公开(公告)号：US12245922B2

公开(公告)日：2025-03-11

申请号：US16816399

申请日：2020-03-12

Applicant: Bostik, Inc.

Inventor： Kimberly E. Secrist ,  Neil G. Janetski

IPC: A61F13/42 ,  A61F13/84 ,  A61L15/34 ,  A61L15/56 ,  A61L15/58 ,  A61F13/511 ,  A61F13/514 ,  A61L26/00

Abstract: A hot melt wetness indicator comprising an adhesive base composition utilizing a halogen-free species, namely nitrazine yellow, to trigger color change in hygiene articles, such as disposable diapers, to serve as moisture or wetness indicator upon insult. In some embodiments of the invention, the wetness indicator turns from yellow to purple.

公开(公告)号：US20240148568A1

公开(公告)日：2024-05-09

申请号：US17773084

申请日：2020-10-28

Applicant: Bostik, Inc.

Inventor： Kimberly E. Secrist ,  Neil G. Janetski ,  Steven D. Gray

IPC: A61F13/534 ,  C09J123/14 ,  C09J123/22 ,  A61F13/15

CPC classification number: A61F13/534 ,  C09J123/14 ,  C09J123/22 ,  A61F2013/1591 ,  A61F2013/53445

Abstract: A tackifier-free, hot melt adhesive composition comprises an amorphous, single site-catalyzed, high molecular weight propylene copolymer, preferably with a weight average molecular weight (Mw) greater than 80,000 g/mol; a semicrystalline, single site-catalyzed, low molecular weight propylene copolymer, preferably with an Mw less than 60,000 g/mol; and polyisobutene. The composition may optionally include a plasticizer, a butene-rich copolymer, and an antioxidant. The hot melt adhesive is especially useful for bonding substrates which swell or elongate significantly in use. Such uses include adhering superabsorbent polymers to a substrate or adhering together two substrates, at least one of which has superabsorbent polymers, such as the layers of an absorbent core of a disposable hygiene article, such as a diaper. The composition, which does not contain a tackifier, demonstrates suitable elongation at break, stress retention, and thermal stability, making it well-suited for stabilizing expanded species such as superabsorbent polymers.