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Water-base coating material

一种水性涂层、试剂的技术，应用在涂层、胶粘剂、粘合剂类型等方向，能够解决难均匀膜、差成膜性质等问题

Active Publication Date: 2006-05-31
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When applied to off-line coating methods at lower processing temperatures, aqueous dispersions have poor film-forming properties, making it difficult to obtain uniform films without coating film defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0107] The method for preparing the aqueous dispersion (C) used in the present invention is now described by dispersing resin particles containing the water-dispersible polyurethane resin (A) and the hydrophobic polyol (B) in prepared in water.

[0108] Such an aqueous dispersion (C) can be prepared using various conventionally known methods, for example, a combination of the following methods (i) and (ii). (i) uniformly mix the water-dispersible polyurethane resin (A) and the hydrophobic polyol (B), then neutralize the mixture, and then add water to the mixture, thereby emulsifying and dispersing the mixture, and optionally Distillation is performed so that an aqueous dispersion (C) can be obtained. (ii) Polyester polyol (a-1) and optional other polyols and polyisocyanate are (1~3): 1, preferably (1~2): 1 in the equivalent ratio of isocyanate group and hydroxyl group The reaction is carried out in an organic aprotic solvent, the reaction is carried out at a temperature rang...

Embodiment 1

[0194] 1000 parts of polyester polyol P-1 was dehydrated at 100° C. under reduced pressure, cooled to 80° C., and then dissolved in 907 parts of methyl ethyl ketone while fully stirring. After adding 80 parts of 2,2'-dimethylolpropionic acid and 281 parts of isophorone diisocyanate, the reaction was carried out at 75°C for 8 hours, and a carbamation step was carried out.

[0195] After confirming that the isocyanate value became 0.1% or less and cooling to 50°C, 340 parts of polyester polyol Q-1 was added to form a homogeneous solution. The solution was neutralized with 60 parts of triethylamine, and then water-dispersed by adding 7000 parts of water.

[0196] After removing methyl ethyl ketone under reduced pressure at 40-60° C., the obtained transparent reaction product was added with water to adjust the concentration to obtain a stable transparent colloidal aqueous dispersion with a non-volatile matter content of 20%.

[0197] After using the resulting aqueous dispersion, ...

Embodiment 2

[0199] As shown in Table 3-1, except that 340 parts of polyether polyol H is used instead of polyester polyol Q-1 in Example 1, the same operation as in Example 1 is carried out to obtain a non-volatile content of 20%. Stable clear colloidal aqueous dispersion.

[0200] Using the obtained aqueous dispersion, aqueous coating agents A and B were prepared in the same manner as above, and various evaluations were performed. As a result, as shown in Table 3-1, the obtained aqueous coating agent had excellent physical properties.

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Abstract

A water-based coating agent, comprising: an aqueous dispersion (C), which is obtained by mixing a water-dispersible polyurethane resin (A) and at least one selected from the group consisting of hydrophobic polyester polyol (B-1) and hydrophobic polyether Polyol (B-2) resin particles dispersed in water; and a crosslinking agent (D) capable of reacting with hydroxyl groups, the water dispersible polyurethane resin (A) by making polyester polyol (a-1) It is obtained by reacting with polyisocyanate, and based on the weight of the water-dispersible polyurethane resin (A), the water-dispersible polyurethane resin (A) also contains 15 to 35% by weight of aromatic ring structural units, and the poly The ester polyol (a-1) is obtained by condensing a dicarboxylic acid containing an aromatic dicarboxylic acid as a main component with a polyol, and wherein the hydrophobic polyester polyol (B-1) and / or Or the hydrophobic polyether polyol (B-2) is liquid at normal temperature and contains 20 to 50% by weight of aromatic ring structural units.

Description

technical field [0001] The present invention relates to aqueous coating agents. More specifically, the present invention relates to an aqueous coating agent that can be used as a method for modifying the surface of plastic films made of polyester resins, polypropylene resins, and polyamide resins, thereby forming the surface with excellent adhesion ; fixed coating agent, which can be used in the preparation of aluminum-deposited plastic films for the purpose of improving the adhesion of aluminum-deposited layers of aluminum-deposited plastic films; coating compositions, inks; and for fibers and leather surface treatment reagents. [0002] This application claims priority from Japanese Patent Application No. 2003-150608 filed May 28, 2003, the disclosure of which is incorporated herein by reference. Background technique [0003] Biaxially oriented polyester films (for example, polyethylene terephthalate films commonly referred to as PET films) are used in insulating materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08G18/08C08G18/42C08G18/48C08G18/66C08G18/75C08J7/043C08J7/046C08J7/048C08J7/16C09D175/04C09D175/06C09J175/04
CPCC08G18/0823C08G18/4263C08G18/6659C08G18/758C08J2475/00C09D175/06C08J7/0427C08J7/048C08J7/043C08J7/046C09D175/04C08L75/04
Inventor 北田满久场一生玉木淑文
Owner DIC CORP
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