Adhesive polyorganosiloxane composition

Patent metadata

Field	Value
Publication number	US-12305084-B2
Application number	US-201917293302-A
Country	US
Kind code	B2
Filing date	Nov 13, 2019
Priority date	Nov 13, 2018
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

An adhesive polyorganosiloxane composition includes: (A) a polyorganosiloxane having 2 or more alkenyl groups in each molecule thereof; (B) a polyorganohydrodienesiloxane having 3 or more hydrogen atoms bonded to a silicon atom in each molecule thereof; (C) a platinum-based catalyst; (D) at least two kinds of adhesion-imparting agents selected from the group consisting of specific organic silicon compounds, silane compounds, tetraalkoxysilane compounds, and/or partial hydrolysis condensates thereof; (E) hexamethyldisilazane; (F) water; and (G) at least one of (G1) and (G2), where (G1) is a non-surface-treated inorganic filler having a BET specific surface area of 50 to 500 m 2 /g, and (G2) is an inorganic filler obtained by surface-treating said (G1) with hexamethyldisilazane.

First claim

The invention claimed is:

1. An adhesive polyorganosiloxane composition comprising:
(A) a polyorganosiloxane having 2 or more alkenyl groups in the molecule;
(B) a polyorganohydrogensiloxane having 3 or more hydrogen atoms bonded to a silicon atom in the molecule;
(C) a platinum-based catalyst;
(D) at least two kinds of adhesion imparting agents selected from the group consisting of the following (D1) to (D4):
(D1) an organosilicon compound having a hydrogen atom bonded to a silicon atom, and a side chain of the following formula (I) bonded to a silicon atom:

(D2) an organosilicon compound having a Si(OR 3 ) n group and an epoxy-containing group, and/or a partially hydrolyzed condensate thereof;
(D3) a silane compound having a Si(OR 3 ) n group and an aliphatic unsaturated hydrocarbon group, and/or a partially hydrolyzed condensate thereof; and
(D4) a tetraalkoxysilane compound represented by Si(OR 4 ) 4 , and/or a partially hydrolyzed condensate thereof;
wherein, Q 1 denotes a linear or branched alkylene group forming a carbon chain having 2 or more carbon atoms between the silicon atom and the ester bond; Q 2 denotes a linear or branched alkylene group forming a carbon chain having 3 or more carbon atoms between the oxygen atom and the silicon atom in the side chain; R 3 denotes an alkyl group having 1 to 4 carbon atoms or a 2-methoxyethyl group; R 4 denotes an alkyl group having 1 to 3 carbon atoms; and n is an integer of 1 to 3;

(E) hexamethyldisilazane;
(F) water; and
(G) at least one kind of an inorganic filler selected from (G1) and (G2):
(G1) an inorganic filler without surface treatment having a BET specific surface area of 50 to 500 m 2 /g; and
(G2) an inorganic filler obtained by surface-treating said (G1) with hexamethyldisilazane.

2. The adhesive polyorganosiloxane composition according to claim 1 , wherein (A) is a combination comprising (A1) a linear polyorganosiloxane that is blocked with an R 3 SiO 1/2 unit at both terminals and includes an R 2 2 SiO 2/2 unit as an intermediate unit, and has a viscosity at 23° C. of 0.1 to 500 Pas; and (A2) a branched polyorganosiloxane that essentially includes a SiO 4/2 unit and an R 3 SiO 1/2 unit and optionally includes one or more kinds of units selected from the group consisting of an R 2 SiO 2/2 unit and/or an RSiO 3/2 unit, wherein R is R 1 or R 2 , R 1 is an alkenyl group, R 2 is a monovalent hydrocarbon group having no aliphatic unsaturated bonds, and two or more groups R 1 are present in the molecule.

3. The adhesive polyorganosiloxane composition according to claim 1 , wherein (C) is a platinum-vinylsiloxane complex.

4. The adhesive polyorganosiloxane composition according to claim 1 , further comprising (H1) a zirconium compound.

5. The adhesive polyorganosiloxane composition according to claim 1 , further comprising (H2) a reaction inhibitor.

6. The adhesive polyorganosiloxane composition according to claim 2 , wherein (C) is a platinum-vinylsiloxane complex.

7. The adhesive polyorganosiloxane composition according to claim 2 , further comprising (H1) a zirconium compound.

8. The adhesive polyorganosiloxane composition according to claim 3 , further comprising (H1) a zirconium compound.

9. The adhesive polyorganosiloxane composition according to claim 4 , further comprising (H1) a zirconium compound.

10. The adhesive polyorganosiloxane composition according to claim 2 , further comprising (H2) a reaction inhibitor.

11. The adhesive polyorganosiloxane composition according to claim 3 , further comprising (H2) a reaction inhibitor.

12. The adhesive polyorganosiloxane composition according to claim 4 , further comprising (H2) a reaction inhibitor.

13. The adhesive polyorganosiloxane composition according to claim 5 , further comprising (H2) a reaction inhibitor.

14. The adhesive polyorganosiloxane composition according to claim 6 , further comprising (H2) a reaction inhibitor.

15. The adhesive polyorganosiloxane composition according to claim 7 , further comprising (H2) a reaction inhibitor.

16. The adhesive polyorganosiloxane composition according to claim 8 , further comprising (H2) a reaction inhibitor.

Assignees

• Momentive Performance Mat Jp

Inventors

• Takanashi Masanori

Classifications

• C09J11/04

  inorganic · CPC title

• C08K2201/006

  Additives being defined by their surface area · CPC title

• C08K3/36

  Silica · CPC title

• C09J2203/354

  for automotive applications · CPC title

• C09J2203/326

  for bonding electronic components such as wafers, chips or semiconductors · CPC title