Thixotropic reactive composition
AssigneeSika Technology AG
InventorDavid Tobler
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Abstract
The present invention relates to reactive compositions which at least one compound A having at least two reactive groups which are selected from the group comprising isocyanate, epoxide, alkoxysilane, and mixtures thereof and also at least one polymeric thixotropic agent B prepared by homopolymerizing a (meth)acrylate B1 or by copolymerizing a (meth)acrylate B1 with at least one further (meth)acrylate, the (meth)acrylate mixture possessing an average (meth)acrylate functionality ƒ of 2.5 to 4.5. The (meth)acrylate B1 here contains three or more (meth)acrylate groups. The invention additionally discloses the use of the compound B as a thixotropic agent.
Claims28
A composition comprising:
- at least one compound A having at least two reactive groups selected from the group comprising isocyanate, epoxide, alkoxysilane, and mixtures thereof, and
- at least one polymeric thixotropic agent B prepared by:
- homopolymerizing a (meth)acrylate B1, or
- copolymerizing a (meth)acrylate B1 with at least one further (meth)acrylate, the (meth)acrylate mixture possessing an average (meth)acrylate functionality ƒ of 2.5 to 4.5,
- wherein the (meth)acrylate B1 having three or more (meth)acrylate groups.
A process for enchancing thixotropic properties of a composition, comprising providing the composition with a compound B prepared by:
- homopolymerizing a (meth)acrylate B1, or
- copolymerizing a (meth)acrylate B1 with at least one further (meth)acrylate,
- the (meth)acrylate mixture having an average (meth)acrylate functionality ƒ of 2.5 to 4.5,
- the (meth)acrylate B1 having three or more (meth)acrylate groups.
Dependencies are inferred from the claim text.