Soluble mono-alkyl stannoic acid catalyst and its use in preparing high molecular weight polyesters
Patent 5891985 Issued on April 6, 1999. Estimated Expiration Date: 
October 1, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 1, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesPolybutylene terephthalate Catalyst system for preparing polyethylene terephthalate Catalyst system and process for preparing polyethylene terephthalate Process for the preparation of phenol-functional polyester resins Process for preparing high molecular weight polyesters Toner compositions with modified polyester resins Patent #: 5686218 InventorAssigneeApplicationNo. 942116 filed on 10/01/1997US Classes:528/283, Material contains a Group IVA metal atom (Ge, Sn, Pb)502/102, Plural component system comprising A - Group I to IV metal hydride or organometallic compound - and B - Group IV to VIII metal, lanthanide or actinde compound - (i.e., alkali metal, Ag, Au, Cu, alkaline earth metal, Be, Mg, Zn, Cd, Hg, Sc, Y, Al, Ga, In, Tl, Ti, Zn, Hf, Ge, Sn or Pb hydride or organometallic compound and Ti, Zr, Hf, Ge, Sn, Pb, V, Nb, Ta, As, Sb, Bi, Cr, Mo, W, Po, Mn, Tc, Re, Iron group, Platinum group, atomic number 57 to 71 inclusive or atomic number 89 or higher compound)502/150, Organic compound containing502/170, With metal carboxylate or metal compound and carboxylic acid or anhydride502/172, Alcohol, phenol, ether, aldehyde or ketone524/783, Group IV or Group IIB, i.e., Ge, Sn, Pb, Zr, Ti, Hf, Zn, Cd, Hg524/784, Tin528/271, FROM CARBOXYLIC ACID OR DERIVATIVE THEREOF528/279, Material contains a Group IVB metal atom (Ti, Zr, Hf)528/285, Material contains a Group VA metal atom (As, Sb, Bi)528/308, Aryl-containing carboxylic acid or derivative of an aryl-containing dicarboxylic acid528/308.6Contains terephthalic acid or substituted forms thereofExaminersPrimary: Acquah, Samuel A.International ClassesC08G 063/78B01J 031/00 AbstractA soluble mono-alkyl Stannoic Acid/glycol liquid phase catalyst produced from the reaction of a mono-alkyl Stannoic Acid and a glycol at a temperature of from at least 180° C., and its use in preparing high molecular weight polyester polymers.Field of SearchFROM CARBOXYLIC ACID OR DERIVATIVE THEREOFMaterial contains a Group IVB metal atom (Ti, Zr, Hf) Material contains a Group IVA metal atom (Ge, Sn, Pb) Material contains a Group VA metal atom (As, Sb, Bi) Aryl-containing carboxylic acid or derivative of an aryl-containing dicarboxylic acid Contains terephthalic acid or substituted forms thereof Group IV or Group IIB, i.e., Ge, Sn, Pb, Zr, Ti, Hf, Zn, Cd, Hg Tin Plural component system comprising A - Group I to IV metal hydride or organometallic compound - and B - Group IV to VIII metal, lanthanide or actinde compound - (i.e., alkali metal, Ag, Au, Cu, alkaline earth metal, Be, Mg, Zn, Cd, Hg, Sc, Y, Al, Ga, In, Tl, Ti, Zn, Hf, Ge, Sn or Pb hydride or organometallic compound and Ti, Zr, Hf, Ge, Sn, Pb, V, Nb, Ta, As, Sb, Bi, Cr, Mo, W, Po, Mn, Tc, Re, Iron group, Platinum group, atomic number 57 to 71 inclusive or atomic number 89 or higher compound) Organic compound containing With metal carboxylate or metal compound and carboxylic acid or anhydride Alcohol, phenol, ether, aldehyde or ketone |
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