CLEAPSS DT - Supporting practical work in science, technology and art


MRATs - Resistant Materials
1 234
Showing results 1 to 4 of 91..

MRAT - Model Risk Assessment Introduction
MRATs
This edition (2016) is the sixth full version; it takes into account the reclassification of some substances and changes in nomenclature and values of exposure limits. These changes have not had much effect on the risk assessments because, in those cases where the revision was an increased hazard, the substance was already handled with maximum precautions.
more..
image of MRAT
MRAT - 1.001 - Adhesives: Acrylic Cement
MRATsProjects
Spreading cement on joint surfaces; pouring from a large stock container to smaller ones.
Tensol 12 cement contains methyl methacrylate in a solvent, usually methylene chloride or trichloroethylene (both non-flammable) but other cements could use highly flammable solvents.
Tensol 70 is a two-pack adhesive: pack A is methyl methacrylate polymer dissolved in the unpolymerised substance; pack B is di-benzoyl peroxide in dimethyl phthalate
more..
CLEAPSS DT Logo
MRAT - 1.002 - Adhesives: Cyanoacrylate
MRATsProjects
These adhesives are used in very small amounts and set by virtue of a moisture-catalysed polymerisation process. They form very strong instant bonds between non-absorbent surfaces, eg, metal, glass, plastics, rubber and hardwoods.
more..
CLEAPSS DT Logo
MRAT - 1.003 - Adhesives: Hot-Melt Glue Guns
MRATsProjects
Hot-melt adhesives are supplied as sticks of copolymers of ethene and vinyl acetate. Heat is used to melt the adhesive in the ‘glue gun’ so that drops can be applied to the materials to be joined. Bonding results when the glue solidifies on cooling. Many different types of gun are available with electric or butane cartridge heating and supplying glue at different rates.
more..
CLEAPSS DT Logo