摘要:
Epoxy composites are prepared by separately preheating an epoxy resin and a hardener; mixing the preheated epoxy resin and preheated hardener to form a hot reaction mixture and curing the hot reaction mixture in the presence of a reinforcement until the mixture cures to form a composite having a polymer phase with a glass transition temperature of at least 150°C.
摘要:
A floor module (10) and method of inserting a floor module are provided. The floor module comprises a floor section (18) and a pair of side walls (20) at the peripheral edges of the floor section. The side walls (14) are adhesively secured to the side rails of the vehicle load bearing structure (12). A damper (30) is applied to the bottom of the floor section. The floor module (10) is inserted into the vehicle during the assembly process. Heat activated adhesives (24, 28)secure the floor module to the loading bearing structure (12) of the vehicle during an e-coating process.
摘要:
A polyurea-polymer formulation suitable for preparing a molded polyurea polymer includes a polyisocyanate, an isocyanate-reactive material, and a fatty-acid ester. The fatty-acid ester is present in an amount effective for providing a molded polyurea polymer prepared from the formulation with blister resistance such that when the molded polyurea polymer is exposed to moisture and a temperature of at least 350 °F (177 °C), the molded polyurea polymer is substantially free of blisters. A fatty-acid ester suitable for use with these formulations can be natural or synthetic, and one example includes jojoba oil. A polyurea-polymer formulation can also include other components known to be useful with polyurea polymers such as fillers, catalysts, surfactants, and polyepoxides. A molded polyurea polymer can be prepared from a polyurea-polymer formulation. One method suitable for preparing a molded polyurea polymer includes reaction injection molding.
摘要:
A fully contented floor module (10) is provided. The floor module includes a lower floor section (18) and a plurality of side walls (20) that define a cavity (28). An upper floor segment (24)' is connected to the side walls. A mounting flange (26) extends from the upper floor segment (24) and is adhesively secured to the vehicle load bearing structure (12). The lower floor section (18), side walls (20), upper floor segment (24) and mounting flange (26) are integrally formed. A pivotal floor section (32) is pivotally secured to the upper floor segment (24). A seat (30) may be stowed in the cavity (28). Dampers, heat shields and underbody shields may also be secured to the floor module. The floor module may also include ductwork (44) and wiring raceways (46).
摘要:
Polyurethane and/or polyurea polymers are produced in a reaction injection molding process. The high equivalent weight isocyanate-reactive materials include a high proportion of a hydroxymethylated polyester which can be prepared using annually renewable starting materials.
摘要:
A closure panel (10), which finds particular utility as a liftgate or endgate for an automotive vehicles, such as a truck (14). Typically, the assembly includes a first panel portion (20) opposite a second panel portion (22) and an intermediate material therebetween. Preferably, one or more of the panel portions is formed of a polymeric material and the intermediate material is preferably a structural foam that can bond to both the first and the second panel portions.