EP0239157A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Polymer mixture which comprises an aromatic polycarbonate, a polybutylene terephtalate and an agent to improve the impact strength
Assignee: General Electric Co
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Filing: 1987-03-10
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Granted: —
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Expires: 2007-03-10
Abstract
Abstract The invention relates to polymer mixtures which comprise an aromatic polycarbonate, a polybutylene terephthalate and an agent to improve the impact strength. By using an aromatic polycarbonate and polybutylene terephthalate having a comparatively low intrinsic viscosity, a polymer mixture is obtained which has both a good impact strength at low temperatures and good flow properties.
Inventors
- 👤 Jeroen Johannes Verhoeven
- 👤 Raymond Albert Pearson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-10 02:29
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08L69/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
77 words
A polymer mixture which comprises an aromatic polycarbonate, a polyalkylene terephthalate and an agent to improve the impact strength, characterized in that the polymer mixture comprises an aromatic polycarbonate having an intrinsic viscosity of less than 52 ml/g, measured in methylene chloride at 25°C and a polybutylene terephthalate having an intrinsic viscosity of less than l05 ml/g, measured in a 60/40 (wt./wt.) phenol/tetrachloroethane mixture at 30°C and in that the polymer mixture does not comprise glass fibres.
Claim 2
Dependent Claim
77 words
A polymer mixture which comprises an aromatic polycarbonate, a polyalkylene terephthalate and an agent to improve the impact strength, characterized in that the polymer mixture comprises an aromatic polycarbonate having an intrinsic viscosity of less than 52 ml/g, measured in methylene chloride at 25°C and a polybutylene terephthalate having an intrinsic viscosity of less than l05 ml/g, measured in a 60/40 (wt./wt.) phenol/tetrachloroethane mixture at 30°C and in that the polymer mixture does not comprise glass fibres.
Claim 3
Dependent Claim
26 words
A polymer mixture as claimed in Claim l, characterized in that the weight ratio of the aromatic polycarbonate to the polybutylene terephthalate is more than 0.9.
Claim 4
Dependent Claim
48 words
A polymer mixture as claimed in Claim l, characterized in that the polymer mixture comprises 5-30% by weight of the agent to improve the impact strength calculated with respect to the total quantity of the aromatic polycarbonate, the polybutylene terephthalate and the agent to improve the impact strength.
Claim 5
Dependent Claim
40 words
A polymer mixture as claimed in Claim l, characterized in that the polymer mixture comprises 0-40% by weight of additives calculated with respect to the total quantity of aromatic polycarbonate, polybutylene terephthalate and the agent to improve the impact strength.
Claim 6
Dependent Claim
40 words
A polymer mixture as claimed in Claim l, characterized in that the polymer mixture comprises as a polybutylene terephthalate a polymer or copolymer which is built up for more than 90 mol.% from units derived from terephthalic acid and butane-l,4-diol.
Claim 7
Dependent Claim
47 words
A polymer mixture as claimed in Claim l, characterized in that the polymer mixture comprises as an agent to improve the impact strength a core-shell polymer which is prepared in several steps and consists of a rubber-like core on which one or more shells have been grafted.
Claim 8
Dependent Claim
53 words
A polymer mixture as claimed in Claim 7, characterized in that the agent to improve the impact strength is built up from a rubber-like core having more than 50 mol.% of units derived from butadiene and at least one shell having more that 50 mol.% of units derived from a C 1-6 alkylmethacrylate.
Claim 9
Dependent Claim
16 words
Articles formed from the polymer mixture as claimed in one or more of the preceding Claims.
References Cited (Backward Citations)
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