초록

The invention relates to a moulding composition and to the mouldings which can be produced therefrom. Due to their good resistance in the hot water cycle test and in the hot-water/isopropanol test, the plastics mouldings have particularly good suitability for the production of sanitary components.

대표청구항 ▼

The invention claimed is: 1. An impact-modified polymethyl methacrylate molding composition resistant to hot water cycles, wherein said impact-modified polymethyl methacrylate molding composition consists essentially of: 1) from 70 wt. % to 99 wt. % of a polymethyl methacrylate matrix composition h

The invention claimed is: 1. An impact-modified polymethyl methacrylate molding composition resistant to hot water cycles, wherein said impact-modified polymethyl methacrylate molding composition consists essentially of: 1) from 70 wt. % to 99 wt. % of a polymethyl methacrylate matrix composition having an average molar mass molecular weight of from 130,000 g/mol to 190,000 g/mol, wherein said polymethyl methacrylate matrix composition consists essentially of: a) from 80 wt. % to 99.5 wt. % methyl methacrylate; and b) from 0.5 wt. % to 20.0 wt. % vinylic comonomer; and 2) from 1 wt. % to 15 wt. % of an impact-modifier composition in the form of a crosslinked elastomeric particle, wherein said impact-modifier composition consists essentially of: a) from 50 wt. % to 70 wt. % methyl methacrylate; b) from 20 wt. % to 40 wt. % butyl acrylate, butadiene, or both; c) from 0.1 wt. % to 2 wt. % allyl methacrylate; and d) from 0.5 wt. % to 5 wt. % vinylic comonomer. 2. The impact-modified polymethyl methacrylate molding composition resistant to hot water cycles according to claim 1, wherein said vinylic comonomer of said polymethyl methacrylate matrix composition and said vinylic comonomer of said impact-modifier composition is one or more vinylic comonomers selected from the group consisting of an alkyl acrylate, an alkyl methacrylate, and styrene. 3. The impact-modified polymethyl methacrylate molding composition resistant to hot water cycles according to claim 2, wherein said one or more vinylic comonomers is an alkyl acrylate selected from one or more C1-C4 alkyl acrylates. 4. The impact-modified polymethyl methacrylate molding composition resistant to hot water cycles according to claim 2, wherein said one or more vinylic comonomers is an alkyl methacrylate selected from one or more C1-C4 alkyl methacrylates. 5. The impact-modified polymethyl methacrylate molding composition resistant to hot water cycles according to claim 2, wherein said one or more vinylic comonomers is styrene. 6. The impact-modified polymethyl methacrylate molding composition resistant to hot water cycles according to claim 1, wherein said crosslinked elastomeric particle of said impact-modifier composition has an average particle size of from 100 nm to 500 μm. 7. The impact-modified polymethyl methacrylate molding composition resistant to hot water cycles according to claim 1, wherein said impact-modified polymethyl methacrylate molding composition exhibits a flowability of about 10.0 cm3/10 minutes. 8. The impact-modified polymethyl methacrylate molding composition resistant to hot water cycles according to claim 1, wherein said impact-modified polymethyl methacrylate molding composition exhibits a Vicat softening temperature of greater than 105�� C. 9. An article consisting essentially of said impact-modified polymethyl methacrylate molding composition resistant to hot water cycles according to claim 1. 10. The article according to claim 9, wherein said article is selected from the group consisting of a sheet, a shower tray, a bathtub, and a sunbed roof. 11. A process of producing an article comprising melting said impact-modified polymethyl methacrylate molding composition resistant to hot water cycles according to claim 1 to produce a melted impact-modified polymethyl methacrylate molding composition, and extruding or injection molding said melted impact-modified polymethyl methacrylate molding composition to produce said article. 12. The process of producing an article according to claim 11, wherein said article is selected from the group consisting of a sheet, a shower tray, a bathtub, and a sunbed roof. 13. The impact-modified polymethyl methacrylate molding composition resistant to hot water cycles according to claim 1, wherein the impact-modified polymethyl methacrylate molding composition further consists essentially of: 3) the balance being additives. 14. The impact-modified polymethyl methacrylate molding composition resistant to hot water cycles according to claim 1, wherein the impact-modified polymethyl methacrylate molding composition further consists essentially of: 3) the balance being additives in an amount of up to about 1.6 wt. %. 15. The impact-modified polymethyl methacrylate molding composition resistant to hot water cycles according to claim 1, wherein the impact-modified polymethyl methacrylate molding composition further consists essentially of: 3) the balance being additives in an amount of up to about 0.2 wt. %.