Melt-blended resin composition of hydrolyzed ethylene/vinyl acet

Details Melt-blended resin composition of hydrolyzed ethylene/vinyl acet Melt-blended resin composition of hydrolyzed ethylene/vinyl acet

1981-04-02

1982-09-14

Seccuro, Carman J.

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

Synthetic resins

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

428500, 428515, 525 60, C08L 2326, C08L 2902

Patent

active

043496440

ABSTRACT:
A melt-blended composition containing at least two kinds of hydrolyzed ethylene-vinyl acetate copolymers having a different ethylene content from each other within the range of 20 to 55% by mole, a degree of hydrolysis in vinyl acetate component of at least 80% by mole and a specific melt tension as defined herein, the hydrolyzed copolymers included in the largest amount and the second largest amount among the hydrolyzed copolymers constituting the composition having a specific relationship with each other in weight ratio and ethylene content and the fusion curve of the composition indicating substantially single peak. The composition has an improved melt-moldability, and provides molded articles having remarkably reduced fish eyes and uniform thickness or excellent dimensional stability.

REFERENCES:
patent: 3975463 (1976-08-01), Hirata et al.
patent: 4228250 (1980-10-01), Pritchett

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