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US 12,084,540 B2Granted
Modified arylhydroxy compounds for the production of polyurethane or polyisocyanurate
AssigneeBakelite AG
InventorsStephan Schröter, Athina Kerkaidou, Ganapathy Viswanathan, Luca Basilissi
Life of this patent
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Abstract
Esterified arylhydroxy compounds for the production of polyurethane or polyisocyanurate. In order to provide aromatic polyols for the production of polyurethanes or polyisocyanurates which are process-technically suitable in terms of their viscosity and at the same time give the end product good physical properties and a good reaction to fire, esterified arylhydroxy compounds are proposed as polyols.
Claims16
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.
5 more elements
A process for producing an esterified-alkoxylated-arylhydroxy-aldehyde-resin, comprising:
- reacting 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;
- removing any free acid, water and residual monomer to provide a first reaction product;
- reacting the first reaction product with a base catalyst to provide a second reaction product;
- adding at least one alkoxylating agent to the second reaction product to provide a third reaction product, wherein a ratio of phenolic hydroxyl groups to alkoxylating agent in the third reaction product is 1:0.1 to 1:30;
- adding at least one inorganic or organic acid to neutralize the third reaction product;
- and
- reacting the neutralized reaction product with a monocarboxylic or dicarboxylic acid or their anhydrides and/or one or more carboxylic acid halides to provide an esterified-alkoxylated-arylhydroxy-aldehyde-resin having a hydroxyl functionality of from 1 to 10.
4 more elements
Dependencies are inferred from the claim text.