Natural rubber treated with viscosity stabilizers and production

Details Natural rubber treated with viscosity stabilizers and production Natural rubber treated with viscosity stabilizers and production

1995-09-01

1998-01-20

Morgan, Kriellion S.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

5253284, C08K 524, C08F 830

Patent

active

057102007

ABSTRACT:
Natural rubber containing viscosity stabilizers is treated under drying conditions to result in 10% or less of the difference of gel content and 85% or more of molecular weight retention between before and after drying, and methods for manufacturing natural rubber comprise treating under drying conditions to result in 10% or less of the difference of gel content and 85% or more of molecular weight retention between before and after drying.
Natural rubber containing viscosity stabilizers is treated with a strainer, and methods for manufacturing natural rubber comprise treating with a strainer after compounding hydrazide stearate into the natural rubber.
Gelation (storage hardening) is suppressed and a decrease in molecular weight is prevented.

REFERENCES:
patent: T857036 (1968-12-01), Straley et al.
patent: 3884874 (1975-05-01), Rosenberger et al.
Schnetger, j., Lexikon der Kautschuk-Technik, pp. 635-636, 1991.

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