DESCRIPTION:
RoadChem™ 305® is a 100% active cationic emulsifier for the manufacture of asphalt emulsions for quick set slurry and microsurfacing applications. RoadChem™ 305® is designed to have a wider range of compatibility with aggregates and is suited especially to highly reactive aggregates that have adhesion problems. The emulsifier provides extended mixing times to ensure coating and the controlled chemical break allows rapid build up of cohesion after mixing. This insures quick traffic times. RoadChem™ 305® is especially suited to cooler climatic conditions and can be combined with tallow diamine emulsifiers or RoadChem™ 205® for high performance microsurfacing emulsion.

BENEFITS:

• Stablility
• Easy to handle and transport
• Quick traffic
• Wide range of compatibility with aggregates
• Extended mixing times to ensure coating

PHYSICAL PROPERTIES:
Pour Point: (C) 25C
Flash Point (Closed Cup): (C) > 200C Appearance: Soft paste
SG: 25C 0.99 kg/lt
Viscosity, cps 38C: 350-450
Actives: 100%
Storage Life: Min 12 months in drums or bulk. (100-50C in covered area in sealed drums).

APPLICATION:
RoadChem™ 305® may be used with a range of different polymer modification including Neoprene, SBP, EVA, EMA and SBS.

Emulsion Manufacture:
RoadChem™ 305® should be kept at 50C or higher prior to use for pumping. It should not be stored at above 60C.

RoadChem™ 305® can be easily neutralized with hydrochloric acid (concentrated). It is good practice to acidify the water before addition of RoadChem™ 305®.

TYPICAL FORMULATION:
All formulations should be tested in the laboratory before use.

Slurry Seal Quick Set:
Asphalt: 62-63%
Soap (based on total emulsion by weight) RoadChem™ 305®: 1.5-2.0% Concentrated HCI (pure): to pH 1.5-2.5 Water to 100%

Slurry Seal Polymer Modified:
Asphalt: 62-63%
Soap (based on total emulsion by weight). RoadChem™ 305®: 1.5-2.0%
Concentrated HCI (pure) to pH 1.5-2.5
Latex (60% solids): 3 -4.0%

Microsurfacing:
Asphalt: 62-63%
Soap( based on total emulsion by weight). RoadChem™ 305®: 0.75-1.0% RoadChem™ 205®: 0.75-1.0% Concentrated HCI (pure) to pH 1.5-2.5
Latex (60% solids): 3 -4.0%

NOTES:
Note that RoadChem™ 305® should be added to warm water that has already had the acid added to it. The emulsifier buffers the solution so mix for at least 20 minutes before testing pH.

Note also that slurry and microsurfacing emulsions must be designed relatively to the mixture. That is a full ISSA mixture design must be done to verify performance.

Notes:
1. RoadChem™ 305® may be blended with RoadChem™ 300® to improve adhesion and extend mixing times of RoadChem™ 300® slurry emulsions.
2. RoadChem™ 305®: may be used with a wide range of retarders including aluminum sulfate, ammonium chloride, JP4, borax, and may be used in the prewet water in a neutralized solution of 5% as a retarder.
3. RoadChem™ 305®: has a high viscosity at low temperatures, store at 60C and heat to up to 90C for short periods to allow pumping.
4. RoadChem™ 305®: neutralizes easily, The ratio of HCI: RoadChem™ 305®: to achieve required pH is about 0.4.
5. Prolonged exposure of RoadChem™ 305® to moisture or carbon dioxide will reduce its activity. As far as possible use only full drums.
6. Latex should be co-milled into the emulsion for the best dispersion, emulsion stability and control of the final properties of the slurry. Latex may be post added or added into the soap if no co milling is not available.

SAFETY:
Contains alkaline corrosive materials. Will cause eye and skin irritation if significant contact is made. Use goggles, gloves and protective clothing when handling. Refer to the MSDS for further information.

Valley Slurry Seal Company, PO Box 981330, West Sacramento, CA 95798, USA.
Phone (916) 373-1500 Fax: (916) 373-1438 Email: vss@slurry.com

Information given herein is given in good faith, without warranty, representation or inducement or license of any kind. VSS does not assume any legal responsibility for reliance upon same. VSS is not responsible for materials not manufactured by VSS that may represent a hazard in handling or use, nor for the safety of any process employing any VSS product. No representation is given as to freedom from patent restriction.

RK/August 5, 1998