US 12,084,540 B2
Modified arylhydroxy compounds for the production of polyurethane or polyisocyanurate
Stephan Schröter, Essen (DE); Athina Kerkaidou, Iserlohn (DE); Ganapathy Viswanathan, Louisville, KY (US); and Luca Basilissi, Pregnana Milanese (IT)
Assigned to BAKELITE GMBH, (DE)
Filed by BAKELITE GMBH, Iserlohn-Letmathe (DE)
Filed on Oct. 29, 2021, as Appl. No. 17/513,960.
Claims priority of application No. 20205059 (EP), filed on Oct. 30, 2020.
Prior Publication US 2022/0135731 A1, May 5, 2022
Int. Cl. C08G 18/54 (2006.01); C08G 8/32 (2006.01); C08J 9/14 (2006.01); C09D 175/04 (2006.01); C09J 175/04 (2006.01)
CPC C08G 18/546 (2013.01) [C08G 8/32 (2013.01); C08J 9/141 (2013.01); C09D 175/04 (2013.01); C09J 175/04 (2013.01); C08G 2150/00 (2013.01); C08G 2170/00 (2013.01); C08J 2375/04 (2013.01)] 16 Claims
 
1. A process for producing an esterified-alkoxylated-arylhydroxy-aldehyde-resin, comprising:
producing an arylhydroxy-aldehyde resin by reacting a reaction mixture of at least one arylhydroxy compound and at least one aldehyde in a molar ratio of from 1:0.25 to 1:0.85 in the presence of an acid, under reflux conditions having a temperature of 100° C. or more;
removing any free acid, water and residual monomer to a desired level;
charging a base catalyst to the reaction mixture at temperatures between 100° C. to 200° C.;
charging an alkoxylating agent to the reaction mixture wherein a ratio of phenolic hydroxyl groups to alkoxylating agent is 1:0.1 to 1:30 at temperatures of 100° C. to 200° C.;
neutralizing the cooled reaction mixture with inorganic or organic acid;
reacting the neutralized reaction mixture with a monocarboxylic or dicarboxylic acid or their anhydrides or carboxylic acid halides and holding the reaction at around 80° C. to 200° C. until the esterification reaction is complete; and
discharging the esterified-alkoxylated-arylhydroxy-aldehyde-resin.