Three stages process for the preparation of solid thermoplastic

Details Three stages process for the preparation of solid thermoplastic Three stages process for the preparation of solid thermoplastic

1998-02-18

2000-08-15

Seidleck, James J.

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

Synthetic resins

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

525 61, 525 56, 525 57, 524557, 264185, C08F 1606, C08L 2904

Patent

active

061038237

ABSTRACT:
A three stages process for the preparation of solid thermoplastic compositions based on polyvinyl alcohol comprising the mixing in a mixer of a first charge, comprising the polyvinyl alcohol and solid plasticizers, with a second charge constituted by one or more hydroxylated organic compounds selected from glycols, glycol ethers and alkanolamines and at least a salt of an alkaline and/or alkaline earth metal, and a third charge containing at least one or more solid polyhydroxylated alcohols, glycols and glycolic ethers, liquid alkanolamines, organic or inorganic mineral acids, hydrated inorganic salts, polymers having a low molecular weight, stabilizers and possible mineral charges, is described.

REFERENCES:
patent: 3997489 (1976-12-01), Coker
patent: 4323492 (1982-04-01), Zimmermann et al.
patent: 4469837 (1984-09-01), Cattaneo
European Search Report, The Hague, Jun. 12, 1998, Examiner: De Los Arcos, E.
Chemical Abstracts, vol. 100, No. 2, Jan. 9, 1984, abstract No. 7796.
Chemical Abstracts, vol. 121, No. 14, Oct. 3, 1994, abstract No. 158893.
Database WPI, Section CH, Week 7430, Jan. 11, 1974, Derwent Publications Ltd., London, GB; Class A14, AN 74-54354V.

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