A poly(glycolic acid) resin composition that contains a crystal nucleator suitable for promoting crystallization of a poly(glycolic acid) resin, has a high crystallization rate in comparison to the poly(glycolic acid) resin, and is capable of having higher molding processability and improving heat resistance. A poly(glycolic acid) resin composition including a poly(glycolic acid) resin and a crystal nucleator composed of a carboxylic acid derivative: B
1
-L
1
-A-L
2
-B
2
[1] wherein, A is a C
1-6
alkylene group optionally having a substituent, or a divalent C
6-10
aromatic group optionally having a substituent; B
1
and B
2
are each independently a C
3-6
cycloalkyl group optionally having a substituent, or a C
6-10
aromatic group optionally having a substituent; L
1
and L
2
are each independently —C(═O)NR
1
— (wherein, R
1
is a hydrogen atom or a C
1-6
alkyl group) or —C(═O)O—}.
Crystalline polypropylene resin composition and amide compounds
申请人:NEW JAPAN CHEMICAL CO.,LTD.
公开号:EP0557721A2
公开(公告)日:1993-09-01
Disclosed are a crystalline polypropylene resin composition comprising a crystalline polyproplylene resin and a β-nucleating agent, and a method of increasing the proportion of β-form crystals in a crystalline polypropylene resin molding comprising molding the composition, the β-nucleating agent being a diamide compound.
Porous stretched article of polypropylene-based resin and process for its preparation
申请人:NEW JAPAN CHEMICAL CO.,LTD.
公开号:EP0632095A2
公开(公告)日:1995-01-04
Disclosed are a process for producing a porous stretched article of β-crystalline polypropylene-based resin, the process comprising the steps of crystallizing a melt of a polypropylene-based resin composition at a temperature of 15 to 140°C to form a solidified product containing β-form crystals and stretching the resulting solidified product at a temprature which is higher than 20 °C but lower than the melting point of the β-form crystals in said solidified product, the polypropylene-based resin composition comprising a polypropylene-based resin and 0.0001 to 5 parts by weight, per 100 parts by weight of the polypropylene-based resin, of at least one specific amide compound; and a porous stretched article produced by the process.
Polybutene-1 resin composition and a method of accelerating the crystal transformation
申请人:NEW JAPAN CHEMICAL CO.,LTD.
公开号:EP0776933A1
公开(公告)日:1997-06-04
Disclosed are a polybutene-1 resin composition comprising a polybutene-1 resin and a Form-II to Form-I crystal transformation accelerator, and a method of accelerating the Form-II to Form-I crystal transformation comprising molding the polybutene-1 resin composition and allowing the molded product to stand at about 0 to 50 °C, the crystal transformation accelerator being an amide compound.
PROPYLENE-ETHYLENE COPOLYMER COMPOSITIONS AND PROCESS FOR THE PRODUCTION THEREOF
申请人:CHISSO CORPORATION
公开号:EP0790262A1
公开(公告)日:1997-08-20
A propylene-ethylene copolymer composition is obtained which has a good moldability and is excellent in the balance of rigidity, toughness, and impact-strength.
A propylene-ethylene copolymer composition having a melt flow rate of 10 to 300 g/10 minutes and obtained by
producing 60 to 95 % by weight, based on the weight of whole polymer, of a propylene polymer having a melt flow rate (ASTM D-1238) in the range of 100 to 1,000 g/10 minutes and having a ratio (Cf) of integrated values of the propylene polymer dissolved in o-dichlorobenzene at a temperature of lower than 112°C, and a temperature of 112°C or higher, respectively, which is an index of the stereoregurality in molecules and molecular weight distribution, when the amounts of the propylene polymer dissolved therein at each of the temperatures were determined by raising the temperature of the o-dichlorobenzene continuously or stepwise, of 0.5 or less, by carrying out polymerization of propylene in the presence of a highly stereoregular catalyst and hydrogen in a polymerization step (I), and then
producing 5 to 40 % by weight, based on the weight of whole polymer, of an ethylene-propylene copolymer by feeding ethylene and propylene to the propylene polymer produced in the polymerization step (I) to react so that the content of ethylene becomes 30 to 80 % by weight, in a polymerization step (II); and a propylene-ethylene copolymer composition comprising the composition mentioned above and a α-crystal and/or β-crystal nucleator added therewith.