Preparation and application of chain-extending concentrates...

Details Preparation and application of chain-extending concentrates... Preparation and application of chain-extending concentrates...

C - Chemistry, Metallurgy

08

L

C08L 67/02 (2006.01) C08J 3/22 (2006.01) C08J 9/00 (2006.01) C08K 5/1539 (2006.01) C08L 23/08 (2006.01)

Patent

CA 2701383

The composition and the preparation of a chain-extending concentrate for production of foamed cellular materials of aromatic polyesters is disclosed in this invention. The chain--extending concentrate is comprised of an ethylene-acrylate copolymer, a high-temperature thermoplastic and a multifunctional compound. The preparation process consists of two steps: 1) Mixing and melt blending the multifunctional compound and the HT thermoplastic resin into the matrix of the ethylene-acrylate copolymer in an internal mixer and 2) extrusion of the mixture at a temperature below the melting point or reaction temperature of the multifunctional compound.

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