Impact-modified polycarbonate blends
First Claim
Patent Images
1. A thermoplastic molding composition comprisingA) from 40 to 90 parts by weight of aromatic poly(ester) carbonate having a weight-average molecular weight Mw≧
- 25,000 g/mol.,B) from 0.5 to 12 parts by weight of polyalkylene terephthalate,C) from 1 to 20 parts by weight of graft (co)polymer consisting of from 10 to 90 wt. % (based on the weight of the graft (co)polymer) of a graft base having a glass transition temperature below 0°
C., and from 90 to 10 wt. % (based on the weight of the graft (co)polymer) of polymerized vinyl monomers as a grafted phase, the vinyl monomers containing at least 20 wt. % (based on the weight of the grafted phase) of acrylate monomers,D) an oligomeric organic phosphonic acid ester or from 2 to 20 parts by weight of an oligomeric organic phosphoric acid ester, andE) from 0 to 1 part by weight of fluorinated polyolefin,the sum of the parts by weight of all the components A) through E) being 100.
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Abstract
A thermoplastic molding composition having improved flammability rating and mechanical properties is disclosed. The composition contains aromatic polycarbonate having a weight-average molecular weight Mw≧25,000 g/mol., polyalkylene terephthalate, graft (co)polymer characterized in that its grafted phase includes structural units derived from acrylate monomers, an oligomeric organic phosphoric acid ester, and an optional fluorinated polyolefin. In a preferred embodiment the graft (co)polymer is characterized in its core-shell morphology.
32 Citations
20 Claims
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1. A thermoplastic molding composition comprising
A) from 40 to 90 parts by weight of aromatic poly(ester) carbonate having a weight-average molecular weight Mw≧ - 25,000 g/mol.,
B) from 0.5 to 12 parts by weight of polyalkylene terephthalate, C) from 1 to 20 parts by weight of graft (co)polymer consisting of from 10 to 90 wt. % (based on the weight of the graft (co)polymer) of a graft base having a glass transition temperature below 0°
C., and from 90 to 10 wt. % (based on the weight of the graft (co)polymer) of polymerized vinyl monomers as a grafted phase, the vinyl monomers containing at least 20 wt. % (based on the weight of the grafted phase) of acrylate monomers,D) an oligomeric organic phosphonic acid ester or from 2 to 20 parts by weight of an oligomeric organic phosphoric acid ester, and E) from 0 to 1 part by weight of fluorinated polyolefin, the sum of the parts by weight of all the components A) through E) being 100. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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9. The composition according to claim 8, wherein q is 1 to 5.
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10. The composition according to claim 9, wherein q is 1 to 2.
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11. The composition according to claim 8, wherein X represents a member selected from the group consisting of
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12. The composition according to claim 11, wherein X is a derivative of hydroquinone, resorcinol or bisphenol A.
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13. The composition according to claim 1, containing
from 50 to 80 parts by weight of component A), from 1 to 10 parts by weight of component C), from 2 to 15 parts by weight of component D). -
14. The composition according to claim 1, containing from 5 to 10 parts by weight of component B).
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15. The composition according to claim 1, wherein Component B) is polyethylene terephthalate.
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16. The composition of claim 1 wherein the graft (co)polymer has a core-shell morphology.
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17. A molded article comprising the composition of claim 1.
- 25,000 g/mol.,
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18. A thermoplastic molding composition comprising
A) from 40 to 90 parts by weight of aromatic poly(ester) carbonate having a weight-average molecular weight Mw≧ - 25,000 g/mol.,
B) from 0.5 to 12 parts by weight of polyalkylene terephthalate, C) from 1 to 20 parts by weight of graft (co)polymer consisting of from 10 to 90 wt. % (based on the weight of the graft (co)polymer) of a graft base having a glass transition temperature below 0°
C., and from 90 to 10 wt. % (based on the weight of the graft (co)polymer) of polymerized vinyl monomers as a grafted phase, the vinyl monomers containing at least 20 wt. % (based on the weight of the grafted phase) of acrylate monomers,D) from 2 to 20 parts by weight of an oligomeric organic phosphoric acid ester, E) from 0 to 1 part by weight of fluorinated polyolefin, and F) from 0 to 10 parts by weight of at least one additive selected from the group consisting of lubricants, mold-release agents, nucleating agents, antistatic agents, stabilisers, colorants, fillers, reinforcing agents, flameproofing agents other than component D), and flameproofing synergists, the sum of the parts by weight of all the components A) through F) being 100. - View Dependent Claims (19, 20)
- 25,000 g/mol.,
Specification