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US 2020/0048507 A1Published application
All-Weather Pressure-Sensitive Adhesive
AssigneeGCP Applied Technologies Inc.
InventorsMD Nasim Hyder, Robert A. Wiercinski, Anandakumar Ranganathan, Jyoti Seth
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Abstract
The present invention provides a non-cured-in-place waterproofing pressure-sensitive adhesive having a microfibrillar additive for achieving ideal balance between sag resistance at elevated temperatures and good adhesion at low temperatures. Waterproofing membranes comprising a carrier sheet and pressure-sensitive adhesive layer are also described, along with methods of manufacture.
Claims19
A composition for a pressure-sensitive adhesive, comprising:
- at least one elastomer;
- at least one tackifier or bitumen;
- at least one plasticizer;
- and
- a microfibrillar rheology-modifying agent,
- wherein the composition is non-cured-in-place and is substantially devoid of structural diluents, radical addition diluents, curatives, cross-linkers, and liquid reactive oligomers.
3 more elements
A waterproofing membrane, comprising:
- a carrier sheet and a non-cured-in-place pressure-sensitive adhesive layer, wherein the pressure-sensitive adhesive layer has (i) a sag resistance of about 0.1 cm/hr or less at 240° F. and (ii) a peel strength of about 1.5 pli or more at 40° F.,
- wherein the pressure-sensitive adhesive layer comprises:
- at least one elastomer,
- at least one tackifier or bitumen,
- at least one plasticizer, and
- a microfibrillar rheology-modifying agent comprising a para-aramid pulp in an amount of about 0.1% to about 3.0% by total weight of the pressure-sensitive adhesive layer, wherein the para-aramid pulp has a fiber length of about 0.5 mm to about 2.0 mm and has a surface area of about 3 m2 per gram to about 12 m2 per gram,
- wherein the pressure-sensitive adhesive layer is non-cured-in-place and is substantially devoid of structural diluents, radical addition diluents, curatives, cross-linkers, and liquid reactive oligomers.
4 more elements
Dependencies are inferred from the claim text.