Moisture curable compositions

US10308838B2 · kind B2 · utility

Assignee

• Dow Silicones Corporation · US

Inventors

• Frederic Gubbels · Houtain-le-Val, BE
• David Hagan · Midland, US
• Angela L. Stringer · Cape Coral, US

Key dates

• Filing date: Dec 22, 2014
• Grant date: Jun 4, 2019
• Expiry date: Jan 17, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2205/025
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A moisture curable composition comprises: (A) a polymer containing reactive hydroxyl or hydrolysable groups bonded to silicon which groups are reactive in the presence of moisture; (B) a crosslinking agent comprising at least two groups reactive with the silicon-bonded hydroxyl or hydrolysable groups of polymer (A); (C) one or more reinforcing and/or non-reinforcing fillers; and (D) a silane having the structure (R1)m(Y1)3-mSi—Z1-G1-Z2—Si(R2)q(Y2)3-q. R1 and R2 are alkoxy groups containing from 1 to 6 carbons, Y1 and Y2 are alkyl groups containing from 1 to 8 carbons, Z1 and Z2 are alkylene groups having from 1 to 12 carbons, G1 is a chemical group containing a heteroatom with a lone pair of electrons, and m and q are independently 1, 2 or 3. Silane (D) is present in an amount of from 15 to 30% by weight of the composition and functions as a cure catalyst.