摘要:
The method of preparing a thermoplastic polyarylether polymer which comprises reacting a first monomer composition comprising an activated dihalobenzenoid compound and a dihydroxydiphenyl aliphatic monomer in a molar ratio of dihalobenzenoid compound to dihydroxybenzenoid compound of at least 1.2 to 1, adding to the product a second monomer composition comprising a dihydroxybenzenoid compound comprising at least one compound which is free of aliphatic moieties and polymerizing.
摘要:
The method of preparing a thermoplastic polyarylether polymer which comprises reacting a first monomer composition comprising an activated dihalobenzenoid compound and dihydroxybenzenoid composition comprising hydroquinone, adding to the product a second monomer composition comprising a dihydroxybenzenoid composition consisting essentially of Bis-(hydroxyphenyl) compounds in a concentration of at least 50 mole percent of the total Bis-(hydroxyphenyl) compounds added in the monomer compositions and polymerizing.
摘要:
Described herein are poly(aryl ether ketones) derived from biphenol which can be improved by incorporating bisphenol comonomers. The resulting polymers have lower melting points while the Tg is essentially unchanged resulting in good mechanical and crystallization properties.
摘要:
Described herein are crystalline block polymers and chain extended polymers containing blocks of crystalline poly(aryl ether ketones). Also, described herein are monomers and oligomers suitable for preparing the crystalline block polymers and chain-extended polymers. Further, described herein are methods for producing the crystalline block and chain-extended polymers, as well as the monomers and oligomers.
摘要:
Described herein are poly(aryl ether ketones) derived from biphenol which can be improved by incorporating bisphenol comonomers. The resulting polymers have lower melting points while the Tg is essentially unchanged resulting in good mechanical and crystallization properties.
摘要:
Described herein are crystalline block polymers and chain extended polymers containing blocks of crystalline poly(aryl ether ketones). Also, described herein are monomers and oligomers suitable for preparing the crystalline block polymers and chain-extended polymers. Further, described herein are methods for producing the crystalline block and chain-extended polymers, as well as the monomers and oligomers.
摘要:
A phenolic allyl ether is provided which can be prepared by reacting a polyphenol with an allyl halide, said polyphenol described by the formula ##STR1## in which Ar is an aromatic moiety, L is a divalent cyclohexanenorbomane linking moiety, L' is a divalent cycloaliphatic moiety, Allyl is a phenolic allyl ether group, and each of m and n is a number within the range of 0 to about 10. Such phenolic allyl ethers include the reaction product of allyl halide with the product of the addition reaction of a phenol and a cyclohexenenorbornene compound such as 5-(3-cyelohexen-1-yl)bicyclo[2.2.1]hept-2-ene. The resulting phenolic allyl ether resins are useful as processing agents for polymaleimides.
摘要:
A phenolic compound is provided which can be described by the formula ##STR1## in which Ar is a C.sub.6-20 aromatic moiety, L is a cyclohexanenorbornane linking moiety, L' is a divalent cycloaliphatic moiety, and each of m and n is a number within the range of 0 to about 10. Such phenols include the product of the addition reaction of phenol with a cyclohexenenorbornene compound such as 5-(3-cyclohexen-1-yl)bicyclo[2.2.1 ]hept-2-ene.
摘要:
An improved olefin metathesis catalyst system is disclosed. The catalyst system comprises a transition metal halide metathesis catalyst and an organo transition metal hydride co-catalyst of the formulaL.sub.x --M--Hwherein M is a group IVB transition metal including zirconium, titanium or hafnium; L is a ligand selected independently from the group of hydrogen, halide and organic ligands such as an optionally substituted C.sub.1-20 alkyl or alkenyl, an optionally substituted C.sub.3-20 cycloalkyl or cycloalkenyl having 3 to 6 carbon atoms in the ring, an optionally substituted C.sub.5-20 cycloakadienyl having 5 carbon atoms in the cycloalkadienyl ring, or an optionally substituted C.sub.6-20 aryl or fused aryl, where at least one L is a cycloalkadienyl; and x is one less than the valence of M. The optional substitutions on the organic ligands include halogens, preferably chloride or flouride; C.sub.1-6 alkyl; C.sub.1-6 alkoxy; and C.sub.1-6 haloalkyl. The preferred ligand is a C.sub.5-20 cycloalkadienyl having 5 carbon atoms in the cycloalkadienyl group, e.g. cyclopentadienyl. The co-catalysts of this invention are combined with molybdenum or tungsten metathesis catalysts to provide an active catalytic system for the polymerization of cycloolefins, such as dicyclopentadiene.
摘要翻译:公开了改进的烯烃复分解催化剂体系。 催化剂体系包括过渡金属卤化物复分解催化剂和式Lx-M-H的有机过渡金属氢化物助催化剂,其中M是含有锆,钛或铪的IVB族过渡金属; L是独立地选自氢,卤化物和有机配体如任选取代的C 1-20烷基或烯基,任选取代的C 3-20环烷基或环中具有3至6个碳原子的环烯基的配体,任选取代的 在环二烯基环中具有5个碳原子的C 5-20环烷二烯基,或任选取代的C 6-20芳基或稠合芳基,其中至少一个L是环二烯基; 且x小于M的化合价。有机配体上的任选取代包括卤素,优选氯化物或氟化物; C 1-6烷基; C 1-6烷氧基 和C 1-6卤代烷基。 优选的配体是在环烷二烯基中具有5个碳原子的C 5-20环烷二烯基, 环戊二烯基。 本发明的助催化剂与钼或钨复分解催化剂组合以提供用于环烯烃如二环戊二烯聚合的活性催化体系。
摘要:
A catalyst and process for the polymerization of cyclic olefins, such as dicyclopentadiene, in the presence of an elastomer polymer, are disclosed. The catalyst includes a transition metal compound, a co-catalyst and a boron halide promoter. Polymerization can be carried out at fast reaction times in a reaction injection molding process to prepare a thermoset molded article having high Tg and superior toughness.