Method for producing a sliding coupling by a monomer casting method

A method for producing a sliding coupling, which comprises injecting a casting material comprising the following components (A) and (B) into a clearance between a bearing and a shaft fitted in and rotatably or reciprocatively supported by the bearing, wherein a primer is preliminarily applied to either the shaft or the bearing and a releasing agent is preliminarily applied to the other;

• followed by polymerization and curing to form a resin lining on the surface of the shaft or the bearing:
• (A) a .OMEGA.-lactam liquid containing a polymerization catalyst of an alkali metal or alkaline earth metal compound;
• and
• (B) a .OMEGA.-lactam liquid containing at least one polymerization initiator selected from the group consisting of a polyoxyalkylene, an oxyalkylene copolymer, a polyalkadiene, an alkadiene copolymer, a polyalkene and an alkene copolymer, each of which has at least two terminal groups selected from the group consisting of lactam terminal groups of the following formulae:
• ##STR25## wherein Q is a lactam residue having a C.sub.3 -C.sub.11 alkylene group, said lactam residue being bonded to C, P or S via its nitrogen atom;
• A is an aliphatic or aromatic hydrocarbon group, or a hydrocarbon group having an ether linkage;
• m is 0 or 1;
• when m is 0, n is 0 or 1, and p is 1;
• when m is 1, n is within a range of from 1 to 3, and p=n;
• R.sub.1 is an alkyl group, an aralkyl group, an alkoxy group, an aryloxy group, a halogen atom or an aralkyloxy group;
• and R.sub.2 is a hydrogen atom or an alkyl group;
• or
• at least one polymerization initiator selected from the group consisting of lactam initiators of the following formulae;
• ##STR26## wherein Z is a polypropylene oxide polyol, t is at least 1, and Q, A, m, n and p are as defined above.