Document Sample

                                                                                                              John Burn & Co. (B’ham) Ltd
                                                                                                              74 Albert Road
                                                                                                              Birmingham B33 9AJ

                                                                                                               t +44 (0) 121 508 4144
                                                                                                               f +44 (0) 121 508 4145
                                                                                                               e info@johnburn.co.uk
                                                                                                               w www.johnburn.co.uk

                                                   BURNCO SILICONE RUBBER
                                                     c/w CLEAR CATALYST
             1.       DESCRIPTION
             Burnco Silicone Rubber & Clear Catalyst is a two part addition cure liquid silicone elastomer, curing at room temperature
             to a tough, 40 shore A elastic material with very good clarity.

             2.        ADVANTAGES
                         High tear strength
                         Extremely low shrinkage
                         Precise reproduction
                         High chemical resistance
                         Can be heat accelerated (This will increase shrinkage factor).

             3.       APPLICATIONS
             Moulds where a high degree of dimensional stability is required, such as engineering, model making, ceramics, low melt
             alloy casting.

             4.        CHARACTERISTICS
             a)        Constituents              Silicone Rubber             Catalyst

                       Appearance                Fluid                       Fluid
                       Colour                    Translucent                 Translucent
                       Specific Gravity @ 25C   1.09                        1.2
                       Viscosity                 45,000                      1500

             b)        MIXING
             Silicone Rubber:           100 parts by weight         Pot Life of Mix @ 25 C: 1.5 hours
             Catalyst:                  10 parts by weight          Demould time @ 25 C: 25 hours

             c)       AFTER CROSS LINKING                                               5.       PACKAGING
             Shore Hardness / A (ASTM D2 240 6mm Film)             40                  Burnco Silicone Rubber and Clear Catalyst is
             Tensile Strength / Mpa (DIN 53504)                     8.2                 available in 1kg and 5kg kits.
             Elongation at break / % (DIN 53504)                    360
             Tear Strength / KN/m (ASTM D624 notched Die B)         20
             Linear Shrinkage / %                                   0.1

             6.        INHIBITION
             Burnco Silicone Rubber and Clear Catalyst is a polyaddition type of silicone elastomer and may be inhibited by various
             substances (ie. water, tin, salts, sulphur, amines contained in natural rubber, condensation, cure silicone rubber and some
             epoxy materials etc.). It is therefore recommended that before use, trials should be carried out by the customer to ascertain
             the suitability of Burnco Silicone Rubber and Clear Catalyst for the given application.

             7.        HEALTH & SAFETY
             The use of this product and of its catalyst necessitates certain precautions. Avoid swallowing, contact with the skin and the
             eyes. If contact does occur, wash with clean water immediately, and in the case of contact with the eyes, consult a doctor.

             8.       SHELF LIFE
             Burnco Silicone Rubber and Clear Catalyst has a minimum shelf life of six months when stored in the original unopened
             containers at a temperature between 18 and 30C.

             The information contained in this document is the result of careful test carried out objectively. It has
             been produced to aid customers, but without implying any commitment on our part.
                                                                                                        Directors: N C Jennens, Polly Jennens, B Greensill
Established 1904                                                                                        Registered in England No. 151048

Shared By: