US 9,808,969 B2
Fiber composite component and a process for the production thereof
Stefan Lindner, Köln (DE); Klaus Franken, Bergisch Gladbach (DE); Dirk Passmann, Oberhausen (DE); and Peter Nordmann, Dormagen (DE)
Assigned to COVESTRO DEUTSCHLAND AG, Leverkusen (DE)
Appl. No. 13/817,300
Filed by Stefan Lindner, Köln (DE); Klaus Franken, Bergisch Gladbach (DE); Dirk Passmann, Oberhausen (DE); and Peter Nordmann, Dormagen (DE)
PCT Filed Aug. 12, 2011, PCT No. PCT/EP2011/063907
§ 371(c)(1), (2), (4) Date Apr. 29, 2013,
PCT Pub. No. WO2012/022683, PCT Pub. Date Feb. 23, 2012.
Claims priority of application No. 10 2010 039 346 (DE), filed on Aug. 16, 2010.
Prior Publication US 2013/0244520 A1, Sep. 19, 2013
Int. Cl. B29C 45/00 (2006.01); C08G 18/40 (2006.01); C08G 18/58 (2006.01); C08J 5/24 (2006.01); C08G 18/48 (2006.01); B29C 45/02 (2006.01)
CPC B29C 45/0001 (2013.01) [B29C 45/02 (2013.01); C08G 18/4045 (2013.01); C08G 18/4829 (2013.01); C08G 18/58 (2013.01); C08J 5/24 (2013.01); C08J 2375/04 (2013.01); Y10T 442/2992 (2015.04)] 9 Claims
 
1. A sheet-form fibre composite component prepared by the vacuum-assisted resin transfer moulding process, for use in the production of rotor blades of wind turbines, comprising a fibre layer impregnated with polyurethane, wherein the polyurethane is obtainable from a reaction mixture comprising
A) one or more polyisocyanates;
B) one or more polyether polyols comprising an addition product of propylene oxide on a di-functional or poly-functional starter molecule, the polyether polyol(s) comprising at least 80% secondary OH groups;
C) one or more polyepoxides; and
D) optionally additives,
wherein the reaction mixture has a viscosity at 35° C. of from 50 to 250 mPa and a ratio of the number of NCO groups to the number of OH groups of component B) of from 1.3:1 to 10:1 and a ratio of the number of NCO groups to the number of epoxide groups of component C) of from 1.1:1 to 10:1, and
wherein the one or more polyisocyanates consists of mixtures of diphenylmethane diisocyanate and polyphenylenepolymethylene polyisocyanate with a monomer content of from 70 to 95 wt. % in the polyisocyanate component of A) based on the total weight of the polyisocyanate components.