Abstract:
Adhesion between a coating and an EPDM rubber membrane may be improved by pre-treating the surface of the EPDM rubber membrane with an aqueous detergent composition having a pH above 8 and comprising from 1 to 10% by weight phosphate and from 1 to 10% by weight silicate, before application of the mastic.
Abstract:
A laminate useful for seals particularly for vehicle window seals that are flexible, wear resistant and have a low coefficient of friction, is provided. The laminate has a rubber substrate and a polyolefin coating disposed on and adherent to the rubber substrate. The invention also provides methods of making laminates, particularly seals. Such method includes the steps of providing a rubber substrate; then applying a powdered crystalline polyolefin to the rubber substrate, in an amount sufficient to form a continuous layer when melted; and then melting the powdered crystalline polyolefin to form a continuous polyolefin coating disposed on, and adherent to, the rubber substrate. The invention also relates to seals comprising: an polyolefin rubber body; and a continuous coating of fused polyolefin disposed on and adherent to the rubber seal. Preferably the continuous coating of fused polyolefin is disposed in the glass run channel in the rubber body.
Abstract:
A method of forming a two-layer coat, which comprises the steps of: applying (1) a coating composition onto a thermoplastic resin base and drying the coating to form a colored layer, the coating composition (1) comprising: (A) an acrylic resin obtained by copolymerization of a monomer mixture comprising n-butyl (meth)acrylate and methyl (meth)acrylate, each in an amount of at least 30 wt. %; (B) a colorant; and (C) an organic solvent; applying (2) an energy beam curable overcoat composition onto the colored layer, the overcoat composition (2) comprising: (D) a compound having at least three (meth)acryloyl groups and having a molecular weight of 250 to 1,800; and (E) an acrylic resin obtained by copolymerization of a monomer mixture comprising at least 20 wt. % of methyl (meth)acrylate, the compound (D) amounting to at least 50 wt. % of overcoat film-forming components; and curing the applied overcoat composition by energy beam irradiation.
Abstract:
The present invention relates to composite materials made of at least one composite layer of a polyurethane and of a second composite layer which is directly bonded to the first layer and which consists of a thermoplastic material that is different from the polyurethane of layer A). The polyurethane material of layer A) is characterized by a residual content of free reaction components containing ether groups of no more than 400 ppm, and preferably of no more than 100 ppm. The invention also relates to a process for the production of these composite materials and to a method of their use as materials in motor vehicles.