US 11,028,234 B2Granted

Addition-curable silicone composition

AssigneeShin-Etsu Chemical Co., Ltd.

InventorKeita Kitazawa

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Abstract

This addition-curable silicone composition contains (A) an organopolysiloxane having at least two unsaturated aliphatic hydrocarbon groups in each molecule, (B) an organohydrogenpolysiloxane in an amount that provides a value of 0.5-5 for the ratio of the number of SiH groups to the total number of unsaturated aliphatic hydrocarbon groups in the component (A), and (C) an effective amount of hydrosilylation catalyst microparticles that have a microcapsule structure containing a platinum-group metal catalyst-containing organic compound or polymer compound as a core material and a three-dimensional crosslinked polymer compound obtained by polymerizing at least one polyfunctional monomer as a wall material, the platinum-group metal catalyst-containing organic compound or polymer compound having a dynamic viscosity of 10-100,000 mm2/s at 25° C.

Claims4

Dependent claims

An addition curable silicone composition comprising:

(A) an organopolysiloxane containing at least two aliphatic unsaturated hydrocarbon groups per molecule and having a kinematic viscosity of 60 to 100,000 mm2/s at 25° C.,
(B) an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms per molecule, in such an amount that a ratio of the number of Si—H groups to the total number of aliphatic unsaturated hydrocarbon groups in component (A) ranges from 0.5 to 5, and
(C) an effective amount of a microparticulate hydrosilylation catalyst of microcapsule structure consisting of a core material of an organic compound or polymer containing a platinum group metal catalyst and a shell material of a three-dimensional crosslinked polymer obtained by polymerizing at least one polyfunctional monomer, the organic compound or polymer containing a platinum group metal catalyst having a kinematic viscosity of 10 to 100,000 mm2/s at 25° C.,
wherein the polyfunctional monomer is a polyfunctional monomer having at least two polymerizable carbon-carbon double bonds per molecule.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 16/498,222Filed 19 Mar 2018
Priority: JP JP2017-06067527 Mar 2017
Published: US 2020/0032000 A130 Jan 2020
Granted: 8 Jun 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification22 codes

C08F 222/102
Of polyhydric alcohols or polyhydric phenols: of dialcohols, e.g. ethylene glycol diacrylate or 1,4-butanediol dimethacrylate
C08G 77/50
In which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms: by carbon linkages
B01J 23/42
Of the platinum group metals: platinum
B01J 31/22
Containing coordination complexes: organic complexes

Family

US 2020/0032000 A1Pre-grant publication · published 30 Jan 2020
US 11,028,234 B2This patent

From the US filing history. Foreign family members aren’t listed.

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