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Coating compositions including a polyisocyanate chain extended NH functional pre-polymer

A technology of polyisocyanate and composition, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of insufficient pot life and characteristics, and achieve the effect of excellent mechanical properties, balanced mechanical properties, and balanced optical properties

Active Publication Date: 2017-07-14
AXALTA COATING SYST GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The balance of pot life and properties of these coating compositions, such as substrate adhesion and / or intercoat adhesion after application / drying and color and / or color stability of liquid paints, is therefore critical for certain applications. Insufficient

Method used

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  • Coating compositions including a polyisocyanate chain extended NH functional pre-polymer
  • Coating compositions including a polyisocyanate chain extended NH functional pre-polymer
  • Coating compositions including a polyisocyanate chain extended NH functional pre-polymer

Examples

Experimental program
Comparison scheme
Effect test

example

[0040] Examples include 2-[2-(2-aminoethoxy)ethoxy]ethylamine (e.g. Jeffamine XTJ-504, available from Huntsman), 3-[2-(3-aminopropoxy)ethoxy ]propylamine (for example Etheramine NDPA 10, available from Tomah Products), 3-[3-(3-amino-propoxy)propoxy]propylamine (for example Etheramine NDPA 11, available from Tomah Products), 3-[4- (3-amino-propoxy)butoxy]propylamine (e.g. Etheramine NDPA 12, available from Tomah Products), 3-{2-[2-(3-aminopropoxy)ethoxy]ethoxy } Propylamine (eg EtheramineDPA-DEG, available from Tomah Products; or BASF TTD, available from BASF).

[0041] The NH functional prepolymers are also prepared from at least one disubstituted maleate and / or disubstituted fumarate.

[0042] The term "at least one" disubstituted maleate and / or disubstituted fumarate in the sense of the present disclosure means that the disubstituted maleate and / or the disubstituted fumarate respectively comprise one or more A plurality of disubstituted maleates and / or disubstituted fumarat...

Embodiment

[0165] Measurement methods

[0166] The following measurement methods were used to evaluate the parameters given in the examples and claims.

[0167] Hazen Chroma

[0168] Colorimetry was measured on the Hazen scale (based on ASTM D1209) with a BYK LCSIII device.

[0169] viscosity

[0170] ・The viscosity of the resin depends on Method determination. Measurements are carried out based on DIN 53015 at 25°C.

[0171] - Determine the viscosity of the activated clearcoat with a DIN 4 flow cup at room temperature (20±3°C). This method is based on DIN53211.

[0172] Applicable period

[0173] The pot life of the composition is measured by measuring the viscosity (DIN 4 cup) increase as a function of time. The pot life is defined as the time required to increase the initial viscosity to 1.5 times. Pot life defines the period of time during which the clearcoat composition remains readily sprayable.

[0174] hardness

[0175] The coating was applied to glass at a dry film t...

Embodiment 5

[0242] Embodiment 5: preparation is based on the transparent coating of comparative example 1, comparative example 2 and comparative example 3 and invention example 4

[0243] Clear coating compositions have been prepared by first activating the products obtained in Comparative Examples 1, 2 and 3 and Inventive Example 4 with a polyisocyanate activator based on 65% (aliphatic polyisocyanate HDI terpolymer, 90% solids, Bayer), 32.37% n-butyl acetate, epoxy functional silane (2.4% from Momentive), 0.2% p-toluenesulfonyl isocyanate (pTSI 96% from Aldrich) and 0.27% DBTDL catalyst (TINSTAB BL 277 from Akcros Chemicals). The product and activator were mixed manually in such a ratio that the ratio of NCO to NH was kept constant at 1.26. The total solids content of the activated mixture has also been kept constant at 57% by weight, based on the total weight of the mixture.

[0244] Clearcoats 5A, 5B, 5C and 5D were formulated with the components shown in Table 1 below.

[0245] ...

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Abstract

This disclosure relates to a coating composition including a polyisocyanate chain extended NH functional pre-polymer, a method for coating of a metallic or plastic substrate as well as the use of the polyisocyanate chain extended NH functional pre-polymer for improving the adhesion of a coating composition on a metallic or plastic substrate and / or for improving the adhesion between two adjacent layers of multiple layers and the use of the coating composition in a one-component coating composition or two-component coating composition.

Description

technical field [0001] The present invention relates to coating compositions comprising polyisocyanate-extended NH-functional prepolymers, methods for coating metal or plastic substrates, and polyisocyanate-extended NH-functional prepolymers for improving coating compositions Adhesion on metal or plastic substrates and / or for improving the adhesion between two adjacent layers of multiple layers, and coating compositions in one-component coating compositions or two-component coatings use in coating compositions. Background technique [0002] Several coating compositions are known in the art and are used in a wide variety of applications, such as primers, base coats and clear coats in vehicle original coatings and vehicle refinish coatings. In this regard, great efforts have been made to develop coating compositions that impart desired properties to the substrate or article to be coated. For example, coatings have been developed for eg resistance to abrasion, chemicals, corr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C08G18/38C08G18/75
CPCC08G18/3821C08G18/755C09D175/02C08L75/02C09D135/02
Inventor 约瑟夫·塞雷西亚·海布雷赫茨夏洛特·恩基施-克鲁格利恩·坦格卡门·弗洛斯巴赫安·瓦埃斯
Owner AXALTA COATING SYST GMBH
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