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Fast-dry, high solids coating compositions based on acetoacetate-functionalized alkyd resins

A technology of acetoacetate function and alkyl acetoacetate, which is applied in the direction of polyester coating, coating, thin material treatment, etc., and can solve the problems of Tg increase, insufficient curing, molecular weight increase, etc.

Inactive Publication Date: 2007-02-28
EASTMAN CHEM CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Other disadvantages are: paint formulations containing vinyl alkyd resins require larger amounts of solvents due to the increased molecular weight of vinyl alkyd resins and their increased Tg
In turn, after film formation, this can lead to insufficient curing

Method used

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  • Fast-dry, high solids coating compositions based on acetoacetate-functionalized alkyd resins
  • Fast-dry, high solids coating compositions based on acetoacetate-functionalized alkyd resins
  • Fast-dry, high solids coating compositions based on acetoacetate-functionalized alkyd resins

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preparation example Construction

[0034] In a preferred embodiment of the present invention, the preparation method of acetoacetate functionalized alkyd resin comprises: at about 100~140 ℃, make (a) about 85~about 95wt% alkyd resin and (b) about 5 to about 15% by weight of tert-butyl acetoacetate is reacted until the desired amount of condensate tert-butanol is obtained, wherein the weight percentages are based on the combined weight of (a) and (b).

[0035] The present invention also provides a process for the preparation of an acetoacetate-functionalized alkyd resin composition comprising the step of combining an acetoacetate-functionalized alkyd resin with at least one desiccant in the presence of an organic solvent Mix together, each material as described above. Acetoacetate functionalized alkyd resins can be prepared as described above. Preferably, the acetoacetate functionalized alkyd resin is reacted with at least one desiccant present in an amount of about 0.01 to 1.0 weight percent in an organic solv...

Embodiment 1

[0058] Embodiment 1: the preparation of alkyd resin 1

[0059] Into a three-necked round bottom flask equipped with a mechanical stirrer, steam-jacketed partial condenser, Dean-Stark trap, nitrogen inlet, and water condenser was added pentaerythritol (PE) (425 g), trimethylol Propane (TMP) (174g), soybean oil (2351g) and FASCAT 4350 (0.39g). The resulting mixture was reacted at 238° C. for 5 hrs in this alcoholysis step. To the resulting mixture was then added isophthalic acid (IPA) (950 g) and the refluxing solvent, methyl isobutyl ketone (MIBK) (97.5 g). The reaction was continued at 238° C. until 203 ml of condensate (water) were obtained. The acid value was measured and found to be 8.6 mg KOH / g. The resulting resin was allowed to cool and isolated. The obtained resin had a number average molecular weight (Mn) of 2,500 and a weight average molecular weight (Mw) of 200,000.

Embodiment 2

[0060] Example 2: Preparation of acetoacetate functionalized alkyd resin 1

[0061] 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 (202 g) and acetyl tert-Butyl acetate (t-BAA) (17.1 g, 0.108 mol). The resulting reaction mixture was stirred at 100° C. for 30 min, then at 110° C. for 1.5 hr while collecting the distillate in a Dean-Stark trap. The reaction was continued for 30 min at 120 °C, 30 min at 130 °C, 2 hr at 140 °C, during which time a total of 12.5 ml of distillate was collected. The resulting mixture was then allowed to cool, and the resulting resin collected.

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Abstract

Acetoacetate-functional alkyd resins are disclosed, as are compositions including such resins in combination with at least one drier and an organic solvent. The acetoacetate-functional alkyd resin described is the reaction product of an alkyd resin with an alkyl acetoacetate. Also disclosed are methods of preparing such compositions, and uses for such compositions.

Description

technical field [0001] This invention relates to coating compositions, and more particularly, to coating compositions containing acetoacetate functionalized alkyd resins. Background technique [0002] In recent years, considerable effort has been made in the coatings industry to develop coating compositions that contain little or no volatile organic compounds (VOCs). Regulations on limiting the VOC content of industrial coatings promote the research and development of new processes aimed at reducing the release of solvents from the application of industrial solvent-based coatings, such as those used for automotive parts, equipment, general metal products and furniture, etc. . However, despite the health and safety benefits associated with the use of modified organic solventborne compositions, these low VOC coating compositions must still meet or exceed the performance standards established for solventborne compositions. [0003] Alkyd resins are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/91C09D167/08
CPCC09D167/08C08G63/914Y10T428/31786Y10T428/3179
Inventor T·邝P·V·戈罗斯索G·E·斯皮曼M·D·克拉克
Owner EASTMAN CHEM CO
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