Hot melt adhesive based on low melting point polypropylene homopolymers and methods for making and using the adhesive

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...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Hamann Richard, Rachow Lianne
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE ADHESIVES BANDAGES, DRESSINGS OR ABSORBENT PADS CHEMISTRY DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS DYES FILTERS IMPLANTABLE INTO BLOOD VESSELS FIRST-AID KITS FOMENTATION HUMAN NECESSITIES HYGIENE LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM MEDICAL OR VETERINARY SCIENCE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES PAINTS PERFORMING OPERATIONS POLISHES PROSTHESES TRANSPORTING TREATMENT OR PROTECTION OF EYES OR EARS USE OF MATERIALS AS ADHESIVES
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Beschreibung
Zusammenfassung:	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.).