Patent ID: 11970635
Assignee: HENKEL AG & CO. KGAA
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  A  B | IPC A  B  C

Claim 0:
1. An article comprising:
a nonwoven substrate;
an elastic strand or an elastic film; and
a stretch adhesive composition consisting of:
(i) about 25 wt. % to about 65 wt. % of a single semi-crystalline propylene co-polymer characterized by
a heat of fusion (ΔHm) is between 20 J/g and 24 J/g;
a DSC melting temperature of 125° C. to 165° C., measured in accordance with ASTM 3418-12;
a storage modulus (E′) at 40° C. and 1 Hz of between about 3.0×108 dyn/cm2 and about 1.7×109 dyn/cm2; and
a viscosity (η) at 200° C. of between about 2 Pa·s and about 100 Pa·s,

(ii) about 1 wt. % to about 5 wt. % of an adhesion promoter that is a functionalized polyethylene, functionalized tackifier, functionalized plasticizer, or a mixture thereof;
(iii) about 10 wt. % to about 55 wt. % of a tackifier; and
(iv) optionally, up to 8 wt. % of a plasticizer; up to 2 wt % of an antioxidant, stabilizer, crosslinking agent, filler, colorant, rheology modifier, or a mixture thereof; and up to 10 wt % of a non-functionalized wax;

wherein the stretch adhesive composition exhibits creep resistance of about 35% or less for both an initial creep resistance and an aged creep resistance measured after about 28 days at about 40° C.; and
wherein the wt % is based on the weight of the stretch adhesive composition.