US 10,889,679 B2
Polyurethane hybrid polymers and process for the production thereof
Hans-Detlef Arntz, Overath (DE); Koichi Kawamura, Fujieda (JP); Gerlinde Koss-Nasser, Leverkusen (DE); and Erhard Michels, Cologne (DE)
Assigned to Covestro Deutschland AG, Leverkusen (DE)
Appl. No. 16/764,999
Filed by Covestro Deutschland AG, Leverkusen (DE)
PCT Filed Dec. 14, 2018, PCT No. PCT/EP2018/084866
§ 371(c)(1), (2) Date May 18, 2020,
PCT Pub. No. WO2019/121355, PCT Pub. Date Jun. 27, 2019.
Claims priority of application No. 17209216 (EP), filed on Dec. 21, 2017.
Prior Publication US 2020/0308333 A1, Oct. 1, 2020
Int. Cl. C08G 18/10 (2006.01); C08G 18/20 (2006.01); C08G 18/48 (2006.01); C08G 18/62 (2006.01); C08G 18/76 (2006.01); C08G 18/79 (2006.01)
CPC C08G 18/10 (2013.01) [C08G 18/2063 (2013.01); C08G 18/4837 (2013.01); C08G 18/6204 (2013.01); C08G 18/6262 (2013.01); C08G 18/7664 (2013.01); C08F 2438/03 (2013.01); C08G 18/7671 (2013.01); C08G 18/798 (2013.01)] 2 Claims
 
1. A method for preparing polyurethane hybrid polymers, comprising reacting polyisocyanates (A) with compounds (B) bearing isocyanate-reactive groups and optionally with chain extenders and/or crosslinkers (C) and optionally in the presence of a catalyst (D) and optionally auxiliaries and/or additives (E) in a molar ratio of NCO groups to OH and/or NH groups of 0.8:1 to 3.5:1, wherein
i) the polyisocyanate (A) is an NCO prepolymer having an NCO content of 10% to 40% by weight,
which is prepared from at least one polyisocyanate (A′) comprising at least one of aliphatic or aromatic polyisocyanates and at least one polyol component (B′) comprising at least one of a polystyrene polyol having a number-average molecular weight of >1000 g/mol or a polyacrylonitrile polyol having a number-average molecular weight of >2000 g/mol and having the formula below and prepared as shown below:
2nRCH═CH2+H—[O—R′-]mO—C(O)—R″—S—C(S)—S—R″—C(O)—O[—R′—O]m′—H→H—[O—R′-]mO—C(O)—R″—[CH2—CH(R)—]nS—C(S)—S—[—CH2—CH(R)—]n′—R″—C(O)—O [—R′—O]m′—H
wherein R represents an aromatic radical C6H5 or a nitrile radical CN, n, n′, m, and m′ are each an integer ≥1, and R′ and R″ independently are alkylene radicals, and optionally at least one further polyol (B″) comprising at least one of polyester polyols, polyether polyols, or polyetherester polyols, and
ii) the compound (B) bearing isocyanate-reactive groups that is used is at least one compound comprising at least one of polyester polyols, polyether polyols, polyetherester polyols, or amino-terminated polyethers.