FIELD: petrochemical processes.
SUBSTANCE: invention relates to a method for production of bitumen-polyurethane compositions designed mainly for manufacturing road, protective, insulation, and anticorrosive coatings. Modification of bitumen comprises interaction of bitumen bulk with prepolymer preliminarily prepared from components containing polyol and isocyanate groups, interaction being carried out at 60-140°C for 0.25-1 h, said components with polyol groups being polyethers and groups of polyuoxypropylene glycols and polyethylene(butylene) glycol adipates with functionality at least 2, whereas components with isocyanate groups are 2,4-tolylene diisocyanate, provided that molar ratio OH/NCO is 1:2 and amount of prepolymer corresponds to 1-10 wt % of the weight of bitumen.
EFFECT: achieved production of material with lowered brittleness temperature and water absorption, raised softening temperature, increased adhesion and elongation strength, and enhanced corrosion resistance.
2 tbl, 28 ex
| Title | Year | Author | Number |
|---|---|---|---|
| BITUMEN MODIFICATION PROCESS | 2005 |
|
RU2296142C2 |
| METHOD OF GETTING A POLYMER-BITUMEN BENDING BASED ON FOAMED POLYURETHANE | 2017 |
|
RU2648097C1 |
| POLYURETHANE-BITUMEN COMPOSITION | 2001 |
|
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| MODIFIER OF ORGANIC BINDER | 2014 |
|
RU2583016C2 |
| METHOD OF MANUFACTURING ELASTIC COLD-MOLDING POLYURETHANE FOAM, AND ACTIVATING MIXTURE FOR CARRYING SAID METHOD INTO EFFECT | 1995 |
|
RU2103279C1 |
| PROCESS FOR PREPARING ELASTIC FOAM POLYURETHANE ARTICLES | 1992 |
|
RU2024555C1 |
| POLYURETHANE-BITUMEN COMPOSITION | 2004 |
|
RU2258074C1 |
| HIGHLY CONCENTRATED WATER NANO-SIZE PU-DISPERSION, WHICH DOES NOT CONTAIN SOLVENT, METHOD OF ITS OBTAINING AND APPLICATION | 2014 |
|
RU2554882C1 |
| METHOD OF PRODUCING POLYMER-POLYOL, DISPERSED POLYOL COMPOSITION, ELASTIC POLYURETHANE, AND MOLDED PRODUCT | 2004 |
|
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| POLYURETHANE COMPOSITION FOR ARTICLES WITH INCREASED FROST RESISTANCE AND METHOD FOR PRODUCTION THEREOF | 2020 |
|
RU2761276C1 |
