Resin composition for press foaming, foam and process for...

Details Resin composition for press foaming, foam and process for... Resin composition for press foaming, foam and process for...

2007-09-24

2011-10-18

Gulakowski, Randy (Department: 1766)

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

Synthetic resins

Cellular products or processes of preparing a cellular...

C521S142000, C526S348000, C526S160000

Reexamination Certificate

active

08039523

ABSTRACT:
A resin composition for pressure-foam molding, which comprises an ethylene-based copolymer and a foaming agent, wherein the ethylene-based copolymer has monomer units derived from ethylene and monomer units derived from an a-olefin having 3 to 20 carbon atoms, has a melt flow rate of 0.01 to 0.7 g/10 minutes, a molecular weight distribution of 5 or more determined by a gel permeation chromatography, an activation energy of flow of 40 kJ/mol or more, and inflection points of 3 or less on a melting curve within temperature range from 25° C. to the end point of melting obtained by a differential scanning calorimetry; a foam obtained by press foaming; and a process for producing the foam.

REFERENCES:
patent: 2004/0261297 (2004-12-01), Park
patent: 2007/0100106 (2007-05-01), Iseki et al.
patent: 3-2657 (1991-01-01), None
patent: B-302657 (1991-01-01), None
patent: 2005-314638 (2005-11-01), None
patent: 2005-314638 (2005-11-01), None
patent: A-2005-314638 (2005-11-01), None

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