IMPROVED LOW-TEMPERATURE IMPACT RESISTANCE IN PTMEG-BASED POLYURETHANE IMPACT MODIFIERS

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United States of America Patent

SERIAL NO

15549772

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Abstract

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An impact modifier, which is an isocyanate-terminated polymer, the isocyanate groups of which are partially or completely blocked by reaction with a blocking agent, wherein the isocyanate-terminated polymer is a reaction product of a) one or more polyols including polytetramethylene ether glycol in a fraction of at least 95 wt %, with respect to the total weight of the polyols, and b) two or more polyisocyanates, which include at least one diisocyanate and at least one polyisocyanate having an average isocyanate functionality of 2.5 or more, wherein the molar ratio of isocyanate groups of the one or more diisocyanates to isocyanate groups of the one or more polyisocyanates having an average isocyanate functionality of 2.5 or more lies in the range of 2 to 1 to 20 to 1. The impact modifier is suitable in one-component epoxide resin formulations, one-component epoxide resin glues, but also in two-component epoxide resin formulations.

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Patent Owner(s)

Patent OwnerAddress
SIKA TECHNOLOGY AGZUGERSTRASSE 50 BAAR 6340

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
KRÜGER, Christian Schlieren, CH 31 224
RHEINEGGER, Urs Regensdorf, CH 15 97

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