| 摘要 |
Hot melt adhesive compositions comprising a block copolymer, a particulate mineral reinforcing agent and glass fiber. The block copolymer is selected from the group consisting of copolyesters, copolyamides, copoly(esteramides) and copoly(ether-esters) melting at a temperature above about 150 DEG C. and having from about 30 to about 70 weight percent of hard segments and from about 70 to about 30 weight percent of soft segments. The weight ratio of block copolymer to particulate mineral reinforcing agent and glass fiber is in the range of about 3:7 to about 3:2, the weight ratio of block copolymer to glass fiber is at least about 3:4, and the weight ratio of particulate mineral reinforcing agent to glass fiber is in the range of about 1:3 to about 9:1. The compositions are particularly useful for filling voids and cavities in substrates, which comprise applying excess adhesive composition as a hot melt into the cavity, spreading the adhesive composition to fill the cavity, cooling said adhesive composition and thereafter sanding said composition to provide a surface even with the surrounding substrate. |
