METHOD OF RENDERING TRANSLUCENT SILICONE RUBBER ARTICLES TRANSPARENT

Mouldings of cured organopolysiloxane elastomers that have become merely translucent owing to surface irregularities are rendered transparent by coating them with a mixture of (1) a polysiloxane CH2=CHR2SiO(R nSiR2CH=CH2, wherein R and R' are Ph or Me (at least 80 mol-% Me) of viscosity is not...

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Bibliographic Details
Main Author VIRGIL L. METEVIA
Format Patent
LanguageEnglish
Published 23.12.1969
Subjects
ADHESIVES
CHEMICAL PAINT OR INK REMOVERS
CHEMISTRY
COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
CORRECTING FLUIDS
DYES
FILLING PASTES
INKS
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
ORGANIC MACROMOLECULAR COMPOUNDS
PAINTS
PASTES OR SOLIDS FOR COLOURING OR PRINTING
POLISHES
THEIR PREPARATION OR CHEMICAL WORKING-UP
USE OF MATERIALS THEREFOR
WOODSTAINS
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Summary:Mouldings of cured organopolysiloxane elastomers that have become merely translucent owing to surface irregularities are rendered transparent by coating them with a mixture of (1) a polysiloxane CH2=CHR2SiO(R nSiR2CH=CH2, wherein R and R' are Ph or Me (at least 80 mol-% Me) of viscosity is not 500 cSt./25 deg.C; (2) 5 to 50 wt.% (1) + (2) of a copolymer of siloxane units SiO2, (Ch3)3SiOo.5, with 1.5 to 3.5% vinyl groups with respect to (2) being present and the ratio of all (Ch3)3SiOo.5 and (Ch3)2CH2= CHSiOo.5 groups to SiO2 units being 0.6:1 to 1:1; (3) a siloxane that is compatible with (1) and (2), contains 0.1 to 1.7 weight-% of H atoms bound to Si and in which the remaining valencies of the Si atoms are saturated by phenyl or methyl residues, with at least two H atoms bound to Si atoms being present and the Si atoms carrying H atoms having methyl residues bound to them.
Bibliography:Application Number: USD3485662