摘要:
A process for the production of polyester is disclosed, comprising feeding an ester compound made mainly of terephthalic acid and ethylene glycol or an oligomer thereof to a final polymerization reactor, and then polymerizing it in the form of fine molten particles in an inert gas stream, wherein the ester compound has an intrinsic viscosity [.eta.] of not more than 0.4 dl/g and a carboxyl terminal group concentration [COOH] of not more than 90.times.[.eta.].sup.-0.4 .mu.eq/g, and the fine particles have an average particle diameter of from 0.015 to 0.5 mm.
摘要:
A process for the production of polyester comprising at least 80% of an ethylene terephthalate repeating unit using as a starting material an ester compound made mainly of terephthalic acid and ethylene glycol or an oligomer thereof is disclosed. This process is characterized in that a prepolymer having an intrinsic viscosity of not more than 0.4 dl/g and a carboxyl terminal group concentration [COOH] of not more than 90.times.[.eta.].sup.-0.4 .mu.eq/g is fed to a final polymerization unit and polymerized in the form of a molten thin film having a thickness of from 0.005 to 0.15 mm.
摘要:
Disclosed herein are thermoplastic resin compositions. They contain, a principal components, (A) a methacrylimide-containing polymer containing at least 10% by weight of methacrylimide units represented by the following formula (1): ##STR1## wherein R represents a hydrogen atom or an aliphatic, aromatic or alicyclic hydrocarbon group having 1-20 carbon atoms, and (B) at least one polymer selected from the group consisting of (B-1) chlorinated polyolefins and (B-2) thermoplastic polyurethanes.
摘要:
A methacrylimide-containing polymer comprising a polymer (A) comprised of 5-100 weight % of units represented by the formula (I): ##STR1## wherein R is H or a C1-20 hydrocarbon group, and 0-95 weight % of units derived from an ethylenic monomer, wherein a polymer derived from at least one ethylenic monomer has been grafted onto the polymer (A). The methacrylimide-containing polymer is used as a blend with another thermoplastic polymer.
摘要:
A methacrylimide-containing polymer comprising a polymer (A) comprised of 5-100 weight % of units represented by the formula (I): ##STR1## wherein R is H or C1-20 hydrocarbon group, and 0-95 weight % of units derived from an ethylenic monomer, wherein a polymer derived from at least one ethylenic monomer has been grafted onto the polymer (A). The methacrylimide-containing polymer is used as a blend with another thermoplastic polymer.
摘要:
Disclosed is a thermoplastic resin composition consisting essentially of(1) 1 to 97 parts by weight of a methacrylimide-containing thermoplastic polymer (A) containing at least 10% by weight of methacrylimide units of the general formula ##STR1## where R is a hydrogen atom or an aliphatic, aromatic or alicyclic hydrocarbon groups of 1 to 20 carbon atoms, the methacrylimide-containing polymer (A) including acid groups and acid anhydride group in an amount of not less than 0.41 milliequivalent per gram of the thermoplastic polymer;(2) 1 to 97 parts by weight of a thermoplastic polyester (B); and(3) 2 to 98 parts by weight of a polycarbonate resin (C); the combined amount of components (A) to (C) being 100 parts by weight.
摘要:
A thermoplastic methacrylimide-containing polymer comprising 2 to 100% by weight of structural units represented by the following formula (I): ##STR1## wherein R is hydrogen or a hydrocarbon group having 1 to 20 carbon atoms, and 0 to 98% by weight of structural units derived from an ethylenically unsaturated monomer, wherein the content of iron in the polymer is not larger than 20 ppm and the difference between the maximum value and minimum value of the degree of imidization is preferably not larger than 5% by weight. This methacrylimide-containing polymer is used alone or as a blend thereof with another thermoplastic polymer.
摘要:
Disclosed is a thermoplastic resin composition having excellent moldability and thermal resistance which comprises(A) a methacrylimide-containing polymer having at least 10% by weight of units represented by the general formula ##STR1## where R is a hydrogen atom or an aliphatic, aromatic or alicyclic hydrocarbon radical having 1 to 20 carbon atoms,(B) at least one thermoplastic polymer selected from the group consisting of a thermoplastic polyester (B-1) and a thermoplastic polyamide (B-2), and(C) at least one multifunctional compound selected from the group consisting of a multifunctional epoxy compound, a multifunctional oxazoline compound and a multifunctional isocyanate compound.
摘要:
Disclosed is a resin composition comprised of (A) 100 parts by weight of a polymer containing at least 10% by weight of methacrylimide units and (B) 0.5 to 20 parts by weight of a specific polyhydric alcohol compound and/or a specific compound having polyoxyethylene segments. This resin composition provides a shaped article having a good antistatic property and heat resistance.
摘要:
A methacrylimide group-containing polymer containing repeating units represented by the following general formulas, respectively. ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are preferably methyl, butyl and methyl ester group, respectively.