Process for preparing soft transparent polyether polyester block

Details Process for preparing soft transparent polyether polyester block Process for preparing soft transparent polyether polyester block

1975-12-15

1978-03-28

De Benedictis, Sr., Thomas

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 457R, 260 457S, 260 4575R, 260 4575K, 260 4575T, 260 4575F, 260 4575V, 260 4575W, 260 458R, 260 459R, 260 4595R, 260876B, C08L 6702

Patent

active

040814947

ABSTRACT:
In a process for preparing soft polyesters which comprises reacting (A) terephthalic acid and/or its ester-forming derivative, (B) tetramethylene glycol and/or its ester-forming derivative and (C) a poly(oxyalkylene) glycol having a molecular weight of 500 to 5,000 and a ratio of the number of carbon atoms to that of oxygen atoms of 2 to 4.5, the improvement wherein after the reduced viscosity of the reaction product of the components (A), (B) and (C) has reached 0.1 (dl/g), the reaction product is further reacted with (D) a low-molecular-weight ester compound and/or a high-molecular-weight ester compound containing a terephthalic acid residue and an ethylene glycol residue or a low-molecular-weight ester compound and/or a high-molecular-weight ester compound containing a terephthalic acid residue and a 1,4-cyclohexane dimethanol residue to form a polyester-polyether block copolymer.

REFERENCES:
patent: 3662024 (1972-05-01), Greene
patent: 3663658 (1972-05-01), Scardiglia et al.
patent: 3839171 (1974-10-01), Akamatsu et al.
patent: 3849515 (1974-11-01), Muller
patent: 3896098 (1975-07-01), Lasher
patent: 3917743 (1975-11-01), Schroeder et al.
patent: 3935166 (1976-01-01), Kanai et al.

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