Method for cross-linking isotactic polymers in the presence...

Details Method for cross-linking isotactic polymers in the presence... Method for cross-linking isotactic polymers in the presence...

2007-07-10

2007-07-10

Choi, Ling-Sui (Department: 1713)

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

Synthetic resins

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

C525S345000, C525S343000, C525S348000

Reexamination Certificate

active

11192890

ABSTRACT:
A method for making isotactic polymer using a cross-linking agent entails introducing the cross-linking agent to a polymer and an accelerator. The cross-linking agent includes a peroxide and a sulfur. The peroxide has an activity ranging from about 40% to about 100%. The ratio of the accelerator to sulfur or peroxide ranges from 1:4 to 1:10 depending on the activity of the peroxide. The method further entails shearing the polymer in a high shear rate mixer and initiating cross-linking with the peroxide, wherein the accelerator partially inhibits the cross-linking of the peroxide. The method ends by forming macro radicals during the cross-linking; and forming macromolecular chains of polymer with sulfur bridges without the need for high torque. The accelerator ensures that the cross-linking and the formation of sulfur bridges occur simultaneously.

REFERENCES:
patent: 3012016 (1961-12-01), Kirk, Jr.
patent: 3143584 (1964-08-01), Roberts
patent: 3256366 (1966-06-01), Corbelli
patent: 3258447 (1966-06-01), Matteucci
patent: 3336254 (1967-08-01), White
patent: 3546326 (1970-12-01), Bittscheidt et al.
patent: 3575920 (1971-04-01), Ballini
patent: 3668192 (1972-06-01), Seifert et al.
patent: 3806558 (1974-04-01), Fischer
patent: 4104210 (1978-08-01), Coran
patent: 989372 (1965-04-01), None

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