Water-stable catalysts for polyurethane manufacture

US8829145B2 · kind B2 · utility

Assignee

• Dorf Ketal Chemicals (India) Private Limited · IN

Inventors

• Arran Alexander Dickon Tulloch · Ripon, GB
• David Jenkins · Knoxville, US
• Joseph G. Atkinson · Montréal, CA
• Mark Alexander Kent · Sunnyvale, US
• Alan Thomas Cooper · Peterlee, GB

Key dates

• Filing date: Jun 16, 2008
• Grant date: Sep 9, 2014
• Expiry date: Sep 26, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2110/0083
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method of manufacturing a polyurethane compound comprises mixing together a polyol, a polyisocyanate compound and a catalyst and allowing the mixture to cure to form a polyurethane, and is characterized in that the catalyst is a neutral complex of a metal selected from Ti, Zr, Hf, Al, Fe, Bi or Sn and a multidentate organic ligand having: a) a number of anionic donor sites=x; b) a number of neutral donor sites, capable of forming a co-ordinate bond with the metal, =y; c) where x+y=from 5 to 8; d) x is from 2 to 4; e) the ligand molecule is of a size and conformation to enable each of the anionic donor sites and neutral donor sites to form a bond with the same metal atom.