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US 7,247,694 B2Granted
PMI syrup phases and their use for stabilizing insoluble additives
AssigneeRohm Co., Ltd.
InventorsPeter Stein, Werner Geyer, Thomas Barthel
Life of this patent
Estimating the term…
Abstract
By using a high molecular weight syrup phase comprising PMMA or PMMI, it is possible to distribute fillers in the polymerization batch so that the distribution of the fillers remains homogeneous during the polymerization. A homogeneous foam results.
Claims9
A process for the preparation of a material, said process comprising:
- preparing a copolymer of a vinylically unsaturated carboxylic acid and a vinylically unsaturated carboxylic acid derivative by a casting method, wherein the polymerization is carried out in a syrup phase, of a polymer soluble in a monomer mixture required for the preparation of polymethacrylimide;
- wherein the material comprises between 0 and 400 parts by weight, based on the total mass of polymerizable groups, of fractions which are insoluble in the reaction mixture required for the preparation of the material;
- and
- wherein the material is a foam.
1 more element
A material prepared by a process, comprising:
- preparing a copolymer of a vinylically unsaturated carboxylic acid and a vinylically unsaturated carboxylic acid derivative by a casting method, wherein the polymerization is carried out in a syrup phase, of a polymer soluble in a monomer mixture required for the preparation of polymethacrylimide;
- wherein the material comprises between 0 and 400 parts by weight, based on the total mass of polymerizable groups, of fractions which are insoluble in the reaction mixture required for the preparation of the material;
- and
- wherein the material is a foam.
1 more element
Dependencies are inferred from the claim text.