Catalyst System for Moisture Cure of Ethylene-Vinylsilane Copolymers
OwnerSaurav S. Sengupta, Abhijit Ghosh-Dastidar +1inventors
InventorsSaurav S. Sengupta, Abhijit Ghosh-Dastidar, Bharat I. Chaudhary
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Abstract
Ethylene-vinylsilane copolymers are moisture-cured under ambient conditions using a synergistic combination of at least one Lewis acid and at least one Brønsted acid or at least one Lewis base and at least one Brønsted base. Preferably the catalyst system comprises a Lewis acid, e.g., dibutyltin dilaurate, in combination with a Brønsted acid, e.g., sulfonic acid. The Lewis acid or base and the Brønsted acid or base is present in the catalyst system at a molar ratio of Lewis acid/base to Brønsted acid/base of 1:10 to 10:1.
Claims20
A process for crosslinking an ethylene-vinyl silane polymer, the process comprising the step of contacting the ethylene-vinylsilane polymer and water with a catalyst cure system comprising a combination of at least one Lewis acid and at least one Brønsted acid or at least one Lewis base and at least one Brønsted base.
A crosslinkable composition comprising an ethylene-vinyl silane polymer and a catalyst cure system comprising a combination of at least one Lewis acid and at least one Brønsted acid or at least one Lewis base and at least one Brønsted base.
A process for crosslinking an ethylene-vinyl silane polymer, the process comprising the step of contacting the ethylene-vinylsilane polymer and water with a catalyst cure system comprising at least one Lewis acid and at least one Brønsted acid or of at least one Lewis base and at least one Brønsted base such that the rate of cure of the ethylene-vinylsilane polymer is greater than 10 percent faster than the rate of cure of the same ethylene-vinylsilane polymer under the same conditions but with either of the Lewis acid or base or Brønsted acid or base alone.
Dependencies are inferred from the claim text.