CAS: 23850-94-4; Butyltin Tris(2-Ethylhexanoate)

专利信息

专利号:WO-2024213675-A1
优先权日:2023-04-13
标题:Process for the synthesis of a glycerol polyester
发明人：SUTTER MARC; DRONET SÉVERIN
权利人:MICHELIN & CIE
摘要:The invention relates to a process for preparing a polyester of a glycerol and a carboxylic diacid, comprising (a) bringing the monomers comprising at least the glycerol and a carboxylic diacid into contact in the presence of water, at a temperature of less than 100°C in an inert atmosphere, with a glycerol/carboxylic diacid molar ratio ranging from 0.5/1 to 10/1; (b) esterification in an inert atmosphere at a temperature above 110° C; (c) vacuumizing the reaction medium at a pressure of less than 100 mbara and at a temperature above 110° C; and (d) maintaining the vacuum and a temperature higher than 110°C in order to perform a polycondensation process, which method comprises the introduction of a polycondensation catalyst at the end of the esterification of step (b), before the vacuumizing of step (c) or after the vacuumizing of step (c), in an amount of less than or equal to 5000 ppm relative to the total mass of monomers, said catalyst being a tin-based food-grade catalyst selected from organotin compounds having a carboxyl function (-C(O)OH), organotin compounds having a (-Sn(O)OH) function, and monobutyltin tris(2-ethylhexanoate). Such a process makes it possible in particular to synthesize a glycerol polyester having a residual monomer content of less than 5% by weight of the weight of the polymer, a high number-average molar mass Mn of greater than 2500 g/mol, a dispersity (Mw/Mn) of less than or equal to 10, and less than 15 mol % of units (1,2,3-triacylglyceride) relative to all the units of the polymer.

专利号:US-2005187374-A1
优先权日:2004-02-20
标 题:Polyester synthesis with enhanced titanium catalyst composition
发明人：CHEN BIN; DOWLING CONOR M; SESHADRI SRI R
摘要:A catalyst composition for preparing polyesters comprises a titanium compound and one or more catalyst enhancers. The titanium compound may be either a titanyl compound of the formula X m TiOY o or a titanium salt of the formula X m TiY o , where each X is independently selected from the group consisting of H, Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba and ammonium; m=0, 1 or 2; Y is a ligand of the formula C a H b O c , wherein a=1 to 30, b=0 to 60, and c=1 to 10; and o=2, 3, or 4. The catalyst enhancer may be selected from either or both of two classes: 1) compounds selected from the group consisting of oxalate and C1-C26 carboxylate salts of Li, Na, K, Rb, Cs, Be, Ca, Mg, Sr, and Ba; and 2) compounds selected from the group consisting of soluble compounds of Al, Co, Zn, and Sn.