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US 12,723,134 B2Granted
Modeling material and method for the production thereof
AssigneeStaedtler SE
InventorsDenise Schneider, Sabina Herdegen, Mathias Belzner
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Abstract
An oven-hardening modeling material, at least including a binder and a softener, the binder and the softener being in the form of a plastisol, the plastisol being essentially composed of PVC and plasticizer and the mass having an overall plasticizer content of 32 to 60 wt. %.
Claims7
A method for producing an oven-hardenable modeling clay including a binder and a plasticizer, the binder and the plasticizer being a plastisol, the plastisol consisting essentially of PVC and plasticizer, wherein the plasticizer is a phthalate-free plasticizer, wherein the modeling clay comprises:
- 45-63 wt. % binder,
- 38-52 wt. % plasticizers,
- 0-17 wt. % filler,
- 0-15 wt. % other additives, the method comprising the steps of:
- mixing a PVC powder, having surface areas and containing agglomerates, and an amount of plasticizer with any other supplements and/or additives at a mixing temperature of 58 to 65° C. to initiate agglomerate disintegration during the mixing so as to generate additional surface areas in the PVC powder;
- adding an additional amount of the plasticizer during the mixing step, wherein the phthalate-free plasticizer is based on citric acid.
3 more elements
Dependencies are inferred from the claim text.