US 11,780,176 B2
Method for preparation of a moulded composite from a bulk moulding compound
Gaetano La Delfa, Naters (CH); Stefan Ellinger, Visp (CH); Roger Mazotti, Visp (CH); Marcel Sommer, Grenzach-Wyhlen (DE); Stefano Licari, Busto Arsizio (IT); and Sandro Landonio, Busto Arsizio (IT)
Assigned to Arxada AG, Visp (CH)
Appl. No. 17/792,312
Filed by Arxada AG, Visp (CH)
PCT Filed Feb. 12, 2021, PCT No. PCT/EP2021/053559
§ 371(c)(1), (2) Date Jul. 12, 2022,
PCT Pub. No. WO2021/160866, PCT Pub. Date Aug. 19, 2021.
Claims priority of application No. 20157481 (EP), filed on Feb. 14, 2020.
Prior Publication US 2023/0102052 A1, Mar. 30, 2023
Int. Cl. B29C 70/02 (2006.01); B29C 45/00 (2006.01); B29C 45/56 (2006.01); C08G 18/02 (2006.01); C08K 7/06 (2006.01); C08K 7/14 (2006.01); B29K 105/12 (2006.01); B29K 307/04 (2006.01); B29K 309/08 (2006.01)
CPC B29C 70/025 (2013.01) [B29C 45/0001 (2013.01); B29C 45/561 (2013.01); C08G 18/02 (2013.01); C08K 7/06 (2013.01); C08K 7/14 (2013.01); B29K 2105/12 (2013.01); B29K 2307/04 (2013.01); B29K 2309/08 (2013.01); B29K 2849/00 (2013.01)] 14 Claims
 
1. A bulk moulding compound comprising one or more cyanate ester, a catalyst, a filler and reinforcement fibres, wherein the one or more cyanate ester is independently selected from
a) a difunctional cyanate ester compound of formula (I)

OG Complex Work Unit Chemistry
wherein
R1 through R8 are independently selected from the group consisting of hydrogen, linear C1-10 alkyl, halogenated linear C1-10 alkyl, branched C4-10 alkyl, halogenated branched C4-10 alkyl, C3-8 cycloalkyl, halogenated C3-8 cycloalkyl, C1-10 alkoxy, halogen, phenyl and phenoxy;
Z1 indicates a direct bond or a divalent moiety selected from the group consisting of —O—, —S—, —S(═O)—, —S(═O)2—, —CH2—, —CH(CH3)—, —C(CH3)2—, —CH(CF3)—, —C(CF3)2—, —C(═O)—, —C(═CH2)—, —C(═CCl2)—, —Si(CH3)2—, linear C1-10 alkanediyl, branched C4-10 alkanediyl, C3-8 cycloalkanediyl, 1,2-phenylene, 1,3-phenylene, 1,4-phenylene, —N(R13)— wherein R13 is selected from the group consisting of hydrogen, linear C1-10 alkyl, halogenated linear C1-10 alkyl, branched C4-10 alkyl, halogenated branched C4-10 alkyl, C3-8 cycloalkyl, phenyl and phenoxy, and moieties of formulas

OG Complex Work Unit Chemistry
wherein X is independently selected from hydrogen and halogen;
and oligomers, polymers or mixtures thereof; and/or
b) a polyfunctional cyanate ester of formula (II)

OG Complex Work Unit Chemistry
wherein
n is an integer from 1 to 20; and
R10 and R11 are identical or different and independently from each other selected from the group consisting of hydrogen, linear C1-10 alkyl and branched C4-10 alkyl;
and oligomers, polymers or mixtures thereof,
and mixtures of cyanate esters of formula (I) and (II); and
wherein the catalyst is aluminum(III)acetylacetonate.