Irradiation sterilization of semi-crystalline polymers

Details Irradiation sterilization of semi-crystalline polymers Irradiation sterilization of semi-crystalline polymers

1976-11-10

1978-08-29

Richman, Barry S.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

21 54R, 128224, 195127, 20415914, 20415918, 250492R, 260 457R, 260 4585R, C08F 254, C08F 818, A61L 100, C08J 328

Patent

active

041101855

ABSTRACT:
An article of a semi-crystalline polymer such as polypropylene, is sterilized by high energy irradiation, with the polymer containing a non-crystalline mobilizing additive which increases the free volume of the polymer, to thereby prevent embrittlement of the polymer during and subsequent to the irradiation. The additive has a density of from 0.6 to 1.9 g/cm.sup.3 and a molecular weight from 100 to 10,000 g/mole.

REFERENCES:
patent: 3362897 (1968-01-01), Lawton
patent: 3537967 (1970-11-01), Kelley et al.
patent: 3579303 (1971-05-01), Pickering
patent: 3758273 (1973-09-01), Johnston et al.
patent: 3940325 (1976-02-01), Hirao
patent: 3989611 (1976-11-01), Shurpik

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