摘要:
A polymer modified bitumen composition, comprising 80 to 98.5 parts by weight of a bitumen and 20 to 1.5 parts by weight of a polymer composition, wherein the polymer composition comprises:(i) from 5 to 70% by weight of a linear styrenic block copolymer (SBC1) comprising at least two polymer blocks each substantially made of an aromatic vinyl compound and at least one polymer block substantially made of a conjugated diene compound and having an apparent molecular weight greater than 250,000 and/or a radial styrenic block copolymer (SBC2) having three or more polymer arms attached to the residue of a cross-linking agent or multifunctional compound, comprising at least two polymer blocks each substantially made of an aromatic vinyl compound and at least one polymer block substantially made of a conjugated diene compound and wherein the polymer arms have an average apparent molecular weight greater than 125,000 and (ii) from 95 to 30% by weight of an elastomer (EI) having an apparent molecular weight in the range of 120,000 to 250,000; their use as asphalt binder or as bituminous roofing composition, hot mix asphalt compositions comprising aggregate material and pavements comprising the compacted hot mix asphalt, easy welding roll roofing membranes, comprising said bitumen roofing composition, and specific block copolymers to be used in said bitumen composition.
摘要:
The present invention relates to a bituminous composition, comprising a bituminous component and a block copolymer, wherein the block copolymer comprises at least two terminal poly(vinyl aromatic) blocks and at least one poly(conjugated diene) central block, wherein said poly(conjugated diene) central block(s) is (are) obtained by substantially random copolymerization of butadiene and isoprene a molar ratio between butadiene and isoprene in the range or from 1:2 to 9:1; wherein the poly(vinyl aromatic) content (PSC) is in the range of from 20 to 30 wt %, wherein the content of a possibly accompanying diblock comprising a poly(vinyl aromatic) block and a poly(butadiene/isoprene) block is at most 25 mole %, wherein the 1,2-addition (vinyl content) of the polymerized conjugated dienes is in the range of from 10 to 80%, and wherein the apparent molecular weight of the complete block copolymer is in the range of 310,000 to 380,000.
摘要:
A bituminous composition which comprises a bituminous component and a block copolymer which comprises at least two blocks of a conjugated diene and at least two blocks of a monovinylaromatic hydrocarbon, being of the general formula: S1—B1—S2—B2 wherein B1 is a block of polymerized conjugated diene comprising at least 50 mole % isoprene having an apparent molecular weight of from 180,000 to 400,000, S1 and S2 are blocks of polymerized monovinylaromatic hydrocarbon having a weight average molecular weight of 12,000 to 40,000, and B2 is a block of polymerized conjugated diene comprising at least 50 mole % isoprene having an apparent molecular weight of from 15,000 to 60,000; wherein the weight ratio W of B1 over B2 is in the range of 3.0 to 12.0; and wherein the content of polymerized monovinylaromatic hydrocarbon is in the range from 10 to 35 wt. %.
摘要:
The invention relates to thin block copolymer modified bituminous felts, comprising at least one block copolymer, comprising at least two poly(vinyl aromatic) blocks and at least one poly(conjugated diene) block, in a weight proportion of from more than 20 to 50 wt %, relative to the weight of the block copolymer and bitumen and optionally at least one filler, in a weight proportion in the range of from 0 to 50 wt %, relative to the weight of the complete composition and wherein the respective weight proportions of block copolymer, bitumen and filler add up to 100%. The invention also relates to the block copolymer modified bituminous composition, and the use thereof in bituminous pavements, coatings and sealants.
摘要:
The invention provides a colorable roofing membrane comprising fibrous material and a non-bituminous binder comprising: i. a bitumen-like compound having a penetration value of at least 30 units 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), ii. from 10 to 25 parts by weight on 100 parts of the bitumen-like compound of a hydrogenated styrenic block copolymer (c) of formula A-C-A or (A-C′)n—X, wherein A stands for a polymer block of a vinyl aromatic monomer, X stands for a coupling moiety, n stands for an integer of 2 to 20, and C respectively C′ stand for a polymer block of a conjugated diene monomer, hydrogenated to an extent of at least 50% wherein the total amount of A in block copolymer (c) is in the range of from 22 to 40 weight % and wherein the block copolymer has an apparent molecular weight of from 140,000 to 300,000 (A-C-A), respectively of from n*70,000 to n*150,000 ((A-C′)n—X), wherein component i. and ii. together form 50 to 70% by weight of the total binder, the remainder of the binder being based on iii. from 30 to 50% by weight on the total binder of a pigment and/or filler, and iv. from 0 to 4% by weight on the total binder of a UV stabilizer. The invention also provides the non-bituminous, colorable binder composition for making the roofing membrane.
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)n-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)n-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.