EXPANDABLE RUBBER COMPOSITION FOR PACKING STRUCTURE AND FOAM FOR PACKING STRUCTURE

摘要

PROBLEM TO BE SOLVED: To obtain an inexpensive and expandable rubber composition for packing a structure, excellent in storage stability and foam for packing a structure, having excellent compressive rigidity and large energy absorbing amount. ;SOLUTION: This expandable rubber composition is arranged in a prescribed space in a structure and expanded by being heated to pack the space in the structure with the composition. The rubber composition is obtained by blending 100 pts.wt. diene-based rubber with 10-50 pts.wt. sulfur or 1-30 pts.wt. sulfur, 5-100 pts.wt. rigidity imparting agent and 5-40 pts.wt. foaming agent. This foam for packing a structure is obtained by heating and expanding the expandable rubber composition and has ≥0.5kN/mm/25cm² area compressive rigidity and ≥100kN.mm/25m² energy absorption amount.;COPYRIGHT: (C)1997,JPO