News

09.02.2010
Reactive Urethane Acrylate for UV-Applications

Robert Kraemer has supplemented its UV binder range with two urethane acrylates. Rokracure VP 5661 and Rokracure VP 5762 are highly reactive, well-adherent and wetting main binders for lacquer and printing ink applications. The customer demands for higher hardening speeds in the urethane acrylate segment, in addition to optimized adhesion, have therefore been met.
In comparison to its di-functional predecessor Rokracure VP 5199, the tri-functional Rokracure VP 5661 combines good flexibility and adhesion with a high reactivity.
Rokracure VP 5762 has a functionality of 3,5 and a further increased reactivity and higher hardening values, without losing adhesion.
Both resins are also well-wetting and have a high chemical and water stability.
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Dokuments for downloading: >>data sheet Rokracure VP 5661<< and >>data sheet Rokracure VP 5762<<

29.01.2010
Tackifiers for low VOC flooring adhesives with German environmental label “Blue Angel”

Bremasin VP 5737 is a tackifier with low VOC-values in accordance with the EC1-norm, and fulfils the requirements under the German environmental label “Blue Angel” according to RAL UZ 113. Despite the modified structure, it can be emulsified just as well as the EC1 standard type Bremasin 1605 and shows excellent adhesion.
The additionally available extremely low viscous Bremasin VP 5770 is also ”RAL-conform”, and is used as a melting resin for hard resins. It does not only serve as a diluter or softener, but also improves adhesion properties. The special advantage of this new soft resin is that during the manufacturing of aqueous flooring adhesives, the use of high-boiling plasticizing or softening agents, such as adipates, citrates, dibentoates or styrolized phenol, can be avoided.
The technical datasheets of >>Bremasin VP 5737<< and >>Bremasin VP 5770<< can be downloaded.

23.03.2009
Sustainably bonding tackifiers

Bremasin 1900 series
     - hydrophobic resin ester with wide viscosity spectrum
     - emulsifiable
     - low VOC, wide compatibility, good water resistance
     - variable tack settings are possible
     - tackifier, fusing resin
     - 100% renewable resources

Bremasin VP 3288
     - polar, medium viscous resin ester
     - emulsifies very well
     - low VOC, high adhesion, high filling degree
     - tackifier, aqueous and 2K-PUR-glue
     - 100% renewable resources

Bremasin VP 3112
     - polar, low viscous resin ester
     - emulsifies very well
     - low VOC, wide compatibility, high filling degree
     - fusing resin
     - 100% renewable resources

Bremar VP 4834 / Bremar VP 5231
     - high viscous resin ester compounds
     - emulsifies well
     - low VOC, wide compatibility, high filling degree
     - high adhesion with variable adhesion / cohesion ratio
     - aqueous glues
     - 100% renewable resource

23.03.2009
Binders for sustainable coatings

Rokralux LE 158 W
     - 58% linseed oil
     - high viscous, emulsifiable binder
     - aqueous wood lacquers and glazes, metal lacquers
     - fast drying, glossy, hard
     - 100% renewable resources

Rokralux SBE 158 W
     - 58% sunflower oil
     - high viscous, emulsifiable binder
     - aqueous wood lacquers and glazes, wall paints
     - yellowing stability, fast drying, odourless
     - 100% renewable resources

Rokralux VP 5361
     - 61% soya bean oil
     - medium viscous, emulsifiable binder
     - aqueous wood glazes and impregnations, wall paints
     - yellowing stability, fast drying, odourless
     - 100% renewable resources

Rokralux VP 4908
     - 86% oil mixture
     - high viscous hard oil based on different stand oils
     - wood lacquers, glazes and impregnations, high solid
     - fast drying, water resistant
     - 100% renewable resources

Rokralux VP 5366
     - 80% soya bean oil
     - low viscous binder
     - wood care oils, wood glazes and impregnations, high solid
     - yellowing stability, odourless, water resistant
     - 100% renewable resources

23.03.2009
UV resins with sustainable advantages

Robert Kraemer offers a set of UV-curing resins with a high amount of renewable resources.
They are differntiated between main binders with a required quantity of 30-50%, combination resins (required quantity 20-30%) and adhesion resins (required qunatity 5-15%).
All resins have outstanding adhesion and wetting properties as well as a very high content of renewable resources up to 83%. Special modifications allow improvement of adhesion on different substates like metal or plastic.
Feel free to >>download<< further information as a PDF-file.

20.06.2008
Ecological polyols for 2K-PUR applications

With the products Rokrapol VP 5035, VP 5158, VP 5161 and VP 5162 Robert Kraemer provides ecological polyols which show in spite of the OH-functionality a high aliphatic tolerance. Thereby the adhesion properties on fatty and oily substrates will be increased. Because of the ecological modification the wetting properties will be improved in order to obtain higher pigment or filling rates. The high resistance of the resins results no changes in hardness, adhesion and flexibility of the film on water strain in long-term stress-test. The chemical resistance against sulphuric acid and alkaline media is given, too. Stress-tests with sundry solvents like MEK cause any damages on the film. The used content of renewable raw materials for the new polyols is between 92 and 100 %.