Hydrolysis of polysuccinimide to produce low-color polyaspartic

Details Hydrolysis of polysuccinimide to produce low-color polyaspartic Hydrolysis of polysuccinimide to produce low-color polyaspartic

1995-01-03

1996-05-28

Carrillo, Ana L.

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

Synthetic resins

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

525421, C08G 6900, C08G 6910

Patent

active

055212573

ABSTRACT:
Low-color polyaspartate homopolymers, copolymers or homopolymer/copolymer mixtures and the metal salts thereof, are produced by the oxidative, hydrolysis of polysuccinimide homopolymers, copolymers or homopolymer/copolymer mixtures, and metal salts thereof, in the presence of selected chlorine-free, non-chromogenic oxygen containing oxidizing agents. The preferred oxidizing agents are selected from the group consisting of hydrogen peroxide, sodium percarbonate, potassium percarbonate, sodium perborate tetrahydrate, sodium perborate monohydrate, sodium periodate, potassium periodate and peroxycarboxylic acids. The advantage of the claimed process is that low-color polyaspartates can be produced without the addition of further processing steps beyond the hydrolysis of the polysuccinimide presursor. Solid, low-color polyaspartates are obtained by evaporating to dryness the polyaspartate solutions obtained after oxidative hydrolysis.

REFERENCES:
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patent: 5152902 (1992-10-01), Koskan et al.
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patent: 5292864 (1994-03-01), Wood et al.
patent: 5373086 (1994-12-01), Koskan et al.
patent: 5373088 (1994-12-01), Koskan et al.
patent: 5408029 (1995-04-01), Wood et al.

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