Silicone adhesive

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Description

A water-resistant, flexible adhesive. Silicone adhesives contain easily hydrolyzable end groups, such as acetates, that are designed to crosslink (i.e. cure) when exposed to water vapor in the air. The type of end-group that is used will determine the type of emmissions that are release during curing. For example, the acetate engroups, such as acetoxy, will release acetic acid that is corrosive. An oxime end group release ketoxime and an alkoxy endgroup will release methanol. Most silicone adhesives cures at room temperature (RTV: Room Temperature Vulcanization) with 24 hours at ambient temperatures. Some can cure faster when heated or exposed to UV light.

Examples:

Product Cure process By-Product
Dowsil 744 RTV Adhesive Sealant alkoxy/methoxy methanol
Dowsil 781 Acetoxy Rapid-cure Silicone acetoxy Acetic acid
Dowsil 832 Multi-surface Adhesive Sealant alkoxy methaonl
Dowsil 1080 Oxime Sealant  Oxime ketoxime
Dowsil 3145 RTV MIL-A-46146 Adhesive Sealant alkoxy/methoxy methanol

Synonyms and Related Terms

silicone mastic (Br.); adhesivo de silicona (Esp.); colle silicone (Fr.); colla siliconica (It.); adesivo de silicone (Port.)

Applications

Collections Risks

May release Acetic acid or Methanol during cure

Links to Oddy Test results posted on AIC Wiki Materials Database Pages for individual materials below

Sources Checked for Data in Record

  • Irving Skeist, Handbook of Adhesives, Van Nostrand Reinhold Company, New York, 1977