Thermally stabilized segmented copolyester adhesive

Details Thermally stabilized segmented copolyester adhesive Thermally stabilized segmented copolyester adhesive

1975-11-21

1977-09-13

Schain, Howard E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

156332, 260 26, 260 28R, 260 285AS, 260 457R, 260 457P, 260 4585, 260 459R, 260 459P, 260 4595R, 260 75T, 260829, 260843, 260860, 260873, C08K 322, C08L 6700, C08L 9100

Patent

active

040481280

ABSTRACT:
Thermally stabilized thermoplastic segmented copolyester of recurring short chain ester units and long chain ester units joined through ester linkages, having a melt index of less than 150 and a melting point of at least 90.degree. C., an inherent viscosity in the range of 1.0 to 1.7 and an acid number not greater than 3, stabilized with 0.05 to 3.0 percent by weight, based on the weight of copolyester, of an alkaline earth oxide. Improved stabilizing effect can be achieved when 0.25 to 2.5 percent by weight, based on the weight of copolyester, of the alkaline earth oxide is used in conjunction with 0.25 to 2.5 percent by weight, based on the weight of copolyester, of a substantially linear polycarbodiimide. Additional optional materials that can be added with the stabilizer, based on the weight of copolyester, include: 0.25 to 5.0 percent by weight of a compound taken from the group consisting of hindered phenols, nitrogen-containing hindered phenols and hindered secondary amines; 0.25 to 5.0 percent by weight of a thioalkylpropionate ester of 12 to 18 carbon atoms; 0.25 to 5.0 percent by weight of a phosphorous acid ester; or mixtures thereof. A useful stabilized adhesive composition comprises (A) 1 to 99 percent by weight of segmented copolyester, (B) 1 to 99 percent by weight of a compatible low molecular weight thermoplastic resin, and (C) 0.1 to 4.0 percent by weight, based on the weight of copolyester and resin of the alkaline earth oxide, preferably calcium oxide, stabilizer.

REFERENCES:
patent: 3193522 (1965-07-01), Neumann et al.
patent: 3219604 (1965-11-01), Fischer
patent: 3431320 (1969-03-01), Baum et al.
patent: 3465061 (1969-09-01), Fekete et al.
patent: 3663653 (1972-05-01), Frohlich et al.
patent: 3740372 (1973-06-01), Baum et al.
patent: 3832314 (1974-08-01), Hoh et al.
patent: 3844995 (1974-10-01), Kloker et al.
patent: 3909333 (1975-09-01), Eastman
patent: 3969294 (1976-07-01), Papouchado
Warner, 28th Annual Technical Conference, 1973 Reinforced Plastics/Composites Institute The Society of the Plastics Industry, Inc., Sec. 19-E, pp. 1-12.

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