| 摘要 |
The present invention concerns a colorable composition comprising a bitumen-like compound having a PEN value of at least 30 dmm at 25° C., and comprising at least a hydrogenated petroleum resin (a) or comprising at least a hydrogenated petroleum resin (a) and an oil (b) and a mixture of thermoplastic elastomers comprising:-one or more engineering thermoplastics (c1) having a melt index of I to 50 at 2.16 kg/12300C (determined in accordance with ASTM D1238), and/or a styrenic block copolymer (c2) of formula A-B-A or (A-B)<SUB>n</SUB>-X, wherein A stands for a polymer block of a vinyl aromatic monomer, B stands for a polymer block of a conjugated diene monomer, X stands for a coupling moiety, and n stands for an integer of 2 to 20, wherein the weight ratio of (c1) to (c2) varies from 100:0 to 0:100; and-a hydrogenated styrenic block copolymer (d) of formula A-C-A or (A-C)<SUB>n</SUB>-X, wherein A, X, and n have the previously given meanings and C stands for a polymer block of a conjugated diene monomer, hydrogenated to an extent of at least 50% wherein the weight ratio of (c), being the total of (c1) and (c2), to (d) varies from 95:5 to 5:95, the total amount of A in block copolymers (c2) and (d) is in the range of from 10 to 45 weight % and wherein the block copolymers have an apparent molecular weight of from 100,000 to 600,000, and the content of said mixture of (c) and (d) being in the range from 5 to 35 wt % based on the composition, and its use as roofing membrane/roofing felt, as well as colored roofing membranes/roofing felts made thereof. |
