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US 5,510,237 AGranted
Serum and plasma separating compositions and blood testing containers
AssigneeSekisui Chemical Co., Ltd.
InventorsHironobu Isogawa, Hideo Anraku
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AssigneeSekisui Chemical Co., Ltd.
InventorsHironobu Isogawa, Hideo Anraku
Estimating the term…
The invention provides a serum or plasma separating composition which comprises a cyclopentadiene resin, a viscosity adjusting agent and an organic gelling agent. The composition is characterized in that the cyclopentadiene resin is a liquid resin at a temperature of 25.degree. C., the viscosity adjusting agent being a liquid ester obtained from propionic acid, butyric acid, benzoic acid or phthalic acid, the organic gelling agent being a condensation product of sorbitol and an aromatic aldehyde, the composition containing 0.8 to 25 parts by weight of the viscosity adjusting agent and 0.03 to 0.9 part by weight of the organic gelling agent per 100 parts by weight of the cyclopentadiene resin. The composition forms a satisfactory separating layer even when subjected to a centrifugal separation operation at a set temperature of 4.degree. C.
A serum or plasma separating composition comprising a cyclopentadiene resin, a viscosity reducing agent and an organic gelling agent, the cyclopentadiene resin being a liquid resin at a temperature of 25.degree. C., the viscosity reducing agent being a liquid ester prepared by reacting an alcohol with an acid selected from the group consisting of propionic acid, butyric acid, benzoic acid and phthalic acid, the organic gelling agent being a condensation product of sorbitol and an aromatic aldehyde, the composition containing 0.8 to 25 parts by weight of the viscosity reducing agent and 0.03 to 0.9 part by weight of the organic gelling agent per 100 parts by weight of the cyclopentadiene resin.
A serum or plasma separating composition comprising a cyclopentadiene resin, a viscosity reducing agent, an organic gelling agent and a gamma-ray stabilizer, the cyclopentadiene resin being a liquid resin at a temperature of 25.degree. C., the viscosity reducing agent being a liquid ester prepared by reacting an alcohol with an acid selected from the group consisting of propionic acid, butyric acid, benzoic acid and phthalic acid, the organic gelling agent being a condensation product of sorbitol and an aromatic aldehyde, the gamma-ray stabilizer being a mixture of a phenolic antioxidant, a photostabilizer and a phosphite antioxidant, the composition containing 0.8 to 25 parts by weight of the viscosity reducing agent, 0.03 to 0.9 part by weight of the organic gelling agent and 1.32 to 7.7 parts by weight of the gamma-ray stabilizer per 100 parts by weight of the cyclopentadiene resin.
Dependencies are inferred from the claim text.