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AssigneeKureha Kagawa Kogyo Kabushiki Kaisha
InventorsZenya Shiiki, Takayuki Katto, Yo Iizuka, Takao Iwasaki, Toshitaka Kouyama
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A para-phenylene sulfide block copolymer consisting essentially of a recurring unit (A) ##STR1## and a recurring unit (B) ##STR2## said recurring units (A) being present in the form of a block of 20 to 5,000 units of (A) on the average in the molecular chain, the mol fraction of the recurring units (A) being in the range of 0.50 to 0.98, the block copolymer having a melt viscosity (.eta.*) of 50 to 100,000 poise as determined at 310.degree. C. at a shear rate of 200 sec.sup.-1 and having: (a) a glass transition temperature (Tg) of 20.degree. to 80.degree. C., (b) a crystalline melting point (Tm) of 250.degree. to 285.degree. C., and (c) a crystallization index (Ci) of 15 to 45, this value being that of the heat-treated, but not stretch-oriented copolymer, which block copolymer is preferably produced by a process comprising a first step of heating an aprotic polar organic solvent containing a dihaloaromatic compound consisting essentially of a m-dihalobenzene and an alkali metal sulfide to form a reaction liquid (E) containing a m-phenylene sulfide polymer consisting essentially of recurring units (B) ##STR3## and a second step of adding a p-dihalobenzene to the reaction liquid (E) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of the recurring units (B) and recurring units (A) ##STR4##
A process for producing a p-phenylene sulfide/m-phenylene sulfide block copolymer which comprises a first step of heating an aprotic polar organic solvent containing a p-dihalobenzene and an alkali metal sulfide to form a reaction liquid mixture (C) containing a p-phenylene sulfide polymer of recurring units (A) ##STR41## and a second step of adding a dihaloaromatic compound consisting essentially of a m-dihalozene to the reaction liquid mixture (C) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of a block consisting essentially of recurring units (A) and a block consisting essentially of recurring units (B) ##STR42## the reaction in the first step being carried out until the degree of polymerization of the recurring units (A) has become 20 to 5,000 of (A) on the average;
A para-phenylene sulfide/metaphenylene sulfide block copolymer which is produced by a process which comprises a first step of heating an aprotic polar organic solvent containing a p-dihalobenzene and an alkali metal sulfide to form a reaction liquid mixture (C) containing a p-phenylene sulfide polymer of recurring units (A) ##STR43## and a second step of adding a dihaloaromatic compound consisting essentially of a m-dihalobenzene to the reaction liquid mixture (C) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to from a block copolymer consisting essentially of a block consisting essentially of recurring units (A) and a block consisting essentially of recurring units (B) ##STR44## the reaction in the first step being carried out until the degree of polymerization of the recurring units (A) has become 20 to 5,000 of (A) on the average;
A molded article produced from a p-phenylene sulfide/m-phenylene sulfide block copolymer which is produced by a process which comprises a first step of heating an aprotic polar organic solvent containing a p-dihalobenzene and an alkali metal sulfide to form a reaction liquid mixture (C) containing a p-phenylene sulfide polymer of recurring units (A) ##STR45## and a second step of adding a dihaloaromatic compound consisting essentially of a m-dihalozene to the reaction liquid mixture (C) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of a block consisting essentially of recurring units (A) and a block consisting essentially of recurring units (B) ##STR46## the reaction in the first step being carried out until the degree of polymerization of the recurring units (A) has become 20 to 5,000 of (A) on the average;
A process for producing a p-phenylene sulfide block/m-phenylene sulfide copolymer comprising a first step of heating an aprotic polar organic solvent containing a dihaloaromatic compound consisting essentially of a m-dihalobenzene and an alkali metal sulfide to form a reaction liquid mixture (E) containing a m-phenylene sulfide polymer consisting essentially of recurring units (B) ##STR47## and a second step of adding a p-dihalobenzene to the reaction liquid mixture (E) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of the recurring units (B) and recurring units (A) ##STR48## the reaction in the first step being carried out until the average degree of polymerization of at least 2 and in the range of ##EQU6## wherein X represents mol fraction of recurring units (A) in the resulting block copolymer which is in the range of 0.50 to 0.98 has been obtained;
A para-phenylene sulfide/meta-phenylene sulfide block copolymer which is produced by a process comprising a first step of heating an aprotic polar organic solvent containing a dihaloaromatic compound consisting essentially of a m-dihalobenzene and an alkali metal sulfide to form a reaction liquid mixture (E) containing a m-phenylene sulfide polymer consisting essentially of recurring units (B) ##STR49## and a second step of adding a p-dihalobenzene to the reaction liquid mixture (E) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of the recurring units (B) and recurring units (A) ##STR50## the reaction in the first step being carried out until the average degree of polymerization of at least 2 and in the range of ##EQU7## wherein X represents a mol fraction of the recurring units (A) in the resulting block copolymer which is in the range of 0.50 to 0.98 has been obtained;
A molded article produced from a p-phenylene sulfide m-pheylene sulfide block copolymer, which is produced by a process comprising a first step of heating an aprotic polar organic solvent containing a dihaloaromatic compound consisting essentially of a m-dihalobenzene and an alkali metal sulfide to form a reaction liquid mixture (E) containing a m-phenylene sulfide polymer consisting essentially of recurring units (B) ##STR51## and a second step of adding a p-dihalobenzene to the reaction liquid mixture (E) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of the recurring units (B) and recurring units (A) ##STR52## the reaction in the first step being carried out until the average degree of polymerization of at least 2 and in the range of ##EQU8## wherein X represents a mol fraction of the recurring units (A) in the resulting block copolymer which is in the range of 0.50 to 0.98 has been obtained;
A process comprising sealing electronic parts with a sealing composition comprising 100 parts by weight of a synthetic resin component and 20 to 300 parts by weight of an inorganic filler wherein the synthetic resin component comprises mainly a phenylene sulfide block copolymer consisting essentially of recurring units ##STR53## and recurring units ##STR54## in which the former recurring units form blocks, have an average degree of polymerization of 20 to 2,000 bonded in the molecular chain and have a mol fraction in the range of 0.50 to 0.98, said copolymer having a melt viscosity of 10 to 1,500 poise (310.degree. C., shear rate:
A process for sealing electronic parts with a sealing composition comprising 100 parts by weight of a synthetic resin component and 20 to 300 parts by weight of an inorganic filler, wherein the synthetic resin is a block copolymer produced by a process comprising a first step of heating an aprotic polar organic solvent containing a dihaloaromatic compound consisting essentially of a m-dihalobenzene and an alkali metal sulfide to form a reaction liquid (E) containing a m-phenylene sulfide polymer consisting essentially of recurring units (B) ##STR55## and a second step of adding a p-dihalobenzene to the reaction liquid (E) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of the recurring units (B) and recurring units (A) ##STR56## the reaction in the first step being carried out until the average degree of polymerization of at least 2 and in the range of ##EQU9## wherein X represents a mol fraction of the recurring units (A) in the resulting block copolymer which is in the range of 0.50 to 0.98 has been obtained;
A process for sealing electronic parts with a sealing composition comprising 100 parts by weight of a synthetic resin component and 20 to 300 parts by weight of an inorganic filler, wherein the synthetic resin is a block copolymer produced by a process which comprises a first step of heating an aprotic polar organic solvent containing a p-dihalobenzene and an alkali metal sulfide to form a reaction liquid (C) containing a p-phenylene sulfide polymer of recurring units (A) ##STR57## and a second step of adding a dihaloaromatic compound consisting essentially of a m-dihalobenzene to the reaction liquid (C) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of a block consisting essentially of recurring units (A) and a block consisting essentially of recurring units (B) ##STR58## the reaction in the first step being carried out until the degree of polymerization of the recurring units (A) has become 20 to 2,000 of (A) on the average;
A composition for sealing electronic parts comprising 100 parts by weight of a synthetic resin component mainly comprising a phenylene sulfide block copolymer and 20 to 300 parts by weight of an inorganic filler, said block copolymer being produced by a process comprising a first step of heating an aprotic polar organic solvent containing a p-dihalobenzene and an alkali metal sulfide to form a reaction liquid (C) containing a p-phenylene sulfide polymer of recurring units (A) ##STR59## and a second step of adding a dihaloaromatic compound consisting essentially of a m-dihalobenzene to the reaction liquid (C) and heating the mxiture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of a block consisting essentially of recurring units (A) and a block consisting essentially of recurring units (B) ##STR60## the reaction in the first step being carried out until the degree of polymerization of the recurring units (A) has become 20 to 2000 of (A) on the average;
A composition for sealing electronic parts comprising 100 parts by weight of a synthetic resin component mainly comprising a phenylene sulfide block copolymer and 20 to 300 parts by weight of an inorganic filler, said block copolymer being produced by a process comprising a first step of heating an aprotic polar organic solvent containing a dihaloaromatic compound consisting essentially of a m-dihalobenzene and an alkali metal sulfide to form a reaction liquid (e) containing a m-phenylene sulfide polymer consisting essentially of recurring units (B) ##STR61## and a second step of adding a p-dihalobenzene to the reaction liquid (E) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of the recurring units (B) and recurring units (A) ##STR62## the reaction in the first step being carrired out until the average degree of polymerization of at least 2 and in the range of ##EQU10## wherein X represents a mol fraction of the recurring units (A) in the resulting block copolymer which is in the range of 0.50 to 0.98 has been obtained;
A process comprising modling a p-phenylene sulfide/m-phenylene sulfide block copolymer into an article, said block copolymer being produced by a process which comprises a first step of heating an aprotic polar organic solvent containing a p-dihalobenzene and an alkali metal sulfide to form a reaction liquid mixture (C) containing a p-phenylene sulfide polymer of recurring units (A) ##STR63## and a second step of adding a dihaloaromatic compound consisting essentially of a m-dihalobenzene to the reaction liquid mixture (C) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of a block consisting essentially of recurring units (A) and a block consisting essentially of recurring units (B) ##STR64## the reaction in the first step being carried out until the degree of polymerization of the recurring units (A) has become 20 to 5,000 of (A) on the average;
A process comprising molding a p-phenylene sulfide/m-phenylene sulfide block copolymer into an article, said block copolymer being produced by a process which comprises a first step of heating an aprotic polar organic solvent containing a dihaloaromatic compound consisting essentially of a m-dihalobenzene and an alkali metal sulfide to form a reaction liquid mixture (E) containing a m-phenylene sulfide polymer consisting essentially of recurring units (B) ##STR65## and a second step of adding a p-dihalobenzene to the reaction liquid mixture (E) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of the recurring units (B) and recurring units (A) ##STR66## the reaction in the first step being carried out until the average degree of polymerization of at least 2 and in the range of ##EQU11## wherein X represents a mol fraction of the recurring units (A) in the resulting block copolymer which is in the range of 0.50 to 0.98 has been obtained;
Dependencies are inferred from the claim text.