This invention relates to high molecular weight block copolymers of e-caprolactone and ω-lauryl lactam prepared by sequential bulk polymerization using a mixture of at least one anionic polymerization initiator and optionally at least one co-initiator. A preferred continuous sequential bulk reactive extrusion process comprises feeding a mixture of ω-lauryl lactam, at least one anionic polymerization initiator, and at least one co-initiator into the first (i.e., upstream) hopper of an extruder, and thereafter feeding e-caprolactone into a second (i.e., downstream) hopper of the extruder. The preferred continuous sequential bulk reactive extrusion is solvent free, rapid (typical mean and maximum residence times in the extruder being no more than about 20 minutes and 30 minutes respectively), and produces a high conversion of monomers to block copolymer. The poly(e-caprolactone/ω-lauryl lactam) block copolymers compatibilize the blending of otherwise immiscible or poorly miscible polymers to form polymer blends having improved mechanical and thermal properties. Accordingly, the block copolymers can be compounded with chlorine containing polymers and other polymers such as polyamides, anhydride polymers such as maleic anhydride, and the like. To improve the impact resistance of the compatibilized blend, impact modifiers can be utilized such as maleic anhydride modified EPM, EPDM, and the like. To improve thermal and mechanical properties, thermal performance modifiers can be utilized such as maleic anhydride polyolefins or maleic anhydride modified polymers made from vinyl substituted aromatic monomers.

Block copolymers of lactone and lactam, compatabilizing agents, and compatibilized polymer blends

A system and method for locking a door. An assembly has a first engagement surface. A door is coupled to the assembly, the door including a latch member having a second engagement surface for engaging the first engagement surface. A movable member is capable of generating a force against at least one of the assembly and the door to press together and substantially prevent disengagement of the first engagement surface and the second engagement surface.

Door locking mechanism

An auto railway car having a plurality of decks is provided with a pair of folding door structures for closing the loading end of the car. The doors are hinged on spherical bearing structures and include locking mechanisms for locking the doors in open or closed positions.

Railway car end doors

A mounting of a container in a rail pair is provided, which is disposed in a passenger compartment of a motor vehicle, and the rails of the rail pair have substantially horizontally extending guide grooves on the mutually facing sides and a projection is mounted in the container on its side facing the respective rail, and the respective guide groove has a cross section which expands from the groove base and the respective projection has a corresponding cross section which is expanded toward the container.

Mounting of a container in a passenger compartment of a motor vehicle

A door-locking assembly for securing the door of freight transporting compartment includes a bolt which is movable between a first, door-locking position and a second, door-unlocking position, and is additionally movable into a third, door-unlocking position which provides additional restraint against motion of the bolt into the first or second positions. The assembly also includes catch means for selectively and alternatively either blocking or clearing the movement of the bolt between the first and second positions and between the first and third positions.

Door lock assembly for freight vehicles

End gate throw latch mechanisms

Trailer axle spring suspension

Trailer stabilizing and suspension assembly

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End gate throw latch mechanisms

Trailer axle spring suspension

Trailer stabilizing and suspension assembly