US 12,030,902 B2
Polymer crosslinking agent, and high molecular weight polymer and composition using same
Ryunosuke Hata, Takasaki (JP)
Assigned to SHIN-ETSU CHEMICAL CO., LTD., Tokyo (JP)
Filed by SHIN-ETSU CHEMICAL CO., LTD., Tokyo (JP)
Filed on Jul. 14, 2020, as Appl. No. 16/928,057.
Claims priority of application No. 2019-130815 (JP), filed on Jul. 16, 2019.
Prior Publication US 2021/0017199 A1, Jan. 21, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C07F 7/08 (2006.01); C08G 77/38 (2006.01); C08K 3/34 (2006.01); C08K 5/01 (2006.01); C08K 5/10 (2006.01)
CPC C07F 7/0834 (2013.01) [C08G 77/38 (2013.01); C08K 3/34 (2013.01); C08K 5/01 (2013.01); C08K 5/10 (2013.01)] 10 Claims
 
1. A polymer crosslinking agent which comprises a (meth)acrylic-based graft silicone which has a main chain having (meth)acrylic-based repeating units represented by the following formulae (I), (II) and (III), and a side chain having an unsaturated bond(s) and an organopolysiloxane structure:

OG Complex Work Unit Chemistry
wherein, R1s each independently represent a hydrogen atom or a methyl group,
A represents an alkoxy group having 1 to 22 carbon atoms, an aryloxy group having 6 to 20 carbon atoms, a substituted or unsubstituted monovalent hydrocarbon group having 1 to 20 carbon atoms which may contain one or more kinds selected from —O—, —S— and —NR—,
where R represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 20 carbon atoms, provided that the oxygen atom, the sulfur atom and the nitrogen atom are not adjacent to each other,
an amino group, a dialkylsiloxy group, a halogen atom or a hydroxyl group;
B is a 2-allyloxyethoxy group;

OG Complex Work Unit Chemistry
C represents any of a group having a linear organopolysiloxane structure represented by the following formula (2), or a group having a dendritic organopolysiloxane structure represented by the following formula (3-1) or (3-2):

OG Complex Work Unit Chemistry
in the formula (2), Z1 represents a divalent organic group, R3 s each independently represents a saturated hydrocarbon group having 1 to 10 carbon atoms or a phenyl group, R4 represents a saturated hydrocarbon group having 1 to 10 carbon atoms, and “m” is an integer of 0 to 100;

OG Complex Work Unit Chemistry
in the formulae (3-1) and (3-2), Z2 represents a divalent organic group, “a” is a number of 0 to 3, Q represents a group represented by the following formula (3), D represents an organopolysiloxanyl group having a dendritic structure with a hierarchical number of “c” and a valence of 3c+1, that is, “3 to the cth power”+1, “c” is an integer of 1 to 8,

OG Complex Work Unit Chemistry
R5 represents a saturated hydrocarbon group having 1 to 10 carbon atoms or a phenyl group; R6 represents a saturated hydrocarbon group having 1 to 8 carbon atoms or a phenyl group; R7 represents a hydrogen atom, a saturated hydrocarbon group having 1 to 10 carbon atoms or a phenyl group, a2 is a real number of 0 to 2, and “n” is an integer of 2 to 12;
an order of bonding of the repeating units represented by the formulae (I), (II) and (III) is not limited, “p”, “q” and “r” are integers, “q” and “r” are not 0, and are numbers in which a number average molecular weight of the polymer crosslinking agent is 1,000 to 1,000,000 g/mol.