초록 ▼

There is disclosed a parting agent comprising the reaction product of an isocyanate compound and an isocyanate-reactive compound of the general structureR-(ao)n-Ywherein: R is a hydrophobic group containing alkyl, alkaryl, polyaryl, or siloxane moieties; (ao) is an alkylene oxide or mixture of alkyl

There is disclosed a parting agent comprising the reaction product of an isocyanate compound and an isocyanate-reactive compound of the general structureR-(ao)n-Ywherein: R is a hydrophobic group containing alkyl, alkaryl, polyaryl, or siloxane moieties; (ao) is an alkylene oxide or mixture of alkylene oxides such as ethylene oxide, propylene oxide, butylene oxide, and mixtures thereof; n is about 1 to about 25; and Y represents a monofunctional isocyanate-reactive group. There is also disclosed the processes that may be utilized to produce the parting agent.

대표청구항 ▼

1. A process for producing a parting agent, comprising the steps of:a) providing an isocyanate compound and an isocyanate-reactive compound of the general structure R(ao)nY in stoichiometrically equivalent amounts; wherein R is a hydrophobic group containing alkyl, alkaryl, polyaryl, or siloxane mo

1. A process for producing a parting agent, comprising the steps of:a) providing an isocyanate compound and an isocyanate-reactive compound of the general structure R(ao)nY in stoichiometrically equivalent amounts; wherein R is a hydrophobic group containing alkyl, alkaryl, polyaryl, or siloxane moieties and wherein the alkyl moieties comprise straight chain or branched hydrocarbons with 6 or more carbon atoms, the alkaryl moieties comprise monoalkyl, dialkyl, or trialkyl substituted aromatic hydrocarbons with 9 or more carbon atoms, the polyaryl moieties comprise a polyphenyl structure that is either alkyl substituted or unsubstituted, and the siloxane moieties comprise a trisiloxane or higher polysiloxane; (ao) is an alkylene oxide or mixture of alkylene oxides selected from the group consisting of ethylene oxide, propylene oxide, butylene oxide, and mixtures thereof; n is from about 1 to about 25; and Y represents a monofunctional isocyanate-reactive group b) reacting the isocyanate compound and the isocyanate reactive-compound at a first temperature until the isocyanate number is at an intermediate level; c) thereafter, adding a second charge of an isocyanate compound; and d) reacting the second charge of isocyanate compound and the isocyanate reactive-compound at a second temperature higher than the first temperature for a time sufficient to react substantially all of the isocyanate groups.