Aqueous dispersions of polyamides

申请公布号：

US5948880(A)

申请号：

US19970852967

申请日期：

1997.05.08

申请公布日期：

1999.09.07

申请人：

HENKEL CORPORATION

发明人：

FISCHER, STEPHEN A.;BOUDREAUX, CHASE J.;WIGGINS, MICHAEL S.

分类号：

C08J3/02;C08G69/34;C08J3/03;C08J3/07;C08K5/05;C08K5/42;C08K5/521;C08L75/04;C08L77/08;C08L79/08;C09D177/00;C09J177/00;C09J177/08;(IPC1-7):C08G69/34

主分类号：

C08J3/02

摘要：

A process is provided for preparing a dispersion of a polyamide in water, said process comprising: forming a solution of a polyamide having an acid value of greater than about 2 in an organic solvent to form a solution of said polyamide in said solvent, said polyamide and said solvent being at a temperature below the softening point of said polyamide during said dissolving, said solution further comprising a surfactant, wherein at least a portion of the acid value of said polyamide is neutralized, adding sufficient water to said solution with mixing to form an oil-in-water dispersion, the temperature of said solution and said water being below the softening point of said polyamide during said adding, and removing at least a major amount of said organic solvent from said oil-in-water dispersion. The resulting dispersion is useful in preparing a coating of the polyamide, which coating is useful as an adhesive.