 Fluid, cold-stable, two-component washing compositions |
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| Optical information recording medium |
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| Optical recording disk |
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| Directed energy assisted in vacuo micro embossing |
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| Method for preparing poly-N-alkenylamines |
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| Polymeric Schiff's bases containing acetylene terminal groups |
| OF THE INVENTION It has been discovered that acetylene-substituted Schiff's bases can be prepared ... |
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| Physically optimized optical disc structure, method and apparatus |
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| Polycarbonate from carbonyl halide, bischloroformate and dihydric phenol |
| What is claimed is: 1. High molecular weight thermoplastic aromatic polycarbonate exhibiting ... |
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| Optically isotropic devices |
| OF THE INVENTION As indicated above, in many optical devices it is important that optical clarity ... |
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| Optical recording disk |
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Polymer mixture which comprises an aromatic polycarbonate resin and an impact strength-improving agent
| Details |
Inventors: Sederel, Willem L.;
Assignee: General Electric Company (Mt. Vernon, IN)
Primary Examiner: Pertilla; Theodore E.
Assistant Examiner:
Attorney, Agent or Firm: Barancik; Martin B.
The invention relates to polymer mixtures which comprise an aromatic polycarbonate resin, a block copolymer, and a graft copolymer. The polymer mixtures according to the invention have a good impact strength, in particular at low temperatures, and do not show any delamination phenomena when injection molded. |
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DETAILED DESCRIPTION I claim: 1.
A polymer mixture which comprises an aromatic polycarbonate resin and an impact strength-improving agent, characterized in that the polymer mixture comprises the following constituents: (a) 86-99% by weight of an aromatic polycarbonate resin; (b) 0.
5-4% by weight of one or more partially hydrogenated block copolymers consisting of at least two terminal polymer blocks A of a monoalkenyl-arylene having an average molecular weight of 5,000-125,000 and at least one intermediate polymer block B of a conjugated diene having an average molecular weight of 10,000-300,000, the terminal polymer blocks A forming 8-55% by weight of the block copolymer, while not more than 25% by weight of the aromatic double bonds of the polymer blocks A and at least 80% of the aliphatic double bonds of the polymer blocks B have been reduced by hydrogenation, and (c) 0.
5-10% by weight of one or more graft copolymers having an elastomeric core built up for more than 50% by weight from a polymerized diene, optionally a second phase built up from a polymerized vinyl monomer grafted on the core and having an enveloping phase (shell) built up from the polymerized product of one or more monomers selected from the group consisting of a C.
sub.
1 -C.
sub.
6 alkyl acrylate, a C.
sub.
1 -C.
sub.
6 alkyl methacrylate, acrylic acid, methacrylic acid and a mixture of one or more of the said monomers optionally with a cross-linking agent, which enveloping phase is grafted on the core and on the second phase optionally present, the quantities of a, b and c being calculated with respect to the overall quantity of a+b+c.
2.
A polymer mixture as claimed in claim 1, characterized in that the polymer mixture comprises the following constituents: (a) 90-99% by weight of aromatic polycarbonate resin; (b) 0.
5-3.
5% by weight of the block copolymer, and (c) 0.
5-6.
5% by weight of the graft copolymer.
3.
A polymer mixture as claimed in claim 1, characterized in that the graft copolymer comprises a core built up from a butadiene-styrene copolymer, a second phase of polystyrene and a third enveloping phase of methyl methacrylate and 1,3-butylene glycol dimethacrylate
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Manufacturing Materials 
