Two-component polyurethane adhesive
AssigneeHenkel AG & Co. KGaA
InventorsJulius Herold, Hermann Kluth, Alfred Meffert, Manfred Leder
Life of this patent
Estimating the term…
Abstract
The invention relates to two-component polyurethane adhesive preparations in which the resin component is an oleochemical polyol. The oleochemical polyols used are ring-opened products of the reaction of epoxidized fatty alcohols, fatty acid esters (particularly triglycerides) or fatty acid amides with alcohols. The oleochemical polyols may be varied within wide limits in regard to their OH-functionality and so formulated with the hardener polyisocyanate components that the adhesives satisfy the relevant requirements. Reaction products of epoxidized triglycerides with monohydric alcohols are a particularly effective substitute for castor oil.
Claims17
A two-component polyurethane adhesive preparation consisting of
- (A) an isocyanate compound having a functionality of from 2 to 10, as hardener, and
- (B) A substantially anhydrous polyol, as resin, Components (A) and(B) being separately storable prior to their combination and at least one of said components being adapted to contain adhesive auxiliaries selected from the group consisting of solvents, accelerators, fillers, plasticizers flameproofing agents, retarders, dyes, anti-agers and mixtures thereof, wherein said resin component is a liquid mixture of anhydrous polyols, said polyols having more than 10 carbon atoms and more than 1 hydroxyl group per molecule obtained by the reaction of an epoxy compound selected from the group consisting of epoxidized higher fatty alcohols, epoxidized higher fatty acid esters, epoxidized higher fatty acid amides, with an alcohol having a functionality of from 1 to 10, said reaction opening the epoxide ring with formation of a secondary hydroxyl group and an adjacent ether group, and optionally further reaction with C.sub.2 -C.sub.4 -alkylene oxides.
Dependencies are inferred from the claim text.