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US 5,346,959 AGranted
Functionalized ethylene oxide antistatic agents for ABS/SMA blends
AssigneeMonsanto Company
InventorsGoman (Gomez) Peter M., Kishore Udipi, Lionel R. Stebbins
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Abstract
An antistatic agent for thermoplastic polymers is provided wherein the antistatic agent is comprised of a functionalized alkylene oxide polymer and optionally a minor amount of an alkali or alkaline earth metal salt capable of complexing with the functionalized alkylene oxide polymer and wherein the thermoplastic polymers include styrenic polymers such as ABS; blends of an ABS copolymer and a styrene-maleic anhydride copolymer; or nylon 6.
Claims13
An antistatic thermoplastic composition comprising:
- a. from 93 to 80% by weight of a styrenic polymer blend which comprises acrylonitrile-butadiene-styrene copolymers and styrene-maleic anhydride copolymers;
- and
- b. from 7 to 20% by weight of an antistatic agent which comprises a functionalized ethylene oxide polymer wherein the ethylene oxide polymer is selected from the group consisting of ethylene oxide homopolymers and blocked ethylene oxide copolymers having propylene oxide end blocks, wherein at least one internal block of the copolymer comprises ethylene oxide repeating units or ethylene oxide propylene oxide random repeating units, and wherein the functional group of the functionalized ethylene oxide polymer is selected from the group consisting of hydroxy, epoxy and amino groups;
- and a minor amount of an alkali metal salt capable of complexing with the functionalized ethylene oxide polymer;
- wherein the sum of components (a) and (b) total 100% by weight and wherein the mole ratio of anhydride groups of the styrene-maleic anhydride copolymer to functional groups of the functionalized ethylene oxide polymer is in the range of about 5:1 to about 12:1.
2 more elements
Dependencies are inferred from the claim text.