RHEOVIS PU 1250

RHEOVIS PU 1250

Rheovis PU 1250 is non-ionic medium pseudoplastic rheology modifier for water-based coatings. 
The recommended dosage rate is 0.2-2.0 % of Rheovis PU 1250 as supplied on total formulation, depending on the pigmentation, kind of binder, emulsifier used and co-solvent. 
Undiluted Rheovis PU 1250 can be incorporated into the system while stirring. 

Cuts in butyl glycol or 1,2-propylene glycol are possible as well. 
Rheovis PU 1250 is a non-ionic rheology modifier for waterborne coatings that provides structural viscosity. 
Rheovis PU 1250 is a polyurethane polymer in water/butoxydiglycol. 
This yellowish, white hazy Rheovis PU 1250 is suitable for thickening and modification of flow properties of waterborne polymers and other aqueous systems as well as for finished products like coatings and putties. 

These properties can be achieved in all kind of emulsions based on e.g. acrylic copolymer, vinyl acetate homopolymer, acrylic polymers, PVAc-VC copolymers, polyurethanes, amine neutralized and emulsified systems. 
Rheovis PU 1250 is a mid-shear thickener with medium pseudoplasticity.
Rheovis PU 1250 should be stored in tightly closed containers. 

The packed product is not damaged by low temperatures or by frost. 
If stored at low temperatures precipitation or gelatinization of Rheovis PU 1250 is possible. 
This process is reversible. 
Please heat product to room temperature and stir well before use.

Rheovis additives encompass a broad portfolio of synthetic rheology modifiers designed for aqueous systems, including non-ionic associative (HEUR / HMPE), anionic associative (HASE) and non-associative anionic (ASE) technologies. 
Each product class has its own properties and applications to enable formulators to achieve their desired rheology profile with all types of resins. 
Rheovis PU and PE series of associative thickeners stand out as a class of groundbreaking additives based primarily on hydrophobically modified polyether and polyurethane derivatives. 

USES and APPLICATIONS of RHEOVIS PU 1250:
-Rheovis PU 1250 is used Architectural Coatings, Baking Coating/Enamel, Exterior Paint, Exterior Primer, Exterior Wood Stains, General Industrial Coating, Interior Paint, Interior Primer.
-Rheovis PU 1250 is suitable for the thickening and modification of the flow properties of water-based polymers and other aqueous systems as well as for finished products such as coatings and putties. 

-Rheovis PU 1250 is filmbuilding and shows good affinity to pigments. 
Thickening is independent of the pH. 
-Rheovis PU 1250 is suitable for the thickening and modification of the flow properties of water-based polymers (e.g., acrylic copolymers, vinyl acetate homopolymers, acrylic polmyers, PVAc-VC copolymers, polyurethanes, amine-neutralized and emulsified systems). 

-Rheovis PU 1250rheology modifiers:
• reduce dripping and spattering of paint during roller or brush application, 
• improve sag resistance of a paint by a rapid, but controlled viscosity increase after application, 
• prevent sedimentation of the pigments within a formulation during transport and storage of the paint.

-Mid-shear thickener, medium pseudo-plastic behavior; promotes excellent orientation of effect pigments
• polyurethane-based associative thickener
• non-ionic, medium pseudoplastic rheology modifier for water-based coatings
• thickening is pHindependent
• improved flow and gloss
• increased hiding power
• wash and scrub resistances
• outstanding spatter resistance during roller application

-Rheovis PU 1250 is suitable for thickening and modification of the flow properties of water-based polymers (e.g. acrylic polymers, vinyl
acetate homopolymers, PVAc-VC copolymers, polyurethanes, amineneutralized and emulsified systems).
-Because of Rheovis PU 1250's low viscosity, Rheovis PU 1250 can be used as supplied. 
However, Rheovis PU 1250 can be diluted with water-soluble co-solvents (e.g. butyl glycol or 1,2-propylene glycol).

-Rheovis PU 1250 is suitable for the thickening and modification of the flow properties of water-based polymers and other aqueous systems as well as for finished products such as coatings and putties. 
-Rheovis PU 1250 is filmbuilding and shows good affinity to pigments. 
-Thickening is independent of the pH.

-Rheovis PU 1250 is suitable for the thickening and modification of the flow properties of water-based polymers (e.g., acrylic copolymers, vinyl acetate homopolymers, acrylic polmyers, PVAc-VC copolymers, polyurethanes, amine-neutralized and emulsified systems).
-Rheovis PU 1250 rheology modifiers enable paint producers to adjust the flow behavior of paints. 
That way, painters benefit from improved viscosity and application characteristics. 

-Rheovis PU 1250 is Nonionic associative thickener: 
Hydrophobically Modified Polyurethane (HEUR), Medium shear thickener; medium pseudoplastic; provides optimum orientation of effect pigments.
-A dosage of 0.2 – 2.0% calculated on total formulation is recommended.

-As well as the inorganic thickeners, however, Rheovis PU 1250 is also possible to use one or more organic thickeners. 
These are preferably selected from the group consisting of (meth)acrylic acid-(meth)acrylate copolymer thickeners, and of polyurethane thickeners. 
(Meth)acrylic acid-(meth)acrylate copolymer thickeners are those which as well as acrylic acid and/or methacrylic acid also contain in copolymerized form one or more acrylic esters (i.e., acrylates) and/or one or more methacrylic esters (i.e., methacrylates). 
A feature common to the (meth)acrylic acid-(meth)acrylate copolymer thickeners is that in an alkaline medium, in other words at pH levels >7, more particularly >7.5, by formation of a salt of the acrylic acid and/or methacrylic acid, in other words by the formation of carboxylate groups, they exhibit a strong increase in viscosity. 

-Thickening agents based on polyurethanes (e.g. polyurethane associative thickeners) are optionally crosslinked and/or neutralized with a suitable base.
Corresponding products such as Rheovis PU 1250 are available commercially. 
Examples of suitable polymeric waxes include modified or unmodified polymeric waxes based on ethylene-vinyl acetate copolymers.
-Rheovis PU 1250, 1550 40 ~ 3,500 20 mid-shear thickener; medium pseudoplastic; provides excellent orientation of effect pigments

-There is preferably also a thickener present. 
Suitable thickeners are inorganic thickeners from the group of the sheet silicates. 
As well as the inorganic thickeners, however, it is also possible to use one or more organic thickeners. 
These are preferably selected from the group consisting of (meth)acrylic acid-(meth)acrylate copolymer thickeners Rheovis AS S130, and of polyurethane thickeners, for example Rheovis PU 1250. 
The thickeners used are different from the binders used.

ADVANTAGES of RHEOVIS PU 1250:
*improved flow and gloss
*increase in hiding power
*wash and scrub resistances
*outstanding spatter resistance during roller application chemical nature polyurethane emulsion in water/butyl diglycol 

PHYSICAL and CHEMICAL PROPERTIES of RHEOVIS PU 1250:
physical form: yellowish white hazy liquid
shelf life: When stored under the usual appropriate storage conditions, the product can be stored for 1 year.
Typical properties (no supply specification):
solids content ~ 40 %
density: at 20 °C (68 °F) ~ 1.06 g/cm3
Brookfield viscosity: at 25 ºC (77 °F) ~ 3,500 mPa. s 
solvent: water / butyl diglycol
density: (25°C) ~ 1.065 g/cm3
solid content: ∼ 40%
viscosity (25°C): ∼ 3,500 mPa⋅s
pH value (2% in water): ∼ 7

FIRST AID MEASURES of RHEOVIS PU 1250:
-Description of first aid measures:
*General advice:
Remove contaminated clothing.

*If inhaled:
Remove the affected individual into fresh air and keep the person calm. 
Seek medical attention.

*If on skin:
Wash thoroughly with soap and water. 

*If in eyes:
Wash affected eyes for at least 15 minutes under running water with eyelids held open. 
Seek  medical attention.

*If swallowed:
Rinse mouth and then drink 200-300 ml of water. 
Seek medical attention if necessary.

ACCIDENTAL RELEASE MEASURES of RHEOVIS PU 1250:
-Personal precautions, protective equipment and emergency procedures:
Use personal protective clothing. 

-Environmental precautions:
Do not discharge into drains/surface waters/groundwater.

-Methods and material for containment and cleaning up:
*For small amounts: 
Pick up with absorbent material (e.g. sand, sawdust, general-purpose binder).
Dispose of absorbed material in accordance with regulations.

*For large amounts: 
Pump off product.
Place absorbed material in the same container as the spilled substance/product for disposal.

FIRE FIGHTING MEASURES of RHEOVIS PU 1250:
-Extinguishing media:
*Suitable extinguishing media:
water spray, dry powder, foam

-Further information:
The degree of risk is governed by the burning substance and the fire conditions. 
Contaminated extinguishing water must be disposed of in accordance with official regulations.

EXPOSURE CONTROLS/PERSONAL PROTECTION of RHEOVIS PU 1250:
-Personal protective equipment:
*Hand protection:
Chemical resistant protective gloves

*Eye protection:
Tightly fitting safety goggles (chemical goggles).

-General safety and hygiene measures:
Handle in accordance with good industrial hygiene and safety practice.

HANDLING and STORAGE of RHEOVIS PU 1250:
-Precautions for safe handling:
No special measures necessary provided product is used correctly.

-Further information on storage conditions: 
No special precautions necessary. 
Keep in a cool place.
Store protected against freezing.

STABILITY and REACTIVITY of RHEOVIS PU 1250:
-Reactivity:
No hazardous reactions if stored and handled as prescribed/indicated.
-Chemical stability:
The product is stable if stored and handled as prescribed/indicated.

-Possibility of hazardous reactions:
None if used for intended purpose.
-Incompatible materials:
None known during use and storage if used according to instructions.

-Hazardous decomposition products: 
No hazardous decomposition products known.
*Thermal decomposition:
No decomposition if stored and handled as prescribed/indicated.