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：US20170283659A1

公开(公告)日：2017-10-05

申请号：US15630192

申请日：2017-06-22

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： STEFFEN TRASER ,  BERND KUEHNEWEG ,  CHRISTIAN CLAUS ,  JAN D. FORSTER

IPC: C09J5/08 ,  B32B37/24 ,  F03D1/06 ,  C09J7/02

CPC classification number: F03D1/0675 ,  B32B37/24 ,  C09J5/08 ,  C09J7/20 ,  C09J7/385 ,  C09J2201/28 ,  C09J2201/36 ,  C09J2475/006 ,  Y02E10/721 ,  Y10T156/10 ,  Y10T428/24496 ,  Y10T428/24521 ,  Y10T428/24612

Abstract: A multilayer protective tape (1) for rotor blades of wind energy turbines said tape (1) having a protective top layer (2) comprising a polymer film and an adhesive bottom layer (3), wherein the top layer (2) has a continuous surface (S) that is outwardly curved or outwardly trapezoidal surface such that the tape (1) has a cross-sectional profile having an inner section between two lateral sections and wherein the inner section has a thickness (T1) made up by the thickness of the top layer (2) and adhesive bottom layer (3) that is greater than the thickness of at least one of the lateral sections (T1,T2) made up by the thickness of the top layer (2) and adhesive bottom layer (3) and wherein the thickness (T1 or T2) of at least one lateral section is at most 600 μm and the thickness of the inner section (T1) is at least 330 μm.Also provided are processes for making profiled tapes and methods for applying the tapes to rotor blades and blades containing protective tapes.