Dow Global Technolgoies LLC

Rohm and Haas Company

University of Minnesota

Vinita Yadav

Kalyan Sehanobish

Xiaosong Wu

Cristina Serrat

William Bryan Griffith, Jr

Vivek Kalihari

Melinda L Einsla

Daniel W Himmelberger

Lorraine F Francis

Saswati Pujari

Josephine Eldredge

Wieslaw J Suszynski

Miao Yang

Mario De Filippis

Zhaohui Qu

Cathie Seyfried

Alireza Mohammad Karim

Marcio S Carvalho

Chuan-Yar Lai

Isabelle Uhl

Jr William B Griffith

Water-based pressure sensitive adhesive compositions are disclosed comprising (a) an acrylic emulsion having a glass transition temperature of less than or equal to 20° C., (b) optionally, a dispersant or a silane-containing compound, and (c) an ethylene or propylene copolymer emulsion. In some embodiments, (a) comprises from 75 to 99 wt % of the compositions, (b), when present, comprises from 0.1 to 5 wt % of the compositions, and (c) comprises from 0.1 to 25 wt % of the composition, each based on the dry weight of the compositions. Methods for preparing water-based pressure sensitive adhesive compositions are also disclosed comprising emulsion polymerizing at least one unsaturated monomer, thereby forming an emulsion polymer having a glass transition temperature of less than or equal to −10° C. and blending the emulsion polymer together with a dispersant or silane-containing compound and an ethylene or propylene copolymer emulsion. Water-based pressure sensitive adhesives and pressure sensitive adhesive films are also disclosed.

Water-based pressure sensitive adhesive compositions and methods of making same

The present disclosure includes a composition that includes an ethylene/&#x3b1;-olefin random copolymer having density of 0.890 g/cmor less, a melting point of 100&#xb0; C. or less, and a melt index from 0.2 g/10 min to 8.0 g/10 min, a styrenic block copolymer comprising from 1 wt % to less than 50 wt % units of styrene, a tackifier, and an oil. The composition may exhibit an overall melt index of the composition of from 2 g/10 min to 15 g/10 min. The composition can be used as an adhesive in some embodiments. The present disclosure also includes multilayer films that include the composition, which may provide reclose functionality to the multilayer film. The multilayer films that include the composition may provide low initial opening force and improved reclose adhesion through multiple reclose cycles. The present disclosure also includes various types of reclosable packaging articles that include the multilayer films and adhesive compositions.

Compositions and multilayer films for reclosable packaging

Methods of curtain coating substrates are disclosed. In some embodiments, the methods include applying two or more liquid layers simultaneously to a substrate, wherein the multiple layers include a bottom liquid layer comprising a shear thinning liquid, and another liquid layer comprising a viscoelastic liquid. In some embodiments, the disclosed methods include formulating a bottom layer liquid comprising a shear thinning liquid, formulating another layer liquid comprising a viscoelastic liquid, pumping the bottom layer liquid and the other layer liquid through coating dies simultaneously and onto a moving substrate such that the bottom layer liquid impinges on the substrate thereby forming a bottom layer, and the other layer liquid forms another liquid layer above the bottom liquid layer. The inclusion of a bottom liquid layer comprising a shear thinning liquid and other layer comprising a viscoelastic liquid provides for enlargement of the curtain coating window.

Methods for curtain coating substrates

Growing community of inventors

Royersford, PA, United States of America

Vinita Yadav