Resin composition for sliding member, and sliding member

Abstract

A resin composition for sliding members which comprises 1 to 10 wt. % hydrocarbon wax, 0.1 to 3 wt. % at least one member selected from the group consisting of phosphates, sulfates, and carbonates, 1 to 20 wt. % phenoxy resin, 0.1 to 5 wt. % compatibilizing agent, and a polybutylene terephthalate resin as the remainder; and a sliding member obtained by molding the resin composition. The resin composition for sliding members and the sliding member obtained by molding the resin composition have excellent frictional and wearing properties even when a soft metal, e.g., an aluminum alloy, is used as a mating material.

1 . A resin composition for sliding member, comprising 1 to 10% by weight of at least one compound selected from the group consisting of a phosphate, a sulfate and a carbonate, 1 to 20% by weight of a phenoxy resin, 0.1 to 5% by weight of a compatibilizing agent, and the balance of a polybutylene terephthalate resin.  
   
   
       2 . A resin composition for sliding member according to  claim 1 , further comprising 1 to 15% by weight of an aromatic polyamide resin or an aromatic polyester resin.  
   
   
       3 . A resin composition for sliding member according to  claim 1 , wherein the hydrocarbon-bases wax is a paraffin wax, a polyethylene wax or a microcrystalline wax.  
   
   
       4 . A resin composition for sliding member according to  claim 1 , wherein the phosphate is trilithium phosphate, the sulfate is barium sulfate, and the carbonate is lithium carbonate or calcium carbonate.  
   
   
       5 . A resin composition for sliding member according to  claim 1 , wherein the compatibilizing agent is a modified olefin resin containing an epoxy group in a molecule thereof.  
   
   
       6 . A resin composition for sliding member according to  claim 5 , wherein the modified olefin resin is an ethylene-glycidyl methacrylate copolymer.  
   
   
       7 . A resin composition for sliding member according to  claim 2 , wherein the aromatic polyamide resin is a poly-m-phenylene isophthalamide resin, a poly-p-phenylene terephtahalamide resin or a copoly-p-phenylene-3,4′-oxiphenylene terephtahalamide resin.  
   
   
       8 . A resin composition for sliding member according to  claim 2 , wherein the aromatic polyester resin is a homopolymer of p-hydroxybenzoic acid.  
   
   
       9 . A sliding member obtained by molding the resin composition for sliding member as defined in  claim 1.