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Liquid thermally hardening mixtures method for production and use thereof

A thermosetting, mixture technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve problems such as deficiencies, and achieve the effect of low viscosity, easy processing and handling, and good fluidity

Inactive Publication Date: 2008-12-17
BASF AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although certain compounds, such as reactive diluents, do produce improvements in this respect, because the known coatings have significantly lower viscosities than coatings without these compounds, the effect is however essential for providing a handleable - especially coatable - heat-curing mixtures, especially coatings with a solids content exceeding 80% by weight, especially clearcoat materials are insufficient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0133] Preparation of clear coat material 1

[0134] 2 parts by weight of ethyl ethoxy propionate, 5 parts by weight of 2,4-diethyloctane-1,5-diol, 2.8 parts by weight of trimethylolpropane and 0.2 parts by weight of Triton X100 (nonionic surface reactive agent from Fluka) were mixed with each other and homogenized with ultrasound at 55° C. for 10 minutes. This resulted in a clear, storage-stable solution (A / B) which showed no change in viscosity even after 35 days of storage at 40°C.

[0135] By making 46.6 parts by weight of Basonat in 30 parts by weight of ethyl ethoxy propionate Compound (C1) (blocked polyisocyanate ). After this time, free isocyanate groups were no longer detected.

[0136] To prepare clearcoat material 1, 25 parts by weight of solution (A / B) and 16.6 parts by weight of TACT (tris(alkoxycarbonylamino)triazine; see DE 199 40 855 A1, col. 26, pp. 27-53 Rows, especially rows 49-53; compounds C2) are mixed with each other. The resulting mixture was he...

Embodiment 2

[0139] Preparation of black multicoat paint system with clear coat 1

[0140] The test panels used were steel panels that had been coated with a conventional cathodically deposited and baked electrocoat. In each case a coat of a conventional water-based surfacer from BASF Coatings AG and a coat of a conventional black aqueous topcoat material (“nachtschwarz”) from BASF Coatings AG were applied on top of the electrocoat. Coating, application is wet-on-wet. After their application, the coatings were each initially dried at 80° C. for 10 minutes.

[0141] Clearcoat material 1 from Example 1 was coated on test panels. The resulting wet clearcoat film 1 was baked at 150° C. for 23 minutes together with the initially dried water-based surfacer coat film and the initially dried aqueous baser coat film. The dry film thickness of the obtained clear coat 1 was 40 μm.

[0142] The overall visual appearance of the resulting multicoat coating system is excellent. Their clearcoats 1 ex...

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Abstract

The invention relates to liquid thermally hardening mixtures comprising: A) low-molecular weight polyols with at least three hydroxyl groups and a hydroxy group content corresponding to a theoretical OH-number of 800 to 1,900 mg KOH / g, B) compounds selected from the group of cyclic and acyclic C9 - C16 alkanes, functionalised with hydroxy groups or hydroxy groups and at least one thiol group and C) low molecular weight or oligomeric compounds with reactive functional groups (c1) complementary to hydroxy and thiol groups, methods for production and use thereof.

Description

technical field [0001] The present invention relates to novel liquid thermosetting mixtures. The invention also relates to a new process for preparing liquid thermosetting mixtures. The invention relates in particular to the use of the novel liquid thermosetting mixture and the use of the liquid thermosetting mixture prepared by the novel process. Background technique [0002] Comprising cyclic and acyclic C functionalized with at least two hydroxyl groups or with at least one hydroxyl group and at least one thiol group 9 -C 16 Heat-curing mixtures of compounds of alkanes, especially paints, especially clearcoat materials, are known from German patent applications DE 198 09 643 A1 and DE 19940 855 A1. The known thermosetting coatings necessarily comprise at least one polymeric binder. Thus, for example, DE 199 38 758 A1 in Example 1 describes the preparation of polyesters for use as polymer binders in clearcoat paints. In order to be able to process and especially apply...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/32C09D175/04
CPCC08G18/3206C08G18/6644C08G18/6677C09D175/04
Inventor A·波佩E·韦斯特霍夫S·黑泽纳
Owner BASF AG
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