Hot melt adhesive composition
AssigneeE. I. Du Pont de Nemours and Company
InventorsRichard J. Boyce, Terence A. Cooper
Life of this patent
Estimating the term…
Abstract
Hot melt adhesive and sealant compositions based on alkali metal ionomers of random copolymers of ethylene, methyl acrylate, and one or more carboxylated monomers have improved high temperature viscosity stability when the composition contains 0.05-10 phr of ammonium polyphosphate.
Claims9
Masterbatch compositions suitable for preparing adhesive and sealant compositions, said masterbatch compositions consisting essentially of an alkali metal ionomer of a random copolymer of ethylene, methyl acrylate, and at least one carboxylated termonomer of the general formula ##STR2## where X is H or COOR or COOH, where Y is H or Me, and
- where R is alkyl of 1-6 carbon atoms, an inorganic filler, and 0.05-10 phr of an ammonium polyphosphate having the general formula
- H.sub.(n-m)+2 (NH.sub.4).sub.m P.sub.n O.sub.3n+1
- wherein n is an integer having a number average value greater than 10, m/n has an average value between about 0.7 and about 1.1, and m has a maximum value equal to n+2.
Adhesive and sealant compositions comprising an alkali metal ionomer of a random copolymer of ethylene, methyl acrylate, and at least one carboxylated termonomer of the general formula ##STR3## where X is H or COOR or COOH, Y is H or Me, and
- R is alkyl of 1-6 carbon atoms, an inorganic filler, 0.05-10 phr of an ammonium polyphosphate having the general formula
- H.sub.(n-m)+2 (NH.sub.4).sub.m P.sub.n O.sub.3n+1
- wherein n is an integer having a number average value greater than 10, m/n has an average value between about 0.7 and about 1.1, and m has a maximum value equal to n+2, a tackifier and a plasticizer.
A process for stabilizing the viscosity of an adhesive and sealant composition based on an alkali metal ionomer of a random copolymer of ethylene, methyl acrylate, and at least one carboxylated unsaturated monomer of the general formula ##STR4## where X is H or COOR or COOH, where Y is H or Me, and
- where R is alkyl of 1-6 carbon atoms, said process comprising adding to and blending with said composition 0.05-10 phr of an ammonium polyphosphate having the general formula
- H.sub.(n-m)+2 (NH.sub.4).sub.m P.sub.n O.sub.3n+1
- wherein n is an integer having a number average value greater than 10, m/n has an average value between about 0.7 and about 1.1, and m has a maximum value equal to n+2.
Dependencies are inferred from the claim text.