초록 ▼

A precompounded formulation that acts as an adhesive layer when subjected to heat and pressure in contact with thermoplastics such as polyethylene or polyvinyl chloride and elastomeric materials such as EPDM or chlorobutyl rubber. The formulation incorporates a formaldehyde donor/acceptor system suc

A precompounded formulation that acts as an adhesive layer when subjected to heat and pressure in contact with thermoplastics such as polyethylene or polyvinyl chloride and elastomeric materials such as EPDM or chlorobutyl rubber. The formulation incorporates a formaldehyde donor/acceptor system such as resorcinol and hexamethoxymethylmelamine. The formulation is further comprised of a blend of thermoplastic materials, the composition of which varies depending upon the type of material that the bonding layer is required to adhere to. The formulation will also adhere to thermoplastic elastomers (TPE) making it feasible to manufacture a hose article with elastomeric and thermoplastic layers bonded together by the formulation without the need to vulcanize the article. Heretofore, thermoplastic elastomers were thought to be incapable of adhering to dissimilar materials without the application of a tackifier or an adhesive or glue-like material. The formulation eliminates the need to apply sticky resins and the like in order to bond a thermoplastic and an elastomeric layer together for the manufacture of a composite hose article.

대표청구항 ▼

A unitary, polymeric hose article for conveying fluids comprising: a first annular layer; a second annular layer; the first and second annular layers being composed of dissimilar polymers not readily bondable to one another; one of said annular layers being comprised of a thermoplastic material and

A unitary, polymeric hose article for conveying fluids comprising: a first annular layer; a second annular layer; the first and second annular layers being composed of dissimilar polymers not readily bondable to one another; one of said annular layers being comprised of a thermoplastic material and the other of said annular layers being comprised of an elastomeric material; a reinforcement; and an interlayer of heat setting, compounded adhesive polymeric formulation interposed between and bonded to the first and second annular layers; and compounded formulation comprised of a formaldehyde donor and formaldehyde acceptor system, the formulation having become bonded to the first and second annular layers after application of heat and pressure.