Back to results
US 7,605,193 B2Granted
PMMA moulding compounds with improved impact resistance
AssigneeRoehm GmbH
InventorsKlaus Schultes, Thomas Suefke, Reiner Mueller, Thomas Arndt, Goerg Michler, Joachim Laatsch
Life of this patent
Estimating the term…
Abstract
The invention describes a novel impact modifier, built up from core-shell1- and shell 2, the core being capable of plastic deformation. Good mechanical properties were achieved using a small amount of impact modifier.
Claims9
An impact resistant modifier consisting of at least one multistage emulsion polymer of bonded units of:
- i) a core (C) of the following polymerized monomeric components:
- a) from 53 to 92.9% by weight of C1-C8-alkyl methacrylate,
- b) from 7 to 35% by weight of C1-C8-alkyl acrylate,
- c) from 0.1 to 2% by weight of at least one crosslinker, and
- d) from 1 to 5% by weight of one or more styrene derivatives;
- ii) a first shell (S1) of the following polymerized monomeric components:
- a) from 75 to 99.9% by weight of at least one C1-C8-alkyl acrylate,
- b) from 0 to 25% by weight of one or more styrene derivatives, and
- c) from 0.1 to 2% by weight of at least one crosslinker, and
- iii) a second shell (S2), of the following polymerized monomeric components:
- a) from 80 to 100.00% by weight of at least one C1-C8-alkyl methacrylate,
- b) from 0 to 20% by weight of at least one C1-C8-alkyl acrylate, and
- c) from 0 to 5% by weight of at least one regulator.
10 more elements
A molding comprising a molding composition comprising from 3 to 80% by weight of the impact modifier consisting of a multistage emulsion polymer of bonded units of:
- i) a plastically deformable core (C) of the following polymerized monomeric components:
- a) from 53 to 92.9% by weight of C1-C8-alkyl methacrylate,
- b) from 7 to 35% by weight of C1-C8-alkyl acrylate,
- c) from 0.1 to 2% by weight of at least one crosslinker, and
- d) from 1 to 5% by weight of one or more styrene derivatives;
- ii) an elastomeric first shell (S1) of the following polymerized monomeric components:
- a) from 75 to 99.9% by weight of at least one C1-C8-alkyl acrylate,
- b) from 0 to 25% by weight of one or more styrene derivatives, and
- c) from 0.1 to 2% by weight of at least one crosslinker, and
- iii) a hard second shell (S2), of the following polymerized monomeric components:
- a) from 80 to 100.00% by weight of at least one C1-C8-alkyl methacrylate,
- b) from 0 to 20% by weight of at least one C1-C8-alkyl acrylate, and
- c) from 0 to 5% by weight of at least one regulator, and from 97 to 20% by weight of a thermoplastic molding composition comprising polymerized units of methyl methacrylate.
10 more elements
An impact resistant modifier consisting of at least one multistage emulsion polymer of bonded units of:
- i) a core (C) of the following polymerized monomeric components:
- a) from 53 to 92.9% by weight of C1-C8-alkyl methacrylate,
- b) from 7 to 35% by weight of C1-C8-alkyl acrylate,
- c) from 0.1 to 2% by weight of at least one crosslinker, and
- d) from 1 to 5% by weight of one or more styrene derivatives;
- ii) a first shell (S1) of the following polymerized monomeric components:
- a) from 75 to 99.9% by weight of at least one C1-C8-alkyl acrylate,
- b) from 0 to 25% by weight of one or more styrene derivatives, and
- c) from 0.1 to 2% by weight of at least one crosslinker, and
- iii) a second shell (S2), of the following polymerized monomeric components:
- a) from 80 to 100.00% by weight of at least one C1-C8-alkyl methacrylate,
- b) from 0 to 20 % by weight of at least one C1-C8-alkyl acrylate, and
- c) from 0.1 to 1% by weight of at least one regulator, wherein % by weight is based on the entirety of monomers and regulator in S2.
10 more elements
A molding comprising a molding composition comprising from 3 to 80% by weight of the impact modifier consisting of a multistage emulsion polymer of bonded units of:
- i) a plastically deformable core (C) of the following polymerized monomeric components:
- a) from 53 to 92.9% by weight of C1-C8-alkyl methacrylate,
- b) from 7 to 35% by weight of C1-C8-alkyl acrylate,
- c) from 0.1 to 2% by weight of at least one crosslinker, and
- d) from 1 to 5% by weight of one or more styrene derivatives;
- ii) an elastomeric first shell (S1) of the following polymerized monomeric components:
- a) from 75 to 99.9% by weight of at least one C1-C8-alkyl acrylate,
- b) from 0 to 25% by weight of one or more styrene derivatives, and
- c) from 0.1 to 2% by weight of at least one crosslinker, and
- iii) a hard second shell (S2), of the following polymerized monomeric components:
- a) from 80 to 100.00% by weight of at least one C1-C8-alkyl methacrylate,
- b) from 0 to 20% by weight of at least one C1-C8-alkyl acrylate, and
- c) from 0.1 to 1% by weight of at least one regulator, and from 97 to 20% by weight of a thermoplastic molding composition comprising polymerized units of methyl methacrylate.
10 more elements
Dependencies are inferred from the claim text.