Vulcanized rubber molded product, method of producing the...

Details Vulcanized rubber molded product, method of producing the... Vulcanized rubber molded product, method of producing the...

2011-03-15

2011-03-15

Zemel, Irina S (Department: 1765)

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

Synthetic resins

Cellular products or processes of preparing a cellular...

C521S078000, C521S089000, C521S142000, C525S331900, C264S345000, C264S347000

Reexamination Certificate

active

07906560

ABSTRACT:
The present invention provides a vulcanized foamed rubber molded product which has surface smoothness equal to or higher than that of a non-foamed vulcanized rubber molded product, has excellent mechanical strength properties, compression set resistance and abrasion resistance and a non-foamed vulcanized rubber molded product which is superior in surface smoothness to a conventional non-foamed vulcanized rubber molded product and has excellent compression set resistance, mechanical strength properties and abrasion resistance, as well as a method of producing the same. The molded product of the present invention is characterized in that the amount of sulfur atoms present in the surface thereof is at least 1.2 times as high as the amount of sulfur atoms present in a cut face obtained by cutting the surface to a depth of 1.0 mm in the vertical direction. The method of producing comprises allowing droplets or spray of a liquid containing an elementary substance consisting of a non-oxygen element in the group VI in the periodic table to adhere to the surface of a non-vulcanized rubber composition containing an elemental sulfur and/or a sulfur compound as a crosslinking agent, and then vulcanizing or vulcanizing and foaming the composition.

REFERENCES:
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