Composition based on phenolic resin, polyisocyanate, and petroleum oil
AssigneeMinnesota Mining and Manufacturing Company
InventorJoseph Graham
Life of this patent
Estimating the term…
Abstract
Curable compositions comprising phenolic resin, polyisocyanate, catalyst, and petroleum oil. The phenolic resin is soluble in the petroleum oil, but during reaction of the ingredients the petroleum oil separates as a uniform dispersion of minute droplets entrapped within the reaction product. The compositions are insensitive to the presence of water and produce dimensionally stable cured products, making them especially useful as wood-patching compositions.
Claims29
A curable composition of matter comprising
- a. an oil-soluble phenolic resin;
- b. polyisocyanate carrying on the average at least two isocyanate groups per molecule capable of reacting with hydroxyl groups on said phenolic resin to form a cured reaction product;
- c. a catalyst that promotes reaction between said isocyanate and hydroxyl groups;
- and
- d. petroleum oil comprising a blend of aromatic and paraffinic oils and included in an amount sufficient to dissolve said phenolic resin, polyisocyanate, and catalyst to a flowable form;
- the petroleum oil separating from said reaction product during the course of reaction as a uniform dispersion of minute droplets entrapped within the reaction product.
A cured composition of matter prepared by reacting a mixture that comprises
- a. an oil-soluble phenolic resin;
- b. polyisocyanate carrying on the average at least two isocyanate groups per molecule capable of reacting with hydroxyl groups on said phenolic resin to form a cured reaction product;
- c. a catalyst that promotes reaction between said isocyanate and hydroxyl groups;
- and
- c. petroleum oil comprising a blend of aromatic and paraffinic oils and included in an amount sufficient to dissolve said phenolic resin, polyisocyanate, and catalyst to a flowable form;
- the petroleum oil being separated from said reaction product in the cured compsition as a uniform dispersion of minute droplets entrapped within the reaction product.
A curable composition of matter comprising
- a. an oil-soluble phenolic resin prepared from alkyl-substituted phenol;
- b. aromatic polyisocyanate carrying on the average at least two isocyanate groups per molecule capable of reacting with hydroxyl groups on said phenolic resin to form a cured reaction product;
- c. a catalyst that promotes reaction between said isocyanate and hydroxyl groups;
- and
- d. petroleum oil in an amount sufficient to dissolve said phenolic resin, polyisocyanate, and catalyst to a flowable form;
- said petroleum oil comprising a blend of aromatic and paraffinic oils, with the aromatic oils accounting for 50-80 weight-percent of the petroleum oil and the petroleum oil separating from said reaction product during the course of reaction to become dispersed a uniform dispersion of minute droplets entrapped within the reaction product.
Dependencies are inferred from the claim text.