A two-part polyurethane adhesive exhibits excellent adhesion to low surface energy substrates such as polypropylene. The adhesive consists of a polyol component and a polyisocyanate component that are combined and cured to form the adhesive bond. The polyol component is characterized in containing a monoalcohol that has a molecular weight of 100 to 2000. The presence of the monoalcohol promotes strong bonding and a cohesive failure mode that is preferred in vehicular applications.

The invention relates to a method for welding two different polyolefin plastics using a primer, said primer containing at least one maleic anhydride graft polyolefin polymer. The invention also relates to correspondingly welded products.

The invention relates to a method for welding a polyolefin plastic and a plastic consisting of a polymer with at least one aromatic unit in the polymer main chain, using a primer which contains at least one polymer built from at least one monomer with at least one double bond. The invention also relates to correspondingly welded products.

This invention discloses a method to fuse silicone and thermoplastic resin, comprising the following steps: Step A: conducting treatment twice on thermoplastic resin lid upon molding in plasma equipment under normal temperature, and opening the inert molecular chain of thermoplastic resin; wherein the power for treating the thermoplastic resin lid ranges 500 to 800 W, the time of treatment ranges from 5 s to 60 s; Step B: applying glue on the place for laying silicone gasket on thermoplastic resin lid, baking in the oven for 15-20 min; Step C: putting the treated thermoplastic resin lid and silicone gasket in step B into the over mold for encapsulation, the time of which is 2-3 min; conducting post vulcanization for 2 h after completing the encapsulation.

Photocurable adhesive compositions are provided herein, which have a balance of fast curing properties and strength development and retention over time after exposure to accelerated ageing conditions.

This invention discloses a method to fuse silicone and thermoplastic resin, comprising the following steps; Step A: conducting treatment twice on thermoplastic resin lid upon molding in plasma equipment under normal temperature, and opening, the inert molecular chain of thermoplastic resin; wherein the power for treating the thermoplastic resin lid ranges 500 to 800 W, the time of treatment ranges from 5 .sub.s to 60 .sub.s; Step B: applying glue on the place for laying: silicone gasket on thermoplastic resin lid, baking in the oven for 15-20 min; Step C: putting the treated thermoplastic resin lid and silicone gasket in step B into the over mold for encapsulation, the time of which is 2-3 min; conducting post vulcanization for 2 h after completing the encapsulation.

An adhesive set includes a main agent containing a decomplexing agent and an initiator containing an organoborane complex. The decomplexing agent contains maleic anhydride. At least one of the main agent and the initiator further contains a compound having a radically polymerizable group. At least one of the main agent and the initiator further contains at least one selected from the group consisting of a metal halide salt and a compound having a thiocarbonyl thio structure.