A2695水性固化剂科思创一级代理商源禾缘禾

Bayhydrol A XP 2770

Solubility / thinnability    Bayhydrol® A XP 2770can be thinned with water in 

                            any ratio.

Properties / Applications   Bayhydrol® A XP 2770 is ahydroxyfunctional 

                           polyacrylic dispersion which can be thinned with

                           water to application viscosity. Bayhydrol® A XP 

                           2770 combined with aliphatic polyisocyanates 

                           yields high-gloss top coats which can be dried
                           at room temperature or force-dried, e.g.at 80℃
                          The cured paint films are hard and flexible with

                          outstanding resistance to solvents and water and

                          excellent weatherability.
                          When properly formulated, e.g.in combination with

                          Bayhydur® 304 in an NCO / OH ratio of 1.5 : 1, 

                          the pot life is approx. 4 hours.
                          Bayhydrol® A XP 2770 has good pigment wetting 

                          properties and high shear stability. Bead mills 

                          have proved suitable as grinding equipment. Only
                          pigments and extenders with a minimum water-soluble

                          content should be used. Given the many pigments

                          and extenders available, compatibility testing
                          should always be carried out.
                          When mixing Bayhydur® or Desmodur® into the mill 

                          base, a thickener must be added to ensure a high

                          shear effect.
                          The addition of approximately 0.4 % Borchigen® 

                          PW 25 (calculated on the solid binder) has proved 

                          suitable for formulations based on Bayhydrol® A

                          XP 2770.
                          Levelling and substrate wetting can be optimised 

                          by adding, for example Byk® 349 and Byk® 378. 

                          Byk® 011 has proved to be a suitable antifoam.
                          Application and formulation equipment can be cleaned 

                          with water, alkaline cleaning agents or isopropanol.

Storage                   - Storage in original sealed Bayer MaterialScience

                            containers.
                          - Recommended storage temperature: > 0 - 30 °C.
                          - Protect from frost, heat and foreign material.

                          General information: Short-time cooling down to

                          -18 °C does not typically damage the product. 

                          Prolonged freezing can damage the product 

                          irreversibly.
                          Prolonged storage at higher temperatures may result

                          in a decrease of viscosity and/or an increase of 

                          average particle size, possibly resulting in 

                          sedimentation or coagulation.
                          The viscosity of the product is largely governed

                          by the pH. As the pH may decrease during storage, 

                          a decrease in viscosity is also to be expected. The
                          viscosity can be adjusted to its original value by

                          the addition of small amounts of an aqueous 10 %

                          solution of dimethyl ethanol amine.
                          Contamination with certain bacteria, fungi or algae

                          may render the product unusable.

Storagetime              Bayer MaterialScience represents that, for a period 

                          of six months following the day of shipment as stated 

                          in the respective transport documents, the product
                          will meet the specifications or values set forth in 

                          section "specifications or characteristic data" above

                          what ever is applicable, provided that the product is
                          stored in full compliance with the storage conditions 

                          set forth in and referenced under section "storage" 

                          above and is otherwise handled appropriately.
                          The lapse of the six months period does not 

                           necessarily meanthat the product no longer meets 

                           specificationsor the set values. However, prior to 

                           usingsaid product,  Bayer MaterialSciencerecommends 

                           totest such a product if it still meets the 

                           specificationsor the set values.  Bayer 

                          MaterialScience does not make any representation

                          regarding the product after the lapse of the six 

                           months periodand Bayer MaterialScience shall not 

                           be responsible  or liable in any way for the 

                           product failing to meet  specifications or the 

                           setvalues   after the lapse of the six months

                          period

Safety                    Hazards identification Not classified as a hazardous 

                          product as per Council Directive 2006/121/EC or 

                          1999/45/EC.
                          The safety data sheet should be observed.Thiscontains 

                          information on labeling, transport and storage aswell 

                          as on handling, product safety and ecology.

Important                 This is a Trial Product of which we do not yet have 

                          extensive experience.
                          No guarantee can therefore be given regarding the 

                          behaviour of the product during processing or use.

Compatibility               Suitable co-reactants for the formulation of 

                            aqueous two-component polyurethane systems include 

                            Desmodur® N 3400, N 3600, N 3800 or N 3900,
                            Bayhydur® 3100, 304, 305, 401-70, XP 2487/1, 

                            XP 2655 or XP 2759.