Patent · US Expired

Tack-free polymer pellets

US4510281A · kind A · utility

12Cited by

4References

14Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventor

Malcolm S. Smith · Beaumont, US

Key dates

Filing date	Dec 19, 1983
Grant date	Apr 9, 1985
Priority date	—
Expiry date	Dec 19, 2003

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08K5/20
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Certain N,N'-ethylenebisamides and N,N'-diadipamides added to ethylene/vinyl acetate dipolymers, terpolymers of ethylene with carbon monoxide, copolymers of ethylene with methacrylic acid, copolymers of ethylene with methyl methacrylate, and terpolymers of ethylene with n-butyl acrylate and carbon monoxide remarkably reduce the tendency of polymer pellets to block. Free-flowing copolymer pellets can be handled without blocking and moved more quickly through the packing equipment and can be stored for extended periods without blocking. Copolymer pellets containing these additives can be packed into large containers and shipped without blocking. The preferred additive is N,N'-ethylenebisoleamide.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.