Additive for improving the early resistance to driving rain of coating compositions and the use thereof

US7897669B2 · kind B2 · utility

Assignee

• Hilti Aktiengesellschaft · LI

Inventors

• Christian Foerg · Dillishausen, DE
• Klaus Gebauer · Krefeld, DE
• Herbert Muenzenberger · Wiesbaden, DE
• Sebastian Simon · Buchloe, DE

Key dates

• Filing date: Jul 2, 2009
• Grant date: Mar 1, 2011
• Expiry date: Jul 2, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L79/02
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An additive for improving the early resistance to driving rain of physically curing coating compositions based on an aqueous acrylate dispersions, which have been adjusted to an alkaline pH with an inorganic or organic base, which is volatile at ambient temperature, is formed of an aqueous dispersion, containing a polyethyleneimine with a number average molecular weight in the range from 50,000 to 3,000,000, at least one representative of the group comprising 1,3-dihydroxy-2,2,4-trimethylpentane and esters thereof, butyl diglycol acetate and methoxypropanol as film-forming agents and at least one representative of the group comprising the liquid acrylates and pyrogenic silica as thickening agent, as well as optionally a pigment and optionally an ammonium acrylate as pigment disperser, and the use thereof.