Unsaturated polyester resins modified by substitution, with lactic acid, of an acid and alcohol component of the polyester

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United States of America Patent

PATENT NO 9212256
APP PUB NO 20130123421A1
SERIAL NO

13811319

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Abstract

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The invention relates to an unsaturated polyester resin comprising a) a lactic acid-modified unsaturated polyester and b) a copolymerizable comonomer, with replacement, with lactic acid, in the composition of an initial polyester, of:

    i) up to 90 mol % of phthalic anhydride of the acid component of the initial polyester, the acid component comprising from 80 to 20 mol % of maleic anhydride (MA) or fumaric acid, and from 20 to 80 mol % of phthalic anhydride (PA), the polyol component of the initial polyester comprising from 50 to 100 mol % of propylene glycol (PG) and from 0 to 50 mol % of a polyol among ethylene glycol (EG), diethylene glycol (DEG), dipropylene glycol (DPG) and/or 1,3-butylene glycol and/or 1,4-butanediol and/or neopentyl glycol (NPG),ii) up to 100% of a polyol from DPG and DEG, present in an initial overall molar amount ranging up to 50% of the polyol component of the initial polyester and also comprising PG, with the acid component of the initial polyester being maleic anhydride (MA) or fumaric acid, optionally in the presence of up to 20 mol % of the phthalic anhydride (PA) acid component, and in this case with the initial phthalic anhydride (PA) also being up to 100% replaced with lactic acidand with the molar ratio of lactic acid relative to the acid component, without including the lactic acid, of said polyester a) being at most 1.75.

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Patent OwnerAddress
POLYNT COMPOSITES FRANCE62320 DROCOURT

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cledat, Guillaume Lille, FR 4 1
Gadea, Ugarte Oscar Miranda de Ebro, ES 1 1
Mazajczyk, Jérome Biache Saint Vaast, FR 1 1
Royo, José Ignacio Logrono, ES 1 1

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