Method of joining surfaces using segmented copolyester adhesive

In the method of adhering two surfaces together by heat sealing in which an adhesive coating is applied to one surface, the coating is activated by heat and a second surface is applied to the coating, the improvement which comprises using as the adhesive coating a hot melt adhesive composition which comprises based on the total thermoplastic components,

• A. 1 to 99 percent by weight of thermoplastic segmented copolyester elastomer consisting essentially of a multiplicity of recurring short chain ester units and long chain ester units joined through ester linkages, said short chain ester units amounting to 15 to 75 percent by weight of said copolyester and being of the formula ##EQU7## and said long chain ester units amounting to 25 to 85 percent by weight of said copolyester and being of the formula ##EQU8## wherein R is the divalent aromatic radical remaining after removal of the carboxyl group from aromatic dicarboxylic acid having a molecular weight of less than 350, D is the divalent radical remaining after removal of the hydroxyl groups from organic diol having a molecular weight of less than 250, and G is the divalent radical remaining after removal of the terminal hydroxyl groups from long chain glycol having an average molecular weight of 350 to 6000, said copolyester having a melt index of less than 150 and a melting point of at least 125.degree.C., and
• B. 1 to 99 percent by weight of low molecular weight thermoplastic resin which forms compatible mixtures with the segmented copolyester, is thermally stable at 150.degree.C., and has a melt viscosity of less than 10,000 centipoises at 200.degree.C.

In the method of adhering two surfaces together by heat sealing in which an adhesive coating is applied to one surface, a second surface is applied to the coating thereby forming a composite and the composite is heated to provide heat sealing, the improvement which comprises using as the adhesive a hot melt adhesive composition which comprises, based on the total thermoplastic components,

• A. 1 to 99 percent by weight of thermoplastic segmented copolyester elastomer consisting essentially of a multiplicity of recurring short chain ester units and long chain ester units joined through ester linkages, said short chain ester units amounting to 15 to 75 percent by weight of said copolyester and being of the formula ##EQU9## and said long chain ester units amounting to 25 to 85 percent by weight of said copolyester and being of the formula ##EQU10## wherein R is the divalent aromatic radical remaining after removal of the carboxyl group from aromatic dicarboxylic acid having a molecular weight of less than 350, D is the divalent radical remaining after removal of the hydroxyl groups from organic diol having a molecular weight of less than 250, and G is the divalent radical remaining after removal of the terminal hydroxyl groups from long chain glycol having an average molecular weight of 350 to 6000, said copolyester having a melt index of less than 150 and a melting point of at least 125.degree.C., and
• (B) 1 to 99 percent by weight of low molecular weight thermoplastic resin which forms compatible mixtures with the segmented copolyester, is thermally stable at 150.degree.C., and has a melt viscosity of less than 10,000 centipoises at 200.degree.C.

In the method of preparing reinforced flexible hose containing an inner tube layer, an overlaying reinforcement layer impregnated with binder, and an outer cover layer, the improvement which comprises applying as the binder a thermoplastic hot melt adhesive composition by hot melt application which comprises, based on the total thermoplastic components,

• A. 1 to 99 percent by weight of thermoplastic segmented copolyester elastomer consisting essentially of a multiplicity of recurring short chain ester units and long chain ester units joined through ester linkages, said short chain ester units amounting to 15 to 75 percent by weight of said copolyester and being of the formula ##EQU11## and said long chain ester units amounting to 25 to 85 percent by weight of said copolyester and being of the formula ##EQU12## wherein R is the divalent aromatic radical remaining after removal of the carboxyl group from aromatic dicarboxylic acid having a molecular weight of less than 350, D is the divalent radical remaining after removal of the hydroxyl groups from organic diol having a molecular weight of less than 250, and G is the divalent radical remaining after removal of the terminal hydroxyl groups from long chain glycol having an average molecular weight of 350 to 6000, said copolyester having a melt index of less than 150 and a melting point of at least 125.degree.C., and
• (B) 1 to 99 percent by weight of low molecular weight thermoplastic resin which forms compatible mixtures with the segmented copolyester, is thermally stable at 150.degree.C., and has a melt viscosity of less than 10,000 centipoises at 200.degree.C.

In the method of preparing reinforced flexible hose containing an inner tube layer, an overlaying reinforcement layer impregnated with binder, and an outer cover layer, the improvement which comprises applying as the binder a thermoplastic hot melt adhesive composition by hot melt application which comprises, based on the total thermoplastic components,

• A. 5 to 50 percent by weight of thermoplastic segmented copolyester elastomer consisting essentially of a multiplicity of recurring short chain ester units and long chain ester units joined through ester linkages, said short chain ester units amounting to 15 to 65 percent by weight of said copolyester and being of the formula ##EQU13## and said long chain ester units amounting to 35 to 85 percent by weight of said copolyester and being of the formula ##EQU14## wherein R is the divalent aromatic radical remaining after removal of the carboxyl groups from aromatic dicarboxylic acid having a molecular weight of less than 350, D is the divalent radical remaining after removal of the hydroxyl groups from organic diol having a molecular weight of less than 250, and G is the divalent radical remaining after removal of the terminal hydroxyl groups from long chain glycol having an average molecular weight of 350 to 6000, a melting point of less than 55.degree.C., and a carbon to oxygen ratio of greater than 2.5, said copolyester having a melt index of less than 150 and a melting point of at least 125.degree.C., and
• B. 50 to 95 percent of weight of low molecular weight thermoplastic resin which forms compatible mixtures with the segmented copolyester, is thermally stable at 150.degree.C., and has a melt viscosity of less than 10,000 centipoises at 200.degree.C. and is selected from the group consisting of hydrocarbon resins, bituminous asphalts, cool tar pitches, rosins, phenolic resins, chlorinated aliphatic hydrocarbon waxes, and chlorinated polynuclear aromatic hydrocarbons.

In the method of preparing reinforced flexible hose containing an inner tube layer, an overlaying reinforcement layer impregnated with binder, and an outer cover layer, the improvement which comprises applying as the cover layer a thermoplastic hot melt adhesive composition by hot melt application which comprises, based on the total thermoplastic components,

• A. 1 to 99 percent by weight of thermoplastic segmented copolyester elastomer consisting essentially of a multiplicity of recurring short chain ester units and long chain ester units joined through ester linkages, said short chain ester units amounting to 15 to 75 percent by weight of said copolyester and being of the formula ##EQU15## and said long chain ester units amounting to 25 to 85 percent by weight of said copolyester and being of the formula ##EQU16## wherein R is the divalent aromatic radical remaining after removal of the carboxyl group from aromatic dicarboxylic acid having a molecular weight of less than 350, D is the divalent radical remaining after removal of the hydroxyl groups from organic diol having a molecular weight of less than 250, and G is the divalent radical remaining after removal of the terminal hydroxyl groups from long chain glycol having an average molecular weight of 350 to 6000, said copolyester having a melt index of less than 150 and a melting point of at least 125.degree.C., and
• B. 1 to 99 percent by weight of low molecular weight thermoplastic resin which forms compatible mixtures with the segmented copoplyester, is thermally stable at 150.degree.C., and has a melt viscosity of less than 10,000 centipoises at 200.degree.C.

In the method of preparing reinforced flexible hose containing an inner tube layer, an overlaying reinforcement layer impregnated with binder, and an outer cover layer, the improvement which comprises applying as the cover layer a thermoplastic hot melt adhesive composition by hot melt application which comprises, based on the total thermoplastic components,

• A. 50 to 95 percent by weight of thermoplastic segmented copolyester elastomer consisting essentially of a multiplicity of recurring short chain ester units and long chain ester units joined through ester linkages, said short chain ester units amounting to 15 to 65 percent by weight of said copolyester and being of the formula ##EQU17## and said long chain ester units amounting to 35 to 85 percent by weight of said copolyester and being of the formula ##EQU18## wherein R is the divalent aromatic radical remaining after removal of the carboxyl groups from aromatic dicarboxylic acid having a molecular weight of less than 350, D is the divalent radical remaining after removal of the hydroxyl groups from organic diol having a molecular weight of less than 250, and G is the divalent radical remaining after removal of the terminal hydroxyl groups from long chain glycol having an average molecular weight of 350 to 6000, a melting point of less than 55.degree.C., and a carbon to oxygen ratio of greater than 2.5, said copolyester having a melt index of less than 150 and a melting point of at least 125.degree.C., and
• B. 5 to 50 percent by weight of low molecular weight thermoplastic resin which forms compatible mixtures with the segmented copolyester, is thermally stable at 150.degree.C., and has a melt viscosity of less than 10,000 centipoises at 200.degree.C. and is selected from the group consisting of hydrocarbon resins, bituminous asphalts, coal tar pitches, resins, phenolic resins, chlorinated aliphatic hydrocarbon waxes, and chlorinated polynuclear aromatic hydrocarbons.

In the method of preparing reinforced flexible hose containing an inner tube layer, an overlaying reinforcement layer impregnated with binder, and an outer cover layer, the improvement which comprises applying as the binder and the cover layer a thermoplastic hot melt adhesive composition by hot melt application which comprises, based on the total thermoplastic components,

• A. 1 to 99 percent by weight of thermoplastic segmented copolyester elastomer consisting essentially of a multiplicity of recurring short chain ester units and long chain ester units joined through ester linkages, said short chain ester units amounting to 15 to 75 percent by weight of said copolyester and being of the formula ##EQU19## and said long chain ester units amounting to 25 to 85 percent by weight of said copolyester and being of the formula ##EQU20## wherein R is the divalent aromatic radical remaining after removal of the carboxyl group from aromatic dicarboxylic acid having a molecular weight of less than 350, D is the divalent radical remaining after removal of the hydroxyl groups from organic diol having a molecular weight of less than 250, and G is the divalent radical remaining after removal of the terminal hydroxyl groups from long chain glycol having an average molecular weight of 350 to 6000, said copolyester having a melt index of less than 150 and a melting point of at least 125.degree.C., and
• B. 1 to 99 percent by weight of low molecular weight thermoplastic resin which forms compatible mixtures with the segmented copolyester, is thermally stable at 150.degree.C., and has a melt viscosity of less than 10,000 centipoises at 200.degree.C.

In the method of preparing reinforced flexible hose containing an inner tube layer, an overlaying reinforcement layer impregnated with binder, and an outer cover layer, the improvement which comprises applying as the binder and the cover layer a thermoplastic hot melt adhesive composition by hot melt application which comprises, based on the total thermoplastic components,

• A. 50 to 95 percent by weight of thermoplastic segmented copolyester elastomer consisting essentially of a multiplicity of recurring short chain ester units and long chain ester units joined through ester linkages, said short chain ester units amounting to 15 to 65 percent by weight of said copolyester and being of the formula ##EQU21## and said long chain ester units amounting to 35 to 85 percent by weight of said copolyester and being of the formula ##EQU22## wherein R is the divalent aromatic radical remaining after removal of the carboxyl groups from aromatic dicarboxylic acid having a molecular weight of less than 350, D is the divalent radical remaining after removal of the hydroxyl groups from organic diol having a molecular weight of less than 250, and G is the divalent radical remaining after removal of the terminal hydroxyl groups from long chain glycol having an average molecular weight of 350 to 6000, a melting point of less than 55.degree.C., and a carbon to oxygen ratio of greater than 2.5, said copolyester having a melt index of less than 150 and a melting point of at least 125.degree.C., and
• (B) 5 to 50 percent by weight of low molecular weight thermoplastic resin which forms compatible mixtures with the segmented copolyester, is thermally stable at 150.degree.C., and has a melt viscosity of less than 10,000 centipoises at 200.degree.C. and is selected from the group consisting of hydrocarbon resins, bituminous asphalts, coal tar pitches, rosins, phenolic resins, chlorinated aliphatic hydrocarbon waxes, and chlorinated polynuclear aromatic hydrocarbons.