公开(公告)号：US20170306177A1

公开(公告)日：2017-10-26

申请号：US15646242

申请日：2017-07-11

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： BERND KUEHNEWEG ,  BJÖRN WEBER ,  TIMOTHY N. NARUM ,  STUART E. FORES ,  IAN ROBINSON ,  EVA MARIA ROGGENTIN ,  GUIDO HITSCHMANN ,  RAINER KURZ

IPC: C09D175/08 ,  B05B13/00 ,  B05D3/00 ,  B64C11/20 ,  C08G18/73 ,  C08G18/66 ,  C08G18/10 ,  B64C27/473 ,  C08G18/48 ,  F01D5/28

CPC classification number: C09D175/08 ,  B05B13/00 ,  B05D3/007 ,  B64C11/205 ,  B64C27/473 ,  C08G18/10 ,  C08G18/4854 ,  C08G18/6674 ,  C08G18/73 ,  F01D5/288 ,  F05D2240/304 ,  F05D2300/43 ,  Y10T428/31551

Abstract: Provided are reactive compositions for making a polyurethane-based rain-erosion protective coating for rotor blades, the reactive composition comprising an isocyanate-reactive component and an isocyanate-functional component and wherein the isocyanate-reactive component comprises a first component i) being a short chain hydroxyl-functional compound having two terminal (α−ω) hydroxyl groups, a molecular weight of less than 250 g/mole and containing at least 2 carbon atoms and a second component ii) comprising a high molecular weight hydroxyl-functional compound having two terminal (α−ω) hydroxyl groups and a molecular weight of at least 250 g/mol and comprising one or more units selected from oxyalkylene units and polyoxyalkylene units and wherein the isocyanate-functional component is an isocyanate prepolymer of the general formula NCO—Z—NCO, wherein Z is a linking group comprising at least two urethane (—NH—CO—O—) units and additionally one or more units selected from alkylenes, oxyalkylenes, polyoxyalkylenes, alkylene esters, oxyalkylene esters, polyoxyalkylene esters and combinations thereof. Also provided are protective coatings obtained from the reactive compositions and methods of applying the coatings to articles.

公开(公告)号：US20180142122A1

公开(公告)日：2018-05-24

申请号：US15568037

申请日：2016-04-18

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： BJÖRN WEBER ,  FRANS A. AUDENAERT

IPC: C09D175/04 ,  C08G18/38 ,  C08G18/87 ,  C08G18/12

CPC classification number: C09D175/04 ,  B05D3/108 ,  C08G18/10 ,  C08G18/12 ,  C08G18/3206 ,  C08G18/3812 ,  C08G18/3857 ,  C08G18/3861 ,  C08G18/387 ,  C08G18/3872 ,  C08G18/87 ,  F01D5/288

Abstract: The present disclosure relates to two-part polyurethane coatings having excellent erosion resistance and comprising a compound having a fluorinated segment. Additionally, these two-part polyurethane coatings can be cured under high relative humidity conditions. The present disclosure also relates to articles coated with those two-part polyurethane coatings and to methods of reducing erosion in an article, among other embodiments.