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Waterborne acetoacetate-functionalized alkyd coating

A technology of acetoacetate and acetoacetate, applied in the field of water-based coating compositions, can solve problems such as insufficient curing and consumption

Inactive Publication Date: 2005-08-24
EASTMAN CHEM CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, a portion of the acetoacetate groups may be consumed during free radical polymerization due to the reaction between the acetoacetate functional group and the free radicals
This may in turn lead to insufficient curing during film formation

Method used

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  • Waterborne acetoacetate-functionalized alkyd coating
  • Waterborne acetoacetate-functionalized alkyd coating
  • Waterborne acetoacetate-functionalized alkyd coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Embodiment 1: the preparation of water-based alkyd resin 1

[0063] The NPG / SIP addition was first prepared by reacting the following components in a three-necked round bottom flask equipped with a mechanical stirrer, water vapor-jacketed partial condenser, Dean-Stark trap, nitrogen inlet, and water condenser Compounds: neopentyl glycol (NPG) (827 grams, 7.95 moles), 5-sodiumsulfoisophthalic acid (SIP) (536 grams, 2.00 moles), water (91.9 g) and acid catalyst FASCAT4100 (1.10 g) . The reaction temperature was gradually increased from 110 to 150°C over a period of 45 minutes and the distillate was collected in a Dean-Stark trap. The reaction was allowed to continue for 3 hours at 150-180°C and 4.5 hours at 190°C until an acid number of 3.0 mgKOH / g was reached. A part of the obtained product was used in the following steps.

[0064] Into a separate reactor equipped with the same configuration as above were charged neopentyl glycol (NPG) (48.4 g, 0.47 mol), the above NP...

Embodiment 2

[0066] Preparation of acetoacetate-functionalized alkyd resin 1

[0067] Into a three necked round bottom flask equipped with a mechanical stirrer, steam-jacketed partial condenser, Dean-Stark trap, water condenser and nitrogen inlet was charged the alkyd resin of Example 1 (150 g) and acetyl tert-Butyl acetate (t-BAA) (16.7 g, 0.105 mol). The reaction mixture was stirred at 100°C for 30 minutes, then at 110°C for 1.5 hours while collecting distillate in a Dean-Stark trap. The reaction was continued at 120°C for 1 hr, at 130°C for 30 min, and at 140°C for 30 min, during which time a total of 7 ml of distillate was collected. The mixture was then cooled and the resulting resin collected.

Embodiment 3

[0069] paint formulation

[0070] Acetoacetate-modified alkyd resin 1 (10.0 g) prepared in Example 2 was mixed with water (14.6 g), desiccant blend (0.34 g) and Silwet L-77 (OSI Specialties) (0.06 g) to prepare a coating formulation. A control formulation was also prepared using the unmodified resin of Example 1. A desiccant blend was prepared by mixing Zirconium HYDRO-CEM (12%, OMG Americas) (26.9 g), Cobalt HYDRO-CURE II (OMG Americas) (13.1 g) and Ethylene Glycol Monobutyl Ether (EB) (10.0 g) thing.

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Abstract

A waterborne acetoacetate-functionalized alkyd coating composition is disclosed which includes an acetoacetate-functionalized alkyd resin, at least one drier, and water. The acetoacetate-functionalized alkyd resin is the reaction product of (i) an alkyd resin, and (ii) an alkyl acetoacetate. Also disclosed is a method of preparing a waterborne acetoacetate-functionalized alkyd coating composition which includes the step of contacting an acetoacetate-functionalized alkyd resin with at least one drier in the presence of water.

Description

technical field [0001] The present invention relates to waterborne coating compositions, and more particularly, to waterborne coating compositions having acetoacetate-functionalized alkyd resins. Background technique [0002] In recent years, considerable efforts have been made in the coatings industry to develop coating formulations that contain little or no volatile organic compounds (VOCs). Regulations limiting the amount of VOCs in the field of industrial coatings have encouraged research and development of new technologies aimed at reducing solvent emissions from industrial solvent-based coating operations in products such as automobiles, appliances, general metalwork, furniture, and the like. However, despite the health and safety benefits of reducing organic solventborne compositions, these lower VOC coating compositions must still meet or exceed the technical performance standards expected of solventborne compositions. [0003] Alkyd resins are one of the most commo...

Claims

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Application Information

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IPC IPC(8): C08G63/49C08G63/91C09D167/08
CPCC09D167/08C08G63/914Y10T428/31786Y10T428/3179
Inventor 郭钊明P·V·格罗斯索G·E·斯皮尔曼M·D·克拉克
Owner EASTMAN CHEM CO
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