Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1997-09-16
1999-06-01
Szekely, Peter A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
2505151, 252478, 524406, 524408, 524431, 524439, 524440, G21F 110, C08K 310, C08K 308, C08K 322
Patent
active
059088842
ABSTRACT:
Tungsten powder which is a material of high radiation absorptivity is dispersed into unvulcanized fluoro rubber in advance so that the mixture is vulcanized and molded. As the powder of material of high radiation absorptivity, powder having an F.s.s.s. particle size not larger than 50 .mu.m is used. Further, in the case where a mixture of powder having an F.s.s.s. particle size in a range of from 5 .mu.m to 50 .mu.m, and powder having an F.s.s.s. particle size in a range of from 0.5 .mu.m, to 5 .mu.m, is used as the powder of material of high radiation absorptivity, the powder of material of high radiation absorptivity has good tensile strength, good extensibility and more excellent radiation shielding ability, when the weight of the powder having a particle size in a range of from 4 .mu.m to 100 .mu.m is in a range of from 60% by weight to 95% by weight, and the weight of the powder having a particle size smaller than 4 .mu.m is in a range of from 5% by weight to 40% by weight. Both the powder and the vulcanized rubber containing carbon powder have electrical conductivity, so that electromagnetic wave shielding ability is added. In addition, the vulcanized rubber is vulcanized fluoro rubber which is excellent in heat resistance and chemical resistance.
REFERENCES:
patent: 2944042 (1960-07-01), Anderson
patent: 3177177 (1965-04-01), Bobear
patent: 3609372 (1971-09-01), Vogel
patent: 4375523 (1983-03-01), Hatanaka et al.
patent: 4545926 (1985-10-01), Fouts, Jr. et al.
patent: 4545927 (1985-10-01), Railsback
patent: 5001354 (1991-03-01), Gould et al.
patent: 5548125 (1996-08-01), Sandbank
Adachi Toshihisa
Kawamura Toshio
Kobayashi Mitsunori
Sumitomo Electric Industries Ltd.
Szekely Peter A.
LandOfFree
Radiation shielding material and producing method thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Radiation shielding material and producing method thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radiation shielding material and producing method thereof will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-955376