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Thermosetting powders comprising curing agent adducts of polyesters and strong, flexible powder coatings made therefrom

A technology of polyester powder and adducts, applied in the direction of powder coatings, polyester coatings, coatings, etc., can solve the problems of flexibility and impact strength, without revealing the impact strength flexibility of epoxy functional acrylic resin, without revealing And other issues

Active Publication Date: 2008-09-24
阿克苏诺贝尔功能涂料(常州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Decker et al. do not disclose the composition of polyester and polyester hybrid powder systems, and do not address the deficiencies in flexibility and impact strength of either of these systems
Additionally, Decker et al. do not disclose the improved flexibility of epoxy-functional acrylics without loss of impact strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0075] Examples 1-4: Coating Formulations and Properties

[0076] In each of the following examples, the powder and the properties of the powder coating prepared therefrom are evaluated according to the following methods:

[0077] Film thickness: use POSITECTOR (POSITECTOR) purchased from DeFelsko (Ogdensburg), New York, U.S.A. TM Model 600-FN1 Coating Thickness Gauge, according to 2001 ASTM D 1186-01 Test Method B-Electronic Gauge "Standard Test Method for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied on Ferrous Substrates (Standard Test Methods for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to a Ferrous Base)" to measure the film thickness on iron substrates, and the film thickness on nonferrous substrates according to ASTM D 1400-00 in 2000 Non-destructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to a Nonferrous Base (Standard Test Methods for Nondestructive Measurement of Dry...

Embodiment 1

[0088] Example 1 (comparative) and Example 2: Linear polyester adducts containing triglycidyl isocyanurate curing agent in clearcoat formulations

[0089] Table 2 - Recipe

[0090] Example

[0091] 1. Estron Chemical Inc., New York, NY, New York, USA

Embodiment 3

[0092] Examples 3 (comparative) and 4: Inclusion of co-curing agents in clearcoat formulations

[0093] Table 3 - Recipe

[0094] Example

3 (parts by weight)

4 (parts by weight)

1 Styrene / Methyl Methacrylate / Butyl Methacrylate / Methacrylic

Glycidyl Acid Ester PD7610

75.4

75.4

1 Styrene / Methyl Methacrylate / Butyl Methacrylate / Methacrylic

Glycidyl Acid Ester PD6300

24.6

24.6

sebacic acid

18.45

18.45

The flexible many epoxy adducts of the linear polyester obtained in Synthetic Example 1

0.0

5.0

2 Alkyl Acrylate (Co)polymer Flow Modifier Resflo

(RESIFLOW) TM PL-200

1.076

1.076

Benzoin powder degassing aid

0.8

0.8

3 Phosphonite Antioxidant Irgafos (IRGAFOS) TM

0.5

0.5

hindered amine light stabilizer

0.547

0.547

Triazine light absorber

0.547

0.547

4 Brightening a...

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PUM

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Abstract

The present invention provides thermosetting polyester powder or epoxy-containing acrylic powder compositions comprising one or more curing agent adduct of a polyester, preferably a linear polyester, wherein when the said curing agent adduct comprises an adduct of one or more polyepoxy compound, the said polyepoxy compound has an average of 2.01 or more epoxy groups per molecule. The compositionsprovide flexible coatings, films and capstocks having improved impact resistance, especially for use in automotive and architectural applications. To improve impact strength of coatings and films provided thereby, the compositions comprise curing agent adducts of one or more polyepoxy compound chosen from triglycidyl isocyanurate (TGIC) and triglycidyl trimellitate with a carboxyl functional polyester having a carboxyl equivalent weight of 602 or more. In addition, to further improve the impact strength of coatings and films provided thereby, the compositions may comprise one or more adjunct curing agent, such as glycoluril, an aminoplast resin or a blocked isocyanate.

Description

technical field [0001] The present invention relates to a thermosetting powder composition comprising a curing agent adduct of a polyester and a flexible powder coating made from the powder composition. More specifically, the present invention relates to powder compositions comprising thermosetting polyester powder or epoxy-containing acrylic powder, and curing agent adducts of one or more polyesters, preferably linear polyesters, When the curing agent adduct comprises an adduct of a polyepoxide compound, the polyepoxide compound contains an average of 2.01 or more epoxy groups per molecule, and the present invention also relates to the powder composition Prepared automotive and architectural coatings and films that are flexible and have the desired impact resistance. Background technique [0002] Polyester resins and polyester hybrids are widely used commercially because they are less sensitive than their fluoropolymer, acrylic, polyurethane and (in some cases) even epoxy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00C08L63/10C08K5/1515C09D167/00C09D163/10C09D5/03C08J5/18B05D7/14
CPCC09D167/00C08G59/182C08L67/00C09D5/033C09D133/068C09D163/00C08L2312/00C08L2666/18
Inventor D·S·奇诺曼A·T·戴利G·L·塔洛斯
Owner 阿克苏诺贝尔功能涂料(常州)有限公司
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