Process for increasing the melt viscosity and/or melt elasticity

Details Process for increasing the melt viscosity and/or melt elasticity Process for increasing the melt viscosity and/or melt elasticity

1988-11-03

1990-03-06

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

524136, 525419, 528487, C08G 6948

Patent

active

049067087

ABSTRACT:
A process for decreasing the melt index and increasing the melt viscosity and melt elasticity of polyamide by adding thereto an effective amount of an aryl phosphoryl azide compound as for example diphenyl phosphoryl azide, and thereafter heating the composition until the desired changes in melt index, melt viscosity and melt elasticity are attained.

REFERENCES:
patent: 3509107 (1970-04-01), Brignac
patent: 3551548 (1970-12-01), Brignac et al.
patent: 3763113 (1973-10-01), Barrows et al.
patent: 4390667 (1983-06-01), Aharoni et al.
patent: 4417031 (1983-11-01), Aharonie et al.
patent: 4417032 (1973-11-01), Khanna et al.
Nishi Noro et al., "Polymerization of Amino-acids or Peptides with Diphenyl Phosphoryl Azide (DPPA)", Int. J. Biol. Macromol., vol. 2, p. 53, 1980.
Shiori, Takayuki, "Doiphenylphosphoryl Azide, A New Convenient Reagent for a Modified Curtius Reaction and for the Peptide Synthesis", J. of the American Chemical Society, vol. 94, pp. 6203-6205, (1972).

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