Claims
- 1. A flame-retardant reinforced polyamide resin composition comprising (a) 30-70% by weight of a half-aromatic polyamide resin having a polyhexamethylene adipamide unit and a polyhexamethylene isophthalamide unit, (b) 10-38% by weight of a melamine polyphosphate, (c) 5-50% by weight of an inorganic reinforcing material, (d) 0-5% by weight of a polyalkylene polyhydric alcohol and/or a fatty acid ester derivative thereof, (e) 0-5% by weight of a bisamide compound, (f) 0-5% by weight of a metal oxide and/or a molybdate, and (g) 0-5% by weight of a metal salt of a higher fatty acid having 10-25 carbon atoms, where the ratio of the amounts of the half-aromatic polyamide resin (a) and the melamine polyphosphate (b) in the composition is 1.5-3.5, and the half-aromatic polyamide resin (a) is at least one polymer selected from the group consisting of (1) a copolymer comprising 70-95% by weight of a polyhexamethylene adipamide unit and 5-30% by weight of a polyhexamethylene isophthalamide unit; (2) a terpolymer comprising 60-89% by weight of a polyhexamethylene adipamide unit, 5-30% by weight of a polyhexamethylene isophthalamide unit and 1-10% by weight of an aliphatic polyamide unit other than polyhexamethylene adipamide; (3) a mixed polyamide containing 70-95% by weight of a polyhexamethylene adipamide component and 5-30% by weight of a polyhexamethylene isophthalamide component; and (4) a mixed polyamide containing 60-89% by weight of a polyhexamethylene adipamide component, 5-30% by weight of a polyhexamethylene isophthalamide component and 1-10% by weight of an aliphatic polyamide component other than polyhexamethylene adipamide.
- 2. A flame-retardant reinforced polyamide resin composition according to claim 1, wherein the amount of the polyalkylene polyhydric alcohol and/or the fatty acid ester derivative thereof (d) is 0.01-5% by weight.
- 3. A flame-retardant reinforced polyamide resin composition according to claim 2, wherein the polyalkylene polyhydric alcohol is at least one polyhydric alcohol selected from the group consisting of polyethylene glycol, polypropylene glycol and polybutylene glycol.
- 4. A flame-retardant reinforced polyamide resin composition according to claim 2, wherein the fatty acid ester derivative of the polyalkylene polyhydric alcohol is at least one higher fatty acid ester derivative of a polyhydric alcohol selected from the group consisting of polyethylene glycol monolaurate, polyethylene glycol monostearate, polyethylene glycol monooleate and polyethylene glycol distearate.
- 5. A flame-retardant reinforced polyamide resin composition according to claim 1, wherein the amount of the bisamide compound (e) is 0.01-5% by weight.
- 6. A flame-retardant reinforced polyamide resin composition according to claim 5, wherein the bisamide compound (e) is at least one saturated fatty acid bisamide selected from the group consisting of methylenebisstearic acid amide, ethylenebiscapric acid amide, ethylenebislauric acid amide, ethylenebisstearic acid amide, ethylenebisisostearic acid amide, ethylenebisbehenic acid amide, hexamethylenebisstearic acid amide and hexamethylenebisbehenic acid amide.
- 7. A flame-retardant reinforced polyamide resin composition according to claim 1, wherein the amount of the metal oxide and/or molybdate (f) is 0.01-5% by weight.
- 8. A flame-retardant reinforced polyamide resin composition according to claim 7, wherein the metal oxide is at least one alkaline earth metal oxide selected from the group consisting of beryllium oxide, magnesium oxide, calcium oxide, strontium oxide and barium oxide.
- 9. A flame-retardant reinforced polyamide resin composition according to claim 7, wherein the molybdate is at least one alkaline earth metal salt of molybdic acid selected from the group consisting of calcium molybdate, barium molybdate and strontium molybdate.
- 10. A flame-retardant reinforced polyamide resin composition according to claim 1, wherein the amount of the metal salt of higher fatty acid having 10-25 carbon atoms (g) is 0.01-5% by weight.
- 11. A flame-retardant reinforced polyamide resin composition according to claim 10, wherein the metal salt of higher fatty acid having 10-25 carbon atoms (g) is at least one alkaline earth metal salt of higher fatty acids which is selected from the group consisting of calcium salt, magnesium salt, zinc salt and aluminum salt of lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, cerotic acid, oleic acid and erucic acid.
- 12. A flame-retardant reinforced polyamide resin composition according to claim 1, wherein the melamine polyphosphate (b) contains 10-18% by weight of phosphorus atoms.
- 13. A flame-retardant reinforced polyamide resin composition according to claim 1, wherein the melamine polyphosphate (b) has an average particle diameter of 0.5-20 μm.
- 14. A flame-retardant reinforced polyamide resin composition according to claim 1, wherein the condensation degree of the melamine polyphosphate (b) is not less than 5.
- 15. A flame-retardant reinforced polyamide resin composition according to claim 1, wherein the inorganic reinforcing material (c) is at least one reinforcing material selected from the group consisting of glass fibers, wollastonite, talc, calcined kaolin and mica.
- 16. A flame-retardant reinforced polyamide resin composition according to claim 1, which is obtained by using a twin-screw extruder provided with side feed openings at two or more positions, and feeding at least the half-aromatic polyamide resin (a) from the feed opening provided at the top position of the twin-screw extruder, and the melamine polyphosphate (b) and the inorganic reinforcing material (c) from any one of the side feed openings, followed by kneading them.
Priority Claims (2)
Number |
Date |
Country |
Kind |
2001-080889 |
Mar 2001 |
JP |
|
2001-087493 |
Mar 2001 |
JP |
|
RELATED APPLICATIONS
[0001] This application is a continuation-in-part of International PCT application No. PCT/JP00/06909, filed Oct. 4, 2000 and designating the United States.
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
PCT/JP00/06909 |
Oct 2000 |
US |
Child |
10101608 |
Mar 2002 |
US |