2K Epoxy primer surfacer, WB, yellow, high sandability, e. g. for trains

Guide formulation for a 2K (two-component) epoxy primer surfacer, specifically designed for industrial coatings, likely for application on surfaces such as those found on trains. The formulation emphasizes high requirements for sandability and corrosion protection.

Here's a breakdown of the key components and processes mentioned:

1. Component A: This consists of several parts, including demineralized water, additives such as Additol VXW 6208 and VXW 6393, Texanol, AKTISIL AM, Kronos 2190, Bayferrox pigments, Microtalc IT Extra, Additol VXW 6388, methoxy propanol, and curing agents like Beckocure EH 2261w/41WA and TACorr MSW along with flashproTAC C4E.
2. Component B: This includes Beckopox EP 387w/52WA and demineralized water.
3. Preparation: It involves mixing raw materials from each component in the indicated order. For component A, it specifies stirring and dispersing by dissolver with a toothed disc to achieve a particle size of 20 µm. Component B is simply mixed.
4. Application: The components A and B are mixed shortly before application, undiluted with a doctor blade in a single layer onto a specific substrate (cold-rolled steel Q-Panel Type R-48). Drying times and conditions are provided, with a dry film thickness of approximately 80 µm.
5. Suppliers: Various suppliers are mentioned for the raw materials used in the formulation.

Additionally, the document provides technical data and performance characteristics, such as mixing ratios, degree of cross-linking, solids content, PVC (pigment volume concentration), sedimentation stability, viscosity, hardness, adhesion properties, resistance to tests like cross-cut, salt spray, and sandability tests (both machine and manual).

The formulation aims to achieve specific properties like good sandability, excellent corrosion protection, substrate adhesion, storage stability, and sedimentation protection.

This formulation guide seems quite detailed and provides comprehensive information for formulating the epoxy primer surfacer for industrial coating applications, meeting the specific requirements of the intended use case, which in this instance is likely the coating of train surfaces.