초록 ▼

Disclosed is a method for forming a gasket seal or transition fitting affixed to one of two parts to be joined in a gasketed joint by use of the gasket. The method includes the step of providing a mold having a walled mold cavity of the shape desired for the gasket, at least one wall of the mold cav

Disclosed is a method for forming a gasket seal or transition fitting affixed to one of two parts to be joined in a gasketed joint by use of the gasket. The method includes the step of providing a mold having a walled mold cavity of the shape desired for the gasket, at least one wall of the mold cavity being a junction surface of the one part and the remaining walls of the mold cavity being formed in a mold piece. The mold is closed by placing the mold piece over the junction surface of the one part to establish the mold cavity as a closed generally toroidal volume. Then a molten gasket-forming thermoplastic material is injected into the mold cavity to form the gasket, the thermoplastic material including a bonding agent for establishing an adhesive bond between the junction surface and the gasket. The thermoplastic material is cooled to solidify the gasket and affix it to the junction surface and the mold piece is removed away from the junction surface.

대표청구항 ▼

Disclosed is a method for forming a gasket seal or transition fitting affixed to one of two parts to be joined in a gasketed joint by use of the gasket. The method includes the step of providing a mold having a walled mold cavity of the shape desired for the gasket, at least one wall of the mold cav

Disclosed is a method for forming a gasket seal or transition fitting affixed to one of two parts to be joined in a gasketed joint by use of the gasket. The method includes the step of providing a mold having a walled mold cavity of the shape desired for the gasket, at least one wall of the mold cavity being a junction surface of the one part and the remaining walls of the mold cavity being formed in a mold piece. The mold is closed by placing the mold piece over the junction surface of the one part to establish the mold cavity as a closed generally toroidal volume. Then a molten gasket-forming thermoplastic material is injected into the mold cavity to form the gasket, the thermoplastic material including a bonding agent for establishing an adhesive bond between the junction surface and the gasket. The thermoplastic material is cooled to solidify the gasket and affix it to the junction surface and the mold piece is removed away from the junction surface. atic or non-aromatic cyclic group optionally comprises at least one heteroatom selected from oxygen, sulphur, and nitrogen and which aromatic or non-aromatic cyclic group optionally comprises one or two 5- to 7-membered annelated rings, which is (are) independently aromatic or non-aromatic and which is (are) optionally substituted with at least one substituent selected from those listed above; or an aralkyl or heteroaralkyl group, the alkyl part of which is linear or branched and comprises 1 to 4 carbon atoms and the aryl part or heteroaryl part of which has the same definition as that given above for the aryl and heteroaryl group; or said two substituents R1and R2together form an adamantyl, norbomyl, fluorenylidene, di(C1-C6)alkylantbracenylidene, or spiro(C5-C6)cycloalkylanthracenylidene group; said group being optionally substituted with at least one of the substituents listed above for R1,R2where R1and R2represent an aryl or heteroaryl group; R3,which are identical or different, independently represent: a hydroxy, a halogen, a linear or branched alkyl group comprising 1 to 12 carbon atoms, a cycloalkyl group comprising 3 to 12 carbon atoms, a linear or branched alkoxy group comprising 1 to 12 carbon atoms, a silyloxy group, a haloalkyl, halocycloalkyl, or haloalkoxy group corresponding to the alkyl, cycloalkyl, or alkoxy groups above, respectively, which are substituted with at least one halogen atom, a linear or branched alkenyl or alkynyl group comprising 2 to 12 carbon atoms, an aryl or heteroaryl group having the same definition as that given above for R1,R2, an aralkyl or heteroaralkyl group, the alkyl part of which is linear or branched and comprises 1 to 4 carbon atoms and the aryl part or heteroaryl part of which has the same definition as that given above for R1,R2, a phenoxy or naphthoxy group optionally substituted with at least one linear or branched alkyl or alkoxy group comprising 1 to 12 carbon atoms, an amine or amide group: --NH2,--NHR, --CONH2,--CONHR, wherein R, R', and R" have their respective definitions given above, or an --OCOR6or --COOR6group, wherein R6represents a linear or branched alkyl group comprising 1 to 6 carbon atoms, or a cycloalkyl group comprising 3 to 6 carbon atoms, or a phenyl group, optionally substituted with at least one of the substituents listed above for R1,R2where R1and R2represent an aryl or heteroaryl group; or at least two of the adjacent R3groups together form an aromatic or non-aromatic cyclic group, which aromatic or non-aromatic cyclic group optionally comprises at least one heteroatom selected from oxygen, sulphur, and nitrogen and which aromatic or non-aromatic cyclic group optionally comprises one or two 5- to 7-membered annelated rings, which is (are) independently aromatic or non-aromatic and which is (are) optionally substituted with at least one substituent selected from those listed above for R1,R2where R1and R2represent an aryl or heteroaryl group; m is an integer of 0 to 4; R4,which are identical or different, independently represent a hydroxy, a linear or branched alkyl or alkoxy group comprising 1 to 6 carbon atoms, or two of the R4groups together form a carbonyl (C=O); n is an integer of 0 to 6; R5,which are identical or different, independently represent: a halogen, a hydroxy, a linear or branched alkyl group comprising 1 to 12 carbon atoms, a cycloalkyl group comprising 3 to 12 carbon atoms, a linear or branched alkoxy group comprising 1 to 12 carbon atoms, a haloalkyl, halocycloalkyl, or haloalkoxy group corresponding to the alkyl, cycloalkyl, or alkoxy groups above, respe