture of water-based polyurethane resin dispersion (3)]

[0127] In the same reaction vessel as in Example 1, ETERNACOLLUM90 (3 / 1) (polycarbonate diol manufactured by Ube Industries, Ltd.; number average molecular weight 916; hydroxyl value 122.5 mgKOH / g; made as di 1,4-cyclohexanedimethanol: 1,6-hexanediol=3:1 molar ratio polyol mixture and polycarbonate diol obtained by reaction of the alcohol component) 150 g, 1,4- 7.46 g of butanediol, 39.9 g of 2,2-dimethylolpropionic acid (DMPA), and 186 g of N-methylpyrrolidone (NMP). It was then heated to 60°C to confirm the dissolution of DMPA. Add 239 g of 4,4'-dicyclohexylmethane diisocyanate (hydrogenated MDI), 0.35 g of dibutyltin dilaurate (catalyst) and heat to 90° C., and carry out polyurethane reaction with 5 hours to obtain a polyurethane prepolymer (at this time The carboxylic acid group content in the prepolymer was 3.10% by weight based on solid content). The NCO group content at the completion of the uret...

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Abstract

Disclosed is an aqueous polyurethane dispersion with superior wear resistance as a coating film. Provided is an aqueous polyurethane resin dispersion in which a polyurethane resin, which is obtained by reacting a polyurethane polymer (A)-which is obtained by reacting (a) a polyisocyanate compound, (b) a polyol compound containing a polycarbonate polyol with an alicyclic structure, and (c) an acidic-group-containing polyol compound-with a chain extender (B) that is reactive with the isocyanate group in the polyurethane polymer (A), is dispersed in a water-based vehicle, wherein the alicyclic structure content is 26.0 to 60.0% by weight based on the solids content, and the total of the urethane bond content and urea bond content is 17.7 to 30.0% by weight based on the solids content.

Description

technical field [0001] The present invention relates to an aqueous polyurethane resin dispersion obtained by dispersing a polyurethane resin obtained from polycarbonate polyol in an aqueous medium, its production method, and a coating composition containing the dispersion. Background technique [0002] As a material, water-based polyurethane resin dispersion can obtain a coating film with adhesiveness, abrasion resistance, and rubber properties, and can reduce volatile organic compounds compared with existing solvent-based polyurethanes. Therefore, it is being used as an environment-friendly material. Gradually replace solvent-based polyurethane. On the other hand, polycarbonate polyols are raw materials for producing durable polyurethane resins used in rigid foams, flexible foams, paints, adhesives, synthetic leather, ink adhesives, etc. by reacting with isocyanate compounds useful compounds. Polyurethane resins using polycarbonate polyols are characterized by high cohesi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/12C08G18/00C08G18/44
CPCC08G18/6659C08G18/758C09D175/06C08G18/0823C08G18/12C08G18/44C08G18/3228
Inventor 中村卓内贵昌弘森上敦史足立文夫高桥学藤井辉昭
Owner UBE IND LTD
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