HOT MELT ADHESIVE BASED ON LOW MELTING POINT POLYPROPYLENE HOMOPOLYMERS AND METHODS FOR MAKING AND USING THE ADHESIVE  

Inventor(s): HAMANN RICHARD [US]; RACHOW LIANNE [US]

Priority number(s): US201615134517 20160421 ; US201414284381 20140521 ; US201361855775P 20130523

Abstract of  US2016230055 (A1)：

A hot melt adhesive for use on porous substrates, wherein the hot melt adhesive has about 10% to about 70% by weight of a polypropylene homopolymer having a DSC melting point of less than 100° C.; about 10% to about 60% of a first tackifying resin having a Ring & Ball Softening Point of about 95° C. to about 140° C.; about 0% to about 65% of a second tackifying resin that is different than the first tackifying resin; about 5% to about 50% of a plasticizer; about 1% to about 40% by weight of a secondary polymer which is either a semi crystalline polymer or wax with an enthalpy of fusion of greater than 30 Joules/gram; about 0.1% to about 5% of a stabilizer or antioxidant; wherein the components total 100% by weight of the composition, and the viscosity of the composition is equal to or less than about 20,000 centipoise (cP) at 163° C. (325° F.).