Solvent fractionation of guayule rubber

Details Solvent fractionation of guayule rubber Solvent fractionation of guayule rubber

1985-07-15

1986-11-18

Foelak, Morton

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

Guayule rubber

528933, C08C 400

Patent

active

046237135

ABSTRACT:
A method and composition are disclosed wherein guayule rubber is fractionated into desirable weight average molecular weight fractions by a desired solvent system. Oftentime, a plurality of fractionating steps is utilized wherein the desirable molecular weight rubber fraction is precipitated or extracted. High weight average molecular weight rubbers having usually less than 4% by weight of resin content therein are generally desirable because of their favorable physical properties.

REFERENCES:
patent: 2390860 (1945-12-01), Williams
patent: 2572046 (1950-06-01), Meeks et al.
patent: 2618670 (1952-11-01), Clark
patent: 4376835 (1983-08-01), Kay et al.
patent: 4405532 (1983-09-01), Gutierrez et al.
patent: 4435337 (1984-03-01), Kay et al.
patent: 4526959 (1985-07-01), Kay et al.

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