Abstract: The present invention relates to a method for reinforcing a vehicle subframe comprising one or more hollow sheet metal parts, comprising: determining at least one area on a hollow sheet metal part of a subframe with respect to specified conditions; preparing a reinforcement part which is insertable into the hollow sheet metal part at the determined area, wherein the reinforcement part comprises: a carrier having at least one hollow chamber; and a pre-foam of a foam material, which is able to expand after being heated, the pre-foam being isolated from the at least one hollow chamber and distributed at least partly on the periphery of the carrier; and installing the reinforcement part within the hollow sheet metal part at the determined area and heating the pre-foam such that it expands. The present invention also relates to a vehicle subframe reinforced by said method.

Abstract: The present invention provides a two-part mechano-responsive composition, comprising: Part I: a tetra-glycidyl amine multifunctional epoxy resin represented by the general formula (I); and Part II: a polythiol and an amine. The cured composition has a mechano-responsive property without adding any dyes or luminescence agents, and by subjected to mechanical stimuli, the cured composition changes its color, and the color is in the visible spectrum range, which can be easily checked with naked eyes; and the color change is reversible.

Abstract: The present invention relates to a method for reinforcing a vehicle subframe comprising one or more hollow sheet metal parts, comprising: determining at least one area on a hollow sheet metal part of a subframe with respect to specified conditions; preparing a reinforcement part which is insertable into the hollow sheet metal part at the determined area, wherein the reinforcement part comprises: a carrier having at least one hollow chamber; and a pre-foam of a foam material, which is able to expand after being heated, the pre-foam being isolated from the at least one hollow chamber and distributed at least partly on the periphery of the carrier; and installing the reinforcement part within the hollow sheet metal part at the determined area and heating the pre-foam such that it expands. The present invention also relates to a vehicle subframe reinforced by said method.

Abstract: The present invention provides a gel time controllable epoxy adhesive, which includes a first part comprising an epoxy resin containing two or more epoxy groups in one molecule, and a second part comprising a thiol curing agent, wherein a peroxide is comprised in part A, part B and/or a third separate part C.

Abstract: The present invention provides a two-part mechano-responsive composition, comprising: Part I: a tetra-glycidyl amine multifunctional epoxy resin represented by the general formula (I); and Part II: a polythiol and an amine. The cured composition has a mechano-responsive property without adding any dyes or luminescence agents, and by subjected to mechanical stimuli, the cured composition changes its colour, and the colour is in the visible spectrum range, which can be easily checked with naked eyes; and the colour change is reversible.

Abstract: The present invention provides a gel time controllable epoxy adhesive, which includes a first part comprising an epoxy resin containing two or more epoxy groups in one molecule, and a second part comprising a thiol curing agent, wherein a peroxide is comprised in part A, part B and/or a third separate part C.

Abstract: A room-temperature curable epoxy structural adhesive composition comprises Component A and Component B, wherein Component A comprises a bisphenol A type epoxy resin, an impact resistance modified bisphenol A type epoxy resin, a silane coupling agent, a thixotropic agent and a coloring agent, wherein Component B comprises a polyamide, a polyether amine, a filler and a curing accelerator, wherein said impact resistance modified bisphenol A type epoxy resin is a liquid NBR modified bisphenol A type epoxy resin and/or a core-shell structural polymer toughened bisphenol A type resin. In addition, a preparation method of the said adhesive composition is provided.