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Curing agent for two-package polyurethane resin coating material, method for producing same, and two-package polyurethane resin coating material

A technology of polyurethane resin and manufacturing method, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve problems such as deterioration of solvent resistance, and achieve the effect of improving deterioration of solvent resistance and excellent balance

Active Publication Date: 2011-09-07
NIPPON POLYURETHANE IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a hardener for a two-component polyurethane resin coating, a method for producing the same, and a two-component polyurethane resin coating that can effectively improve the problem of deterioration of solvent resistance.

Method used

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  • Curing agent for two-package polyurethane resin coating material, method for producing same, and two-package polyurethane resin coating material
  • Curing agent for two-package polyurethane resin coating material, method for producing same, and two-package polyurethane resin coating material
  • Curing agent for two-package polyurethane resin coating material, method for producing same, and two-package polyurethane resin coating material

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Embodiment

[0069] The present invention will be further described by giving examples and comparative examples. However, the present invention is not limited to the Examples described below. In addition, in the following description, the unit (ppm, %) of each component amount is a mass basis.

Synthetic example 1

[0070] (Polyisocyanate Synthesis Example 1: Isocyanate 1 (isocyanate group-containing isocyanate))

[0071] In a 1000ml glass four-necked flask with a cover equipped with a thermometer, a stirrer and a nitrogen inlet tube, 936g of hexamethylene diisocyanate (hereinafter referred to as HDI) and 6g of 1,3-butanediol are charged, and after nitrogen purging, The temperature was raised to 50°C while stirring, and 0.1 g of phenol and 0.04 g of a catalyst (a mixture of potassium isobutyrate:dipropylene glycol:THF=1:4.5:4.5) were added. The reaction was carried out at 110° C. and sampling was carried out. When the NCO content reached 41.5%, 0.004 g of N-cyclohexylaminosulfonic acid and 0.015 g of 2-ethylhexyl phosphate were added to stop the reaction. Then, under the conditions of 130° C. and 0.04 kPa, thin film distillation was performed to remove free HDI.

[0072] The isocyanate 1 thus obtained was a pale yellow liquid with an average number of functional groups of 3.5, an NCO con...

Synthetic example 2

[0073] (Polyisocyanate Synthesis Example 2: Isocyanate 2 (isocyanate group-containing isocyanate))

[0074] 961g of HDI and 3.5g of 1,3-butanediol were placed in a 1000ml four-necked glass flask with a cover equipped with a thermometer, a stirrer, and a nitrogen inlet tube, and after purging with nitrogen, the temperature was raised to 50°C while stirring. 0.1 g of phenol and 0.06 g of a catalyst (a mixture of potassium isobutyrate:dipropylethanol:THF=1:4.5:4.5) were added. The reaction was carried out at 110° C. and sampling was carried out. When the NCO content reached 35.0%, 0.007 g of N-cyclohexylaminosulfonic acid and 0.011 g of 2-ethylhexyl phosphate were added to stop the reaction. Then, under the conditions of 130° C. and 0.04 kPa, thin film distillation was performed to remove free HDI.

[0075] The isocyanate 2 thus obtained was a pale yellow liquid with an average number of functional groups of 4.5, an NCO content of 20.0%, and a viscosity of 8000 (mPa·s at 25° C.)...

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Abstract

Disclosed is a curing agent for two-package polyurethane resin coating materials, which can effectively improve the problem of deterioration in solvent resistance. Also disclosed are a method for producing the curing agent for two-package polyurethane resin coating materials, and a two-package polyurethane resin coating material. The curing agent for two-package polyurethane resin coating materials contains, as a main component, a modified polyisocyanate which is obtained by modifying a polyisocyanate with a modifying agent which has a functional group that exerts a catalytic action in a reaction with a base material containing a hydroxyl group and an active hydrogen. Preferably, the polyisocyanate includes one or both of an isocyanurate group and an allophanate group, or is composed of an aliphatic polyisocyanate or an alicyclic polyisocyanate. The modifying agent is composed of an organic non-metal compound, and the base material is composed of an acrylic resin. The two-package polyurethane resin coating material is composed of a curing agent for two-package resin coating materials and a base material containing an active hydrogen.

Description

technical field [0001] The present invention relates to a two-component polyurethane resin paint using polyisocyanate as a hardener. Background technique [0002] The two-component polyurethane resin coating that uses various resin components such as polyols as the main ingredient (resin) and polyisocyanate as the hardening agent can be dried at room temperature, has a good appearance and excellent coating film strength, and can form a good coating. Acid-resistant coating film, so it is used in various fields of construction, civil engineering and vehicles. [0003] When using two-component polyurethane resin paint for finishing, a catalyst is added to the above-mentioned two components in order to promote hardening and drying. In addition, at this time, a catalyst is also added in advance to either one of the two liquids. [0004] As such a catalyst, for example, a tertiary amine such as dibutyltin dilaurate as an organometallic compound or triethyleneamine as an organome...

Claims

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Application Information

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IPC IPC(8): C09D175/04C08G18/62C08G18/72C09D133/00
CPCC08G18/222C08G18/225C08G18/092C08G18/7837C08G18/792C08G18/8064C08G18/022C09D175/14C08G18/6225
Inventor 长冈毅森川幸弘
Owner NIPPON POLYURETHANE IND CO LTD
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