Loading patent…
AssigneeGeneral Electric Company
InventorsTakeshi Sakashita, Tomoaki Shimoda, Takashi Nagai, Tetsuji Kodaira
Estimating the term…
A heat resistant copolycarbonate comprises a component of the formula: ##STR1## and a component selected from: ##STR2## R.sup.1 and R.sup.2 are same or different halogens or monovalent hydrocarbons, R.sup.3, R.sup.4, R.sup.6 and R.sup.7 are hydrogen atoms or monovalent hydrocarbons, R.sup.5 and R.sup.8 are bivalent hydrocarbons, R.sup.a, R.sup.b, R.sup.c R.sup.d, R.sup.e, R.sup.f, R.sup.g R.sup.j, R.sup.k and R.sup.l are the same or different halogen atoms, hydrocarbon groups having 1-10 carbon atoms, or hydrocarbon groups having 1-10 carbon atoms which are at least partially halogen-substituted and R.sup.b and R.sup.c may also be hydrogen, m, n, s, t, u, v and w are integers from 0-4, p and q are integers from 0-3 and r is an integer from 1-10.
A copolycarbonate comprising a first component of the formula ##STR13## wherein R.sup.1 and R.sup.2 are halogen atoms or univalent hydrocarbon groups which may be halogen-substituted and may be the same or different, m and n are integers from 0-4 and ##STR14## R.sup.3 and R.sup.4 are hydrogen atoms or monovalent hydrocarbon groups, and R.sup.5 is a bivalent hydrocarbon group and a second component selected from the group consisting of a component having the formula ##STR15## wherein R.sup.a, R.sup.b, R.sup.c, and R.sup.d are halogen atoms, hydrocarbon groups having 1-10 carbon atoms, or hydrocarbon groups having 1-10 carbon atoms which are at least partially halogen-substituted, R.sup.a, R.sup.b, R.sup.c, and R.sup.d may be the same or different, and R.sup.b and R.sup.c may be hydrogen atoms and p and q are integers from 0-3, a component of the formula ##STR16## wherein R.sup.e, R.sup.f, and R.sup.g are halogen atoms, hydrocarbon groups having, 1-10 carbon atoms, or hydrocarbon groups having 1-10 carbon atoms which are at least partially halogen-substituted, and R.sup.e, R.sup.f, and R.sup.g may be the same or different, r is an integer of from 1 to 10, s and t are integers from 0 to 4 and Y is ##STR17## R.sup.6 and R.sup.7 are hydrogen atoms or monovalent hydrocarbon groups, and R.sup.8 is a bivalent hydrocarbon group, and a component of the formula ##STR18## wherein R.sup.j, R.sup.k and R.sup.l are halogen atoms, hydrocarbon groups having 1-10 carbon atoms, or hydrocarbon groups having 1-10 carbon atoms which are at least partially halogen-substituted, and R.sup.j, R.sup.k, and R.sup.l may be the same or different and u, v and w are integers from 0-4.
The copolycarbonate of clairm 1 wherein the molar ratio of the first component to the second component is from 98/2 to 1/99.
A method for manufacturing a copolycarbonate composition comprising melt polycondensing an aromatic dihydroxy compound of the formula ##STR19## wherein R.sup.1 and R.sup.2 are halogen atoms or univalent hydrocarbon groups which may be halogen-substituted and may be the same or different, m and n are integers from 0-4 and ##STR20## R.sup.3 and R.sup.4 are hydrogen atoms or monovalent hydrocarbon groups, and R.sup.5 is a bivalent hydrocarbon group, and a second component selected from the group consisting of a component having the formula and an aromatic dihydroxy compound of the formula selected from the group consisting of ##STR21## wherein R.sup.a, R.sup.b, R.sup.c, and R.sup.d are halogen atoms, hydrocarbon groups having 1-10 carbon atoms, or hydrocarbon groups having 1-10 carbon atoms which are at least partially halogen-substituted, R.sup.a, R.sup.b, R.sup.c, and R.sup.d may be the same or different, and R.sup.b and R.sup.c may be hydrogen atoms and p and q are integers from 0-3, ##STR22## wherein R.sup.e, R.sup.f, and R.sup.g are halogen atoms, hydrocarbon groups having 1-10 carbon atoms, or hydrocarbon groups having 1-10 carbon atoms which are at least partially halogen-substituted, R.sup.e, R.sup.f, and R.sup.g may be the same or different, r is an integer of from 1 to 10, s and t are integers from 0 to 4 and Y is ##STR23## R.sup.6 and R.sup.7 are hydrogen atoms or monvalent hydrocarbon groups, and R.sup.8 is a bivalent hydrocarbon group, ##STR24## wherein R.sup.j, R.sup.k and R.sup.l are halogen atoms, hydrocarbon groups having 1-10 carbon atoms, or hydrocarbon groups having 1-10 carbon atoms which are at least partially halogen-substituted, R.sup.j R.sup.k and R.sup.l may be the same or different, and u, v and w are integers from 0-4 and a carbonic acid diester in the presence of a catalyst comprising an alkali metal compound or alkaline earth metal compound to obtain a polycondensation product and adding to the polycondensation product an acidic compound.
Dependencies are inferred from the claim text.