ALIPHATIC POLYESTER-BASED POLYMER AND ITS PRODUCTION

    公开(公告)号:JP2001019747A

    公开(公告)日:2001-01-23

    申请号:JP19378899

    申请日:1999-07-07

    Abstract: PROBLEM TO BE SOLVED: To produce the subject polymer having the melting temperature to a practically sufficient extent and capable of exhibiting an excellent color tone and an excellent mechanical strength by including plural specific ester parts and further a silicon-containing connecting group derived from a silicon compound in a specific proportion. SOLUTION: This polymer comprises an ether group-containing ester group represented by formula I (R5 is a 1-10C ether group-containing bifunctional aliphatic group; R6 is a 4-12C ether-containing bifunctional aliphatic group; t is 0 or 1) and at least one kind of ester part selected from an oxycarboxylic acid ester part represented by formula II (R3 is a 1-12C bivalent aliphatic group) and a carbonic acid ester part represented by formula III and further a silicon- containing connecting group derived from a silicon compound having a silicon bond represented by SiOR (R is H or an organic group) or forming the silicon bond during a reaction in an amount of 1×107 to 0.1 molar fraction based on the total ester groups in the molecular chain. The polymer is capable of exhibiting biodegradability and chemical recyclability.

    GELATINIZER
    23.
    发明专利

    公开(公告)号:JP2000087006A

    公开(公告)日:2000-03-28

    申请号:JP25962898

    申请日:1998-09-14

    Abstract: PROBLEM TO BE SOLVED: To obtain a gelatinizer having biodegradability and high safety to living organism by reacting spiculisporic acid with a basic compound to produce a neutral salt. SOLUTION: This gelatinizer comprises a compound represented by the formula (wherein X is mutually same or different from each other and a metal atom or a group selected from the group consisting of an alkaline earth metal, Li, Al and an arginine residue; and (n) is 1 or 2). The galatinizer is usually used as an aqueous solution. The concentration of the compound of the formula in the aqueous solution is preferably 20 wt.% or below, more preferably 0.5-10 wt.%. To spiculisporic acid [(4S,5S)-4,5-dicarboxyl-4-pentadecanolide] is added an aqueous solution of a basic compound in excess of a calculated amount, and the resulting product is heated to obtain the compound of the formula which has the structure of ring operating of a lactone ring. An oil phase component and alcohol capable of gelation using this gelatinizer are monovalent alcohol, polyvalent alcohol, oil such as hydrocarbons, or the like.

    ALIPHATIC POLYESTER FILM AND PRODUCTION THEREOF

    公开(公告)号:JPH11172021A

    公开(公告)日:1999-06-29

    申请号:JP36367797

    申请日:1997-12-16

    Abstract: PROBLEM TO BE SOLVED: To provide a polymer film which mainly comprises polybutylene succinate and has a good transparency and mechanical strength. SOLUTION: An aliphatic polyester film is a film which comprises an aliphatic polyester containing an ester bond of the formula: -[O(CH2 )4 OCO(CH2 )2 CO]- as a main component at the principal chain and has a sonic elastic modulus at 25 deg.C of 1.5 GPa or larger and a haze value of 40% or smaller. The aliphatic polyester film is produced by molding an aliphatic polyester containing the ester bond represented by the formula as a main component at the principal chain into a film form, and rolling the obtained film at a temperature higher than the glass transition temperature of the aliphatic polyester but lower than the melting point thereof, to obtain a film having a sonic elastic modulus at 25 deg.C of 1.5 GPa or larger and a haze value of 40% or smaller.

    HIGH-MOLECULAR-WEIGHT ALIPHATIC COPOLYESTER AND ITS PRODUCTION

    公开(公告)号:JPH08311181A

    公开(公告)日:1996-11-26

    申请号:JP14543895

    申请日:1995-05-19

    Abstract: PURPOSE: To obtain a biodegradable aliphatic copolymer having moldability and processability. CONSTITUTION: This biodegradable high-molecular weight aliphatic copolymer comprises an ester part shown by the general formula (OC-R1 -COO-R2 -O)p (R1 is a 1-12C bifunctional aliphatic group; R2 is a 2-12C aliphatic group; (p) is a molar fraction) and an ester part of the general formula (OC-R3 -O)q (R3 is a 1-10C bifunctional aliphatic group; q is a molar fraction), has a p value of 0.02-0.30 and 15,000-80,000 number-average molecular weight and is obtained by subjecting (A) an aliphatic dicarboxylic acid or an aliphatic dicarboxylic acid diester, (B) an aliphatic diol and (C) a hydroxycarboxylic acid, a hydroxycarboxylic acid ester or a lactone to polycondensation in the presence of a catalyst.

    PRODUCTION OF 4C-DICARBOXYLIC DI-LOWER ALKYL ESTER

    公开(公告)号:JPH0827062A

    公开(公告)日:1996-01-30

    申请号:JP19196494

    申请日:1994-07-22

    Abstract: PURPOSE:To obtain the subject compound under mild conditions in high yield in a significantly advantageous way in terms of cost, by using, as catalyst, a complex composed of cobalt carbonyl and a pyridine base so as to enable both the catalyst and solvent used in the reaction to be easily circulated and reused. CONSTITUTION:This compound is obtained by reaction between (A) an acrylic lower alkyl ester, (B) hydrogen-contg. carbon monoxide and (C) a lower saturated aliphatic monohydric alcohol in (D) a solvent, a mixture of (1) an aromatic hydrocarbon and (2) a saturated aliphatic hydrocarbon in the presence of (E) a catalyst, a complex composed of (3) cobalt carbonyl and (4) a pyridine base. It is preferable that the resultant reaction liquor is cooled to enough low temperatures to cause phase separation of the component (E) in the liquor; this component (E) is separated as a catalytic liquor and reused as a catalyst for the reaction; the component (D) is a mixture at the weight ratio (1)/(2) of 1:(1.5-10), and the component (4) is a 3-alkylpyridine.

    ORGANIC MAGNETIC BODY AND ITS MANUFACTURE

    公开(公告)号:JPH06124826A

    公开(公告)日:1994-05-06

    申请号:JP18021391

    申请日:1991-06-25

    Abstract: PURPOSE:To provide a stable organic magnetic body which is easily manufactured, having high saturation magnetization, by making it consist of a carbide in which an organic compound, composition ratio of hydrogen and carbon is specific value, is on the progress to graphite, and further, hydrogen atom of the specific percentage is contained. CONSTITUTION:An amorphous carbide of organic compound, on the progress to graphite, in which composition ratio of hydrogen and carbon is 1.7 or more is manufactured. The carbide contains 1-50 hydrogen atoms per 100 carbon atoms. The organic compound, here, is aliphatic hydrocarbon or cycloparaffin, or, crown compound, aza compound, or alkylamine. So the organic magnetic body, consisting of amorphous carbide of specific compound, is, in addition to its light weight, stable and easy in manufacture, and it is capable of having high saturation magnetization.

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