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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Применить Всего найдено 3. Отображено 3.
01-02-1994 дата публикации

HEAT STABILIZATION METHOD FOR AROMATIC POLYCARBONATE

Номер: JP0006025262A
Принадлежит:

PURPOSE: To obtain new silicon compds. which protect a polycarbonate from yellowing under the effect of heat and maintain high light transmittance of the polycarbonate even after heat aging over a long period of time. CONSTITUTION: The objective silicon compd. are shown by formulae I-III (where X is H (only in the formula I), 1-20C alkyl, aryl or the like; Y is H, 1-20C alkyl, 1-20C alkyl ether, aryl or the like; Z is phenyl or 1-10C alkyl; and (n), (m) and (o) are each 1-100) such as the compd. of formula IV. The compd. of the formula III is obtd. by dissolving 1-methoxy-2-propanol in toluene, adding triethylamine, dropping phenyltrifluorosilane and bringing them into a reaction. COPYRIGHT: (C)1994,JPO ...

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05-04-1994 дата публикации

GAMMA RADIATION STERILIZABLE POLYCONDENSATE

Номер: JP0006093192A
Принадлежит:

PURPOSE: To effectively stabilize against damages such as color change due to gamma-radiation and/or ionizing radiation such as electron beam by blending a specified amount of a specified stabilizer to a thermoplastically moldable arom. polycondensate. CONSTITUTION: A reagent selected from oligocarbonates, polycarbonates, copolycarbonates, polyestercarbonates, etc., contg. structural units of a compd. of formula I or formula II (R1 to R10 are each H, OH, SH, O-alkyl, S-alkyl, O-aryl, S-aryl, COOH, COOalkyl, COOaryl, COalky, COaryl or the like; X is NH, PH, O, S, S2 or the like) is prepared. Relative soln. viscosity of oligocarbonates should be about 1.01-1.17, and relative soln. viscosity of polycarbonates should be 1.17-1.6. Then, the reagent is blended with a thermoplastically moldable aromatic polycondensate (such as an arom. polycarbonate) in an amount enough to stabilize against ionizing radiation. COPYRIGHT: (C)1994,JPO ...

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06-09-1994 дата публикации

RADIATION-RESISTANT POLYCARBONATE

Номер: JP0006248170A
Принадлежит:

PURPOSE: To enable a composition stabilized against γ-rays to be applied to the manufacture of medical equipment. CONSTITUTION: A composition contains an aromatic polycarbonate and (I) 0.001-5 wt.% dialkyl and/or dicycloalkyl monosulfide or polysulfide and, optionally, (ii) 0.001-2 wt.% aliphatic or cycloaliphatic monoalcohol or polyalcohol or derivative thereof, said percent being relative to 100 wt.% aromatic polycarbonate. COPYRIGHT: (C)1994,JPO ...

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