摘要:
Impact modified polyamide/polyether block copolymers have increased impact strength for corresponding polyol concentration, which can be achieved using certain difunctional and tri-functional symmetrical triazine derivatives as the co-catalyst/coupling agent, and lactamyl salts as the catalyst. Also disclosed is an improved anionic polymerization process, especially suitable for reaction injection molding.The impact modified polyamide/polyether block copolymers have segments of formulae I and II and either III or IV or both III and IV: ##STR1##
摘要翻译:抗冲改性聚酰胺/聚醚嵌段共聚物对于相应的多元醇浓度具有增加的冲击强度,这可以使用某些二官能和三官能的对称三嗪衍生物作为助催化剂/偶联剂和内酰胺盐作催化剂来实现。 还公开了改进的阴离子聚合方法,特别适用于反应注射成型。 抗冲击改性的聚酰胺/聚醚嵌段共聚物具有式I和II以及III或IV或III和IV两者的区段:II III IV
摘要:
This invention relates to blends of nylon homopolymers and copolymers with poly(hydroxyamino ether) polymers. More particularly, there are provided blends of nylon 6 and its copolymers with poly(hydroxyamino ether) which form films having high miscibility, high clarity and good processability.
摘要:
Oxygen barrier polyamide compositions exhibiting high oxygen scavenging capability suitable for extended shelf-life, packaging applications. Thus a polyamide composition comprises a polyamide homopolymer, copolymer, or blends thereof, and at least one polyamide reactive, oxidizable polydiene or oxidizable polyether. The polyamide products are particularly suited to making barrier packaging articles such as monolayer or multi-layer films, sheets, thermoformed containers and coinjection/coextrusion blow molded bottles comprising PET, polyolefin or polycarbonate as structural layers. Such articles are useful in a variety of oxygen-sensitive food, beverage, pharmaceutical and health care product packaging applications.
摘要:
Oxygen scavenging barrier polyamide compositions exhibiting high oxygen scavenging capability as well as good coinjection stretch blow moldability characteristics suitable for making multilayer PET bottles with good clarity and delamination resistance are claimed in this invention. The polyamide compositions of this invention comprise a slow crystallizing polyamide blend comprising (i) an amorphous, semiaromatic polyamide homopolymer, copolymer or mixture thereof and (ii) a semicrystalline, aliphatic polyamide homopolymer, copolymer or mixture thereof wherein in the weight ratio of (i):(ii) ranges from about 99:1 to about 30:70; at least one polyamide-compatible, oxidizable polydiene; and at least one oxidation promoting metal salt catalyst. The multilayer PET bottles, made with the polyamide compositions of this invention as the barrier layer, are suitable for extended shelf-life packaging of oxygen-sensitive food and beverage products such as beer and juices.
摘要:
A miscible blend composition having high T.sub.g and good chemical resistance comprising, based on the total weight of the composition, from about 30 to about 90 weight % of a polyalkylene terephthalate, from about 70 to about 10 weight % of a polyarylate polymer, and an effective amount of an ester-interchange inhibitor.
摘要:
High molecular weight polyethylene terephthalate resins in which there is used a chain extending agent having the formula: ##STR1## wherein A is any hydrocarbon group having the necessary number of available valences to bound itself to all of the acyl groups of the compound, Y is at least 1 and x is an integer of from 6 to 12.Preferably, the chain extending agent is a bisacyllactam, such as terephthaloyl bislaurolactam.The chain extending agent can be used in combination with a carboxyl reactive compound.
摘要:
A thermotropic poly(ester carbonate) containing diacyl moieties such as terephthalate and carbonate moieties as well as dihydroxy-derived moieties is useful for forming fibers or films. The dihydroxy-derived moieties are at least 40% derived from t-butylhydroquinone, with hydroquinone and methylhydroquinone being exemplary second components. The polymers can be prepared by melt, solution or interfacial polymerization, are liquid crystalline in the melt and have glass transition temperatures above 100.degree. C.