Abstract: Provided is a polyoxamide resin which has excellent impact resistance and is characterized in that the polyoxamide resin is obtained from a diamine in which the diamine component has 10 to 18 carbons and in that the polyoxamide resin has a relative viscosity (?r) of 2.1 or greater as determined at 25° C. using 96% sulfuric acid as a solvent and a solution having a concentration of 1.0 g/dL, and also provided is an impact-resistant part comprising this resin. The polyoxamide resin has a higher molecular weight than a conventional polyoxamide resin, a large moldable temperature range as estimated from the difference between the melting point and the thermal decomposition temperature and therefore excellent molten moldability, and furthermore excellent impact resistance when compared to a conventional aliphatic polyoxamide resin without losing the low water absorbency, chemical resistance, hydrolysis resistance, high elasticity, and high strength seen with aliphatic straight-chain polyoxamide resins.

Abstract: A molding material for fuel parts (particularly a molding material for fuel parts of automobiles), ensuring excellent fuel barrier property against not only gasoline fuel, but also an alcohol mixed fuel, is provided. A molding material for fuel parts and a fuel part, comprising a polyamide containing an oxamide bond unit represented by —NH—R—NHC(?O)C(?O)—.

Abstract: There is provided a polyamide resin that can achieve a sufficiently high molecular weight compared to conventional polyamide 92, has a broad moldable temperature range or width estimated from a difference between melting point and thermal decomposition temperature, exhibits excellent melt moldability and has excellent chemical resistance and hydrolysis resistance compared to conventional aliphatic polyamide resins without impairing low water absorption property of an aliphatic linear polyoxamide resin. A polyamide resin in which the dicarboxylic acid component is oxalic acid and the diamine component is a diamine component composed of 1,9-nonanediamine and 2-methyl-1,8-octanediamine, with the molar ratio between 1,9-nonanediamine and 2-methyl-1,8-octanediamine being from 6:94 to 99:1.

Abstract: A method of producing a polyoxalate resin including polycondensing a dialkyl oxalate represented by formula (2): wherein R represents an alkyl group having 1 to 4 carbon atoms, with a saturated aliphatic diol represented by formula (3): HO-A-OH, wherein A represents a divalent saturated aliphatic hydrocarbon group having 3 to 12 carbon atoms, in which polycondensation reaction product, the molar amount of the dialkyl oxalate [M1] and the molar amount of the saturated aliphatic diol [M2] satisfy relationship (I): 0.5?[M2]/[M1]<1 while controlling the total content of water in the starting reaction mixture to 2,000 ppm or less.

Abstract: A biodegradable polyoxalate resin having a high melt-formability by the formula: X?O-A-O—CO—CO?nY in which A=C3-C12 divalent aliphatic hydrocarbon group, X=H; R—OCOCO— or OHC— group, Y=—OR, —OAOH or —OAOCHO when X=H—, or —OR or —OAOCHO when X=R—OCOCO— or OHC—, R=C1-C4 alkyl, and is usable in a resinous composition with a poly(lactic acid) resin.

Abstract: Disclosed is a member of nylon 12 having a relative viscosity of from 1.9 to 3.5 when measured in 98% sulfuric acid at a concentration of 10 g/dm3 and at 25° C. and a melt flow rate of 0.1 g/10 min. or more when measured at 235° C. under a load of 2,160 g, wherein said relative viscosity and said melt flow rate have a relationship of the following formula (I): 2.87×103 exp (−3.48 &eegr;r)≦MFR≦3.25×104 exp (−3.48 &eegr;r)  (I) wherein &eegr;r is relative viscosity and MFR is melt flow rate. The nylon 12 has excellent extrusion moldability and creep characteristics, fatigue characteristics and the like mechanical properties and is suited for tubular molds. A nylon 12 composition comprising the nylon 12 having the above-described specific relationship between &eegr;r and MFR and a plasticizer is also disclosed.

Abstract: Disclosed is a member of nylon 12 having a relative viscosity of from 1.9 to 3.5 when measured in 98% sulfuric acid at a concentration of 10 g/dm3 and at 25° C. and a melt flow rate of 0.1 g/10 min. or more when measured at 235° C. under a load of 2,160 g, wherein said relative viscosity and said melt flow rate have a relationship of the following formula (I): 2.87×103 exp(−3.48 &eegr;r)≦MFR≦3.25×104 exp(−3.48 &eegr;r)  (I) wherein &eegr;r is relative viscosity and MFR is melt flow rate. The nylon 12 has excellent extrusion moldability and creep characteristics, fatigue characteristics and the like mechanical properties and is suited for tubular molds. A nylon 12 composition comprising the nylon 12 having the above-described specific relationship between &eegr;r and MFR and a plasticizer is also disclosed.

Abstract: Disclosed is a member of nylon 12 having a relative viscosity of from 1.9 to 3.5 when measured in 98% sulfuric acid at a concentration of 10 g/dm3 and at 25° C. and a melt flow rate of 0.1 g/10 min. or more when measured at 235° C.

Abstract: Disclosed is a member of nylon 12 having a relative viscosity of from 1.9 to 3.5 when measured in 98% sulfuric acid at a concentration of 10 g/dm3 and at 25° C. and a melt flow rate of 0.1 g/10 min. or more when measured at 235° C.

Abstract: Disclosed is a member of nylon 12 having a relative viscosity of from 1.9 to 3.5 when measured in 98% sulfuric acid at a concentration of 10 g/dm3 and at 25° C. and a melt flow rate of 0.1 g/10 min. or more when measured at 235° C. under a load of 2,160 g, wherein said relative viscosity and said melt flow rate have a relationship of the following formula (I): 2.87×103 exp (−3.48 &eegr;r)≦MFR≦3.25×104 exp (−3.48 &eegr;r)  (I) wherein &eegr;r is relative viscosity and MFR is melt flow rate. The nylon 12 has excellent extrusion moldability and creep characteristics, fatigue characteristics and the like mechanical properties and is suited for tubular molds. A nylon 12 composition comprising the nylon 12 having the above-described specific relationship between &eegr;r and MFR and a plasticizer is also disclosed.