Processes for producing aqueous alkyd resin dispersions

Details Processes for producing aqueous alkyd resin dispersions Processes for producing aqueous alkyd resin dispersions

2005-05-03

2005-05-03

Yoon, Tae H. (Department: 1714)

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

Synthetic resins

Process of treating scrap or waste product containing solid...

C521S048500, C523S501000, C524S600000, C524S845000

Reexamination Certificate

active

06887909

ABSTRACT:
The present invention provides production processes of aqueous alkyd resin dispersions, said processes comprising a step of synthesizing alkyd resin by dissolving polyester resin whose chief component is terephthalic acid and which has been recovered from waste materials and regenerated, in a mixture of an alcoholic component, fatty acid and/or oil and fat, and polybasic acid component, said alcoholic component containing tri- or lower polyhydric alcohol and tetra- or higher hydric alcohol at a weight ratio of the former/latter within a range of 0-20, to effect depolymerizaiton and concurrently, esterification reaction; if necessary a step of introducing acid radicals into the resin; and a step of neutralizing and/or dispersing with use of surfactant, the so obtained alkyd resin in water. According to the processes of the present invention, aqueous alkyd resin dispersions can be prepared within a short time, using polyester resin which has been recovered from waste materials and regenerated.

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CIPO—Canadian Patent Database—Claims of 2,087,914.

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