{"L1_core": {"domain": "material", "category": "polymer", "subcategory": "thermoset", "abbreviation": "EP", "chemical_name": "epoxide"}, "L5_metadata": {"updated": "2026-01-04", "version": "1.0"}, "L3_standards": {"en": ["EN 13706"], "iso": ["ISO 3673"], "astm": ["ASTM D1763"]}, "L2_properties": {"physical": {"density_g_cm3": [1.1, 1.4], "service_temp_c": [-40, 150], "pot_life_minutes": [5, 90]}, "mechanical": {"tensile_strength_mpa": [35, 90]}, "characteristics": ["two-component", "high-strength", "chemical-resistant", "adhesive"]}, "L4_applications": ["structural-adhesives", "protective-coatings", "composites", "electronics-potting"]}