Patent · US Active

Water-based primer composition for polycarbonate and polycarbonate blends

US10385159B2 · kind B2 · utility

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15Claims

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Assignee

SIKA TECHNOLOGY AG · CH

Inventors

Dirk Urbach · Ahrensburg, DE
Michael Oeser · Wedel, DE
Andre Buchholz · Georgsmarienhütte, DE
Thomas HANHÖRSTER · Pinneberg, DE

Key dates

Filing date	Feb 4, 2016
Grant date	Aug 20, 2019
Priority date	—
Expiry date	Jul 23, 2036

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09J2475/003
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A water-based primer composition is particularly suitable for the pre-treatment of polycarbonate substrates, and has a component K1 having an aqueous epoxy resin dispersion, an aqueous polyester-polyurethane dispersion and an aqueous polyacrylate dispersion, and optionally a water-miscible organic solvent, and a second component K2 containing a water-dispersible curing agent based on isocyanate. The primers provide a strong bonding of subsequently applied adhesives to polycarbonate substrates, and permit a processing with a significant reduction in VOC emissions and the prevention of the occurrence of stress-cracks.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.