Crosslinked polycarbonate and polylactic acid composition containing the same
AssigneesShimadzu Corporation, Mitsui Chemicals, Inc.
InventorsJiro Ishihara, Hiroki Kuyama, Eiichi Ozeki, Takeshi Ishitoku, Masahide Tanaka, Naoya Sakamoto
Life of this patent
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Abstract
A crosslinked polycarbonate is obtained by polycondensation of diol (A), trivalent or more polyhydric alcohol (B) whose arbitrary two hydroxy groups are not in the positional relationship of 1,2-disubstitution or 1,3-disubstitution, and carbonyl component (C) such as carbonic acid diesters. In the polycondensation step, no side reaction does not occur. This crosslinked polycarbonate is used as a modifier for polylactic acids. The brittleness of the polylactic acid is improved while maintaining mechanical strength, thermostability, and transparency.
Claims22
A crosslinked polycarbonate prepared by polycondensation of:
- (A) a diol;
- (B) a trivalent or more polyhydric alcohol whose arbitrary two hydroxy groups are not in the positional relationship of 1,2-disubstitution or 1,3-disubstitution, said alcohol (B) being a polyhydric alcohol adduct formed from the addition of at least n moles of at least one of ethylene oxide and propylene oxide to one mole of a polyhydric alcohol having n hydroxy groups, wherein n is an integer of at least 3;
- and
- (C) a carbonyl component selected from the group consisting of carbonic acid diesters, phosgene and equivalents thereof.
A process for producing a crosslinked polycarbonate, comprising conducting polycondensation of:
- (A) a diol;
- (B) a trivalent or more polyhydric alcohol whose arbitrary two hydroxy groups are not in the positional relationship of 1,2-disubstitution or 1,3-disubstitution, said alcohol (B) being a polyhydric alcohol adduct formed from the addition of at least n moles of at least one of ethylene oxide and propylene oxide to one mole of a polyhydric alcohol having n hydroxy groups, wherein n is an integer of at least 3;
- and
- (C) a carbonyl component selected from the group consisting of carbonic acid diesters, phosgene and equivalents thereof.
A polylactic acid type resin composition comprising a polylactic acid and a crosslinked polycarbonate comprising a polycarbonate derived from polycondensation of:
- (A) a diol;
- (B) a polyhydric alcohol having at least three hydroxy groups whose arbitrary two groups are not in the positional relationship of 1,2-disubstitution or 1,3-disubstitution;
- and
- (C) a carbonyl component selected from the group consisting of carbonic acid diesters, phosgene and equivalents thereof.
A crosslinked polycarbonate comprising a polycarbonate derived from polycondensation of:
- (A) a diol represented by the general formula (I):
- HO--R--OH (I)
- wherein R is a C4 to C20 alkylene group, linear or cyclic, which may include an ether linkage;
- (B) a polyhydric alcohol having at least three hydroxy groups whose arbitrary two groups are not in the positional relationship of 1,2-disubstitution or 1,3-disubstitution;
- and
- (C) a carbonyl component selected from the group consisting of carbonic acid diesters, phosgene and equivalents thereof.
A process for producing a crosslinked polycarbonate comprising conducting polycondensation by reacting together:
- (A) a diol represented by the general formula (I):
- HO--R--OH (I)
- wherein R is a C4 to C20 alkylene group, linear or cyclic, which may include an ether linkage;
- (B) a polyhydric alcohol having at least three hydroxy groups whose arbitrary two groups are not in the positional relationship of 1,2-disubstitution or 1,3-disubstitution;
- and
- (C) a carbonyl component selected from the group consisting of carbonic acid diesters, phosgene and equivalents thereof.
Dependencies are inferred from the claim text.