Hot melt composition and method of assembling members using the same

A method of assembling members using a hot melt sealing composition, without any tackifier, comprising the steps of:

• melting a hot melt composition consisting essentially of a high-molecular weight styrene bock copolymer having a average molecular weight (Mn) of 100,000 or more, one of a polyphenylene ether resin and a modified polyphenylene ether resin having one of a thermal deformation temperature and a glass transition temperature of 120° C. or above, and a viscosity adjuster, wherein the hot melt composition provides a hot melt sealing composition has a compression set of 50% or less after being compressed for 5 days at a temperature of 80° C. when measured in accordance with JISK6262 and an enhanced disassembly property;
• applying the hot melt sealing composition to a connecting part of one member in advance of a time of assembling work;
• and
• joining the connecting part of the one member to a connecting part of another member at the time of the assembling work, wherein
• the connecting part of the one member and the connecting part of the other member are subsequently readily separable due to the enhanced disassembly property.

A hot melt sealing composition, without any tackifier, consisting essentially of:

• a high-molecular weight styrene block copolymer having an average molecular weight (Mn) of 100,000 or more;
• one of a polyphenylene ether resin and a modified polyphenylene ether resin, having a thermal deformation temperature or glass transition temperature of 120° C. or above;
• and
• a viscosity adjuster;
• wherein the hot melt sealing composition has:
• a compression set of 50% or less after being compressed for 5 days a at a temperature of 80° C. when measured in accordance with JISK6262,
• an adhesive property sufficient for using the hot melt sealing composition as a sealing composition, and,
• an enhanced disassembly property.

A method of assembling members using a hot melt sealing composition, without any tackifier, comprising the steps of:

• melting a hot melt sealing composition consisting essentially of a high molecular weight styrene block copolymer having a average molecular weight (Mn) of 100,000 or more, one of a polyphenylene ether resin and a modified polyphenylene ether resin having one of a thermal deformation temperature and glass transition temperature of 120° C. or above, and a viscosity adjuster, wherein the hot melt composition has a compression set of 50% or less after being compressed for 5 days at a temperature of 80° C. when measured in accordance with JISK6262, an adhesive property sufficient for using the hot melt sealing composition as a sealing composition, and an enhanced disassembly property;
• applying the hot melt sealing composition to a connecting part of one member in advance of a time of assembling work;
• and
• joining the connecting part of the one member to a connecting part of another member at the time of the assembling work;
• wherein the connecting part of the one member and the connecting part of the other member are subsequently readily separable due to the enhanced disassembly property.