US 12,410,320 B2
Dual cure cyanate ester inkjet composition
Anne Asmacher, Hannover (DE); Rolf Mühlhaupt, Freiburg (DE); Filipp Petrov, Lehrte (DE); Jürgen Omeis, Reken (DE); Frank Walter, Rüsselsheim (DE); and Max Röttger, Hannover (DE)
Assigned to Altana New Technologies, GmbH, Wesel (DE)
Appl. No. 18/032,231
Filed by ALTANA NEW TECHNOLOGIES GMBH, Wesel (DE)
PCT Filed May 10, 2022, PCT No. PCT/EP2022/062672
§ 371(c)(1), (2) Date Apr. 17, 2023,
PCT Pub. No. WO2022/258284, PCT Pub. Date Dec. 15, 2022.
Claims priority of application No. 21178542 (EP), filed on Jun. 9, 2021.
Prior Publication US 2023/0399519 A1, Dec. 14, 2023
Int. Cl. C09D 4/00 (2006.01); B29C 64/112 (2017.01); B29C 64/30 (2017.01); B29C 71/02 (2006.01); B33Y 10/00 (2015.01); B33Y 40/20 (2020.01); B33Y 70/00 (2020.01); C08G 18/67 (2006.01); C08G 18/76 (2006.01); C09D 7/63 (2018.01); C09D 175/14 (2006.01); B29K 23/00 (2006.01); B29K 75/00 (2006.01)
CPC C09D 4/00 (2013.01) [B29C 64/112 (2017.08); B29C 64/30 (2017.08); B29C 71/02 (2013.01); B33Y 10/00 (2014.12); B33Y 40/20 (2020.01); B33Y 70/00 (2014.12); C08G 18/6755 (2013.01); C08G 18/676 (2013.01); C08G 18/678 (2013.01); C08G 18/7671 (2013.01); C09D 7/63 (2018.01); C09D 175/14 (2013.01); B29K 2023/38 (2013.01); B29K 2075/02 (2013.01); B29K 2995/0077 (2013.01); B29K 2995/0082 (2013.01)] 26 Claims
 
1. An inkjet composition comprising:
i) photo polymerization reactive compound (M) containing exactly one acryloyl group,
ii) photo polymerization reactive compound (N) containing at least two acryloyl groups,
iii) radical photoinitiator (R),
iv) cyanate ester compound (D) containing at least two cyanate groups, and
v) cyanate ester curing catalyst (C), wherein
(M) is different from (D) with the proviso that cyanate ester compound containing exactly one acryloyl group and additionally containing at least two cyanate groups is subsumed to (D),
(N) is different from (D) with the proviso that cyanate ester compound containing at least two acryloyl groups and additionally containing at least two cyanate groups is subsumed to (D),
25-50 mol % of the contained acryloyl groups are provided by the reactive compound (N) and the molar ratio of contained acryloyl groups to contained cyanate groups of compound (D) is 0.30 to 0.95, and
the inkjet composition has 1.0-5.0 mol/kg acryloyl groups.