Process for preparing ethylene copolymer plasticized PVC

Details Process for preparing ethylene copolymer plasticized PVC Process for preparing ethylene copolymer plasticized PVC

1994-10-31

1995-11-07

Hamilton, III, Thomas

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525190, 525194, 525222, 525239, C08G 6702, C08L 2706, C08L 3304

Patent

active

054649030

ABSTRACT:
Gel, or unfluxed PVC grains commonly present in PVC plasticized with high molecular weight ethylene copolymer plasticizers, can be reduced by using an improved production process which involves substituting a modifier, which is partially crosslinked high molecular weight ethylene copolymer, for a portion of the non-crosslinked high molecular weight ethylene copolymer plasticizer. Preferably the modifier also contains a small mount of a low molecular weight plasticizer to counteract the effect of viscosity increase which the partially crosslinked ethylene copolymer otherwise would produce.

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G. H. Hoffman et al., Plasticization of PVC with Polyethylene Copolymer Resins, Journal of Vinyl Technology, vol. 16, pp. 16, 17, Mar. 1994.

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