Лако-красочные материалы — производство

A typical impact toughness-modified, one-part epoxy resin adhesive consists of 45% epoxy base resin, 17.5% crosslinking agent (e. g. novolac resin), 27.5% additive to improve the impact toughness, 2.5% pyrogenic silicic acid as rheology additive, 5.5% hardener (e. g. dicyandiamide), and 2% accelerator (e. g. a urea derivative).

The typical parts A and B of a flexibilized, impact toughness-modified, two-part epoxy resin adhesive for use in the car manufacturing industry are composed as follows:

• Part A

— 48% epoxy base resin

-13% reaction diluting agent

— 9% additive to improve impact toughness (e. g. core-shell polymer)

-1.5% adhesion promoter (e. g. a functional silane)

— 0.5% pyrogenic silicic acid as rheology additive

-1.5% glass beads -17.5% filler (e. g. a silicate)

— 7.8% glass bubbles -1.2% pigment

• Part B

— 42% hardener (e. g. an amino amide)

-8.5% catalyst (e. g. a tertiary amine)

-16% flexibilizer

-7% hardener (e. g. a primary amine)

— 23% filler

— 3% pyrogenic silicic acid

The volume-mixing ratio of part A (epoxy) to part B (hardener) is 4 : 1.

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