Polysiloxane Compositions
AssigneeDow Corning S. A.
InventorsDominique Culot, Patrick Deglasse, Sesto Di Marco, Jean Iker
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Abstract
The present invention discloses the use of a polymer chain having at least one carboxylic acid anhydride group as a consistency stabilizer in the base part of a two-part silicone sealant. The base part consists essentially of the consistency stabilizer, 100 parts by weight of a polymeric material having not less than two groups bonded to silicon which are hydroxyl or hydrolysable groups, 5 to 150 parts by weight of filler and, optionally, pigments and/or plasticizers.
Claims22
A method of stabilizing the slump characteristics, over time, of a base composition consisting essentially of mixing 100 parts by weight of a polymeric material having not less than two groups bonded to silicon which are hydroxyl or hydrolysable groups, 5 to 150 parts by weight of filler, and any amount of slump-stabilizing polymer having attached to its polymer chain at least one carboxylic acid anhydride group where said amount is sufficient to stabilize the slump characteristics over a storage time period, to obtain a base composition with a desired slump property, and storing the resulting base composition for a period of time where the slump property of the base composition remains substantially the same over said time period.
Dependencies are inferred from the claim text.