摘要:
The present invention is a novel block copolymer containing a controlled distribution copolymer block of a conjugated diene and a mono alkenyl arene, where the controlled distribution copolymer block has terminal regions that are rich in conjugated diene units and a center region that is rich in mono alkenyl arene units. Also disclosed is a method for manufacture of the block copolymer.
摘要:
Lithium-terminated polymers of one or more conjugated dienes and of one or more mono alkenyl arenes are coupled by reaction with an alkoxy silane coupling agent having the formula Rx—Si—(OR′)y, where x is 0 or 1, x+y=4, R and R′ are the same or different, R is selected from aryl hydrocarbon radicals, linear alkyl hydrocarbon radicals and branched alkyl hydrocarbon radicals, and R′ is selected from linear and branched alkyl hydrocarbon radicals, such that the resulting polymer composition contains less than about ten weight percent of uncoupled polymer diblock. The polymer compositions are subsequently selectively hydrogenated, and are useful in a variety of compounds and end use applications.
摘要翻译:一个或多个共轭二烯和一个或多个单链烯基芳烃的锂封端的聚合物通过与具有式R x -Si-(OR') 其中x为0或1,x + y = 4,R和R'相同或不同,R选自芳基烃基,直链烷基烃基和支链烷基烃基,R' 选自直链和支链烷基烃基,使得所得聚合物组合物含有小于约10重量%的未偶联聚合物二嵌段。 聚合物组合物随后被选择性氢化,并且可用于各种化合物和最终用途。
摘要:
Living anionic polymers of unsaturated monomers are conveniently capped with oxetane or an alkyl substituted oxetane to provide terminal primary hydroxyl groups. The hydroxyl capped polymers are useful in making coatings, sealants, binders, and block copolymers with polyesters, polyamides, and polycarbonates.
摘要:
The present invention relates to novel compositions comprising (a) anionic block copolymers having at least two blocks of a mono alkenyl arene and at least one block of a conjugated diene and mono alkenyl arene having a specific arrangement of the monomers in the copolymer block, and (b) tailored softening modifiers have a particular structure that results in a surprising improvement in properties for the composition. Also included are processes for the manufacturing such novel compositions and various end-uses and applications for such compositions.
摘要:
Hydrogenated butadiene polymers having terminal functional groups have minimum viscosity at any molecular weight when the 1,2-addition is between 30% and 70%. Hydrogenated butadiene polymers having about two terminal hydroxyl groups per molecule have surprisingly lower viscosities at 30% to 70% 1,2-addition than similar polymers having either higher or lower amounts of 1,2-addition. The polymers are useful in making coatings, sealants, binders, and block copolymers with polyesters, polyamides, and polycarbonates.
摘要:
Blends of a sulfonated thermoplastic block polymer and a compatible extender oil are described. The block copolymer is first selectively hydrogenated and thereafter modified by grafting sulfonic acid containing functional groups primarily in the alkenyl arene blocks. Neutralization of the acid groups to a metal salt is preferred to prepare oil extended blends that retain substantial amounts of non-extended mechanical properties.
摘要:
Hydrogenated butadiene polymers having terminal functional groups have minimum viscosity at any molecular weight when the 1,2-addition is between 30% and 70% Hydrogenated butadiene polymers having about two terminal hydroxyl groups per molecule have surprisingly lower viscosities at 30% to 70% 1,2-addition than similar polymers having either higher or lower amounts of 1,2-addition. The polymers are useful in making coatings, sealants, binders, and block copolymers with polyesters, polyamides, and polycarbonates.
摘要:
The present invention concerns an improved process for producing an ionomer from an acid group containing polymer. Production of the ionomer requires neutralization of an acid functionality or reaction of anhydride functional groups with a metal ion source to produce a salt. It has been found that metal hydrocarbyls or metal hydrides can be used as the source of metal ions for neutralizing the acid or anhydride functionalities. The reaction can occur in a solvent or in a melt, but is most preferably performed in a solvent.
摘要:
A blend of a modified thermoplastic block polymer of a conjugated diene and an alkenyl arene with an extender resin compatible with the conjugated diene block is described herein. The block copolymer is first selectively hydrogenated and thereafter modified by grafting carboxyl functional groups primarily in the alkenyl arene blocks.
摘要:
A super-toughened multiphase thermoplastic composition is provided by incorporating with an .alpha.,.omega.-polyamide at least one functionalized, selectively hydrogenated alkenyl arene/conjugated diene non-network forming block copolymer to which has been grafted an effective amount of carboxyl functional groups primarily in the alkenyl arene blocks thereof.