Soil release composition

Details Soil release composition Soil release composition

C - Chemistry, Metallurgy

11

D

134/3.3

C11D 3/37 (2006.01) C08G 63/672 (2006.01) C08G 63/82 (2006.01) C08G 81/00 (2006.01) C11D 17/00 (2006.01)

Patent

CA 1317186

R-4356 SOIL RELEASE PROMOTING PET-POET COPOLYMER, METHOD AGLER OF PRODUCING SAME AND USE THEREOF IN DETERGENT COMPOSITION HAVING SOIL RELEASE PROMOTING PROPERTY ABSTRACT OF THE DISCLOSURE A soil release promoting copolymer of polyethylene terephthalate and polyoxyethylene terephthalate (PET-POET) having a weight average molecular weight in the range of 15,000 to 35,000, and a PET:OET molar ratio of about 2-1 to 6:1, is prepared by reacting polyethylene terephthalate with polyethylene glycol in the presence of a catalyst system including both antimony trioxide and calcium acetate or both titanium iso- propoxide and sodium isopropoxide. The PET-POET copolymer provides improved soil release properties for oily and greasy stains from polyester fabrics at high and low wash temperatures and is stable even at high alkalinity levels. The starting PET can advantageously be obtained from scrap bottles.

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