Self-adhesive bituminous sheath for building and bitumen modifier for self-adhesive bituminous sheath

Abstract

An adhesive bituminous sheath for building includes bitumen and an adhesivizing additive mixed with the bitumen, wherein the adhesivizing additive is an aliphatic and cycloaliphatic resin.

Claims

1. A permanent adhesive bituminous sheath for use in construction, the permanent adhesive bituminous sheath comprising: a bitumen; a bituminous modifier comprising vulcanized rubber powder with a granularity of less than 0.4 millimeters, styrene-butadiene-styrene polymer and a lubricant and an adhesivizing additive mixed with said bitumen, said adhesivizing additive being a mixture of only aliphatic and cycloaliphatic resin in an amount of between 1 and 4 weight percent of a total weight of the adhesive bituminous sheath.

2. The permanent adhesive bituminous sheath of claim 1, wherein said aliphatic and cycloaliphatic resin comprises oligomers derived from C5 unsaturated hydrocarbons and fractions of C4 and C6 hydrocarbons, wherein the oligomers derived from C5 unsaturated hydrocarbons are selected from the group consisting of pentenes, pentadienes, cyclopentenes, cyclopentadienes and mixtures thereof.

3. The permanent adhesive bituminous sheath of claim 1, wherein said bitumen modifier is between 10 and 30 weight percent of the total weight of the adhesive bituminous sheath.

4. A method of manufacturing a permanent adhesive bituminous sheath, the method comprising: forming a bituminous modifier by extruding a mixture of vulcanized rubber powder with a granularity less than 0.4 millimeters, styrene-butadiene-styrene polymer, a lubricant and an adhesivizing additive being only an aliphatic and cycloaliphatic resin, the aliphatic and cycloaliphatic resin being between 10% and 40% of a total weight of the bituminous modifier; and mixing bitumen with the bituminous modifier.

5. The method of claim 4, wherein: the bitumen is mixed with the aliphatic and cycloaliphatic resin at a temperature of between 170? C. and 190? C.

Description

EXAMPLE 1 (INVENTIONALIPHATIC RESIN)

(1) TABLE-US-00001 BITUMEN grade 160/220.sup.(1) 87.5 parts Modifier type CPR/3T.sup.(2) 12 parts Aliphatic resin type C5.sup.(3) 2.5 parts Analytical results Ring ball ? C. 99 Penetration dmm 46 Peeling Test.sup.(4) g/cm 550 .sup.(1)The BITUMEN grade 160/220 is a standard (non modified) bitumen with penetration grade 160/220 at 25? C. .sup.(2)The Modifier type CPR/3T is made according to the precepts of the patent application WO2013/064408 .sup.(3)The Aliphatic Resin type C5 is a product known on the market with the brand REGALITE R 1100-completely aliphatic and cycloaliphatic resin. .sup.(4)The Peeling Test was tested with Adhesion on Steel.

EXAMPLE 2 (AROMATIC RESIN)

(2) TABLE-US-00002 BITUMEN grade 160/220 87.5 parts Modifier type CPR/3T 12 parts Aromatic Resin.sup.(5) 2.5 parts Analytical results Ring ball ? C. 97 Penetration dmm 50 Peeling Test Kg/cm 260 .sup.(5)The Aromatic Resin is a product known on the market with the brand REGALITE R 9100-aromatic resin.

EXAMPLE 3 (COLOPHONIC RESIN)

(3) TABLE-US-00003 BITUMEN grade 160/220 87.5 parts Modifier type CPR/3T 12 parts Colophonic Resin.sup.(6) 2.5 parts Analytical results Ring ball ? C. 97 Penetration dmm 52 Peeling Test Kg/cm 275 .sup.(6)The product used is modified colophonic resin.

EXAMPLE 4 (WITHOUT ADHESIVIZING AGENT)

(4) TABLE-US-00004 BITUMEN grade 160/220 87.5 parts Modifier type CPR/3T 12 parts Analytical results Ring ball ? C. 97 Penetration dmm 52 Peeling Test Kg/cm 50

(5) The aforementioned examples and the results obtained in the Peeling Test demonstrate that the aliphatic and cycloaliphatic resin gives higher adhesive properties both compared to the aromatic and the colophonic resin.

(6) The high value obtained in the peeling test in example 1, compared to examples 2 and 3 with the same concentration of adhesive resin, is due to the different solubility of the aliphatic resin in the bitumen, which determines a surface accumulation with a consequent increase of its local concentration.

(7) In fact, the other two resins (aromatic resin and colophonic resin) are perfectly soluble in the bitumen, therefore these resins do not originate migration phenomena towards the external surfaces, the adhesive concentration remains practically constant in all parts of the bituminous mixture and the results of the peeling test are consequent to such a characteristic.