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US 4,339,366 AGranted
Process for the production of polyester resins
OwnerDavid H. Blountinventor
Life of this patent
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Abstract
Polyester resins are produced by chemically reacting a broken-down alkali metal lignin-cellulose polymer, a substituted organic hydroxy compound and a polycarboxylic acid compound and/or a polycarboxylic acid anhydride. Polyester resins may be used as molding powder, as coating agents and to produce polyurethane foams.
Claims17
The process for the production of polyester resinous products by mixing, heating and reacting the following components:
- (a) a broken-down alkali metal lignin-cellulose polymer and/or a broken-down cellulose polymer produced by mixing 3 parts by weight of a cellulose-containing plant or plant derivative with 2 to 5 parts by weight of melted alkali metal hydroxide, then heating the mixture at 150.degree. C. to 220.degree. C. while agitating for 5 to 60 minutes;
- in an amount of 10 to 50 parts by weight;
- (b) a substituted organic hydroxy compound, which contains at least one substituent which will split off in the reaction, in an amount of 10 to 50 parts by weight;
- (c) polycarboxylic acid or polycarboxylic acid anhydride, or mixtures thereof, in an amount of 10 to 50 parts by weight.
1 more element
Dependencies are inferred from the claim text.