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US 12,674,046 B2Granted
Adhesive formulations based on ethylene multi-block interpolymers and functionalized propylene-based polymers
AssigneeDow Global Technologies LLC
InventorsWanfu Ma, Allan Walter Mclennaghan, Jozef Van Dun, Yanzhen Huang
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Abstract
A hot melt adhesive (HMA) composition comprises: a) an ethylene/alpha-olefin multi-block interpolymer that has a melt viscosity (177° C.)≤50,000 mPa·s; b) an anhydride and/or carboxylic acid functionalized propylene-based polymer that has a melt viscosity (190° C.)≤50,000 mPa·s; c) a tackifier; and d) a wax. Such composition delivers both a high temperature heat resistance and a fast set time.
Claims20
A composition comprising the following components:
- a) an ethylene/alpha-olefin multi-block interpolymer that has a melt viscosity (177° C.)≤50,000 mPa·s;
- b) an anhydride and/or carboxylic acid functionalized propylene-based polymer that has a melt viscosity (190° C.)≤50,000 mPa·s and wherein the anhydride and/or carboxylic acid functional propylene-based polymer (component b) has a melt viscosity (190° C.)≥12,000 mPa·s;
- c) a tackifier;
- and
- d) a wax;
- wherein the composition comprises from 30.0 wt % to 50.0 wt % of the sum of component a and component b, based on the weight of the composition;
- and
- wherein the composition has Fiber Tear (at 70° C.)≥90%.
5 more elements
Dependencies are inferred from the claim text.