Effects of Solubility Difference of Tackifier to Respective Components of Block Copolymers on Microphase-Separated Structures in Coated Layers of Pressure-Sensitive Adhesive Prepared by Solution Coating Process

2020 ◽  
Vol 2 (11) ◽  
pp. 4973-4984
Author(s):  
Takahiro Doi ◽  
Hideaki Takagi ◽  
Nobutaka Shimizu ◽  
Noriyuki Igarashi ◽  
Shinichi Sakurai
Keyword(s):  
Block Copolymers ◽  
Coating Process ◽  
Pressure Sensitive Adhesive ◽  
Pressure Sensitive

Rubber-Styrene Block Copolymers in Adhesives

1982 ◽  
Vol 55 (1) ◽  
pp. 208-218 ◽  
Author(s):  
D. J. St. Clair
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Network Structure ◽  
High Strength ◽  
Pressure Sensitive Adhesive ◽  
Performance Requirements ◽  
Pressure Sensitive ◽  
Type Form ◽  
Physically Crosslinked ◽  
Rubber Block

Abstract Rubber-styrene block copolymers are materials such as the A-B-A type block copolymers, where A represents a block of polystyrene and B represents a rubber block, usually polybutadiene, polyisoprene or an olefin rubber. Because polymers of this type form a physically crosslinked network structure, the polymers are thermoplastic as well as being strong and rubbery. Because of their unique structure, block copolymers are well suited for use in a wide variety of adhesives. Block copolymers can be formulated with resins, plasticizers, and fillers to meet performance requirements ranging from those of a soft, tacky pressure-sensitive adhesive to those of a stiff, high strength construction or assembly adhesive. Adhesives based on the block copolymers can be mixed and applied, either in solvent or as hot melts, using standard processing equipment. Research is continuing on block copolymer technology, formulating technology, and processing technology which should further expand the applications of block copolymers in adhesives.

The Entanglement Plateau in the Dynamic Modulus of Rubbery Styrene—Diene Block Copolymers. Significance to Pressure-Sensitive Adhesive Formulations

1979 ◽  
Vol 52 (2) ◽  
pp. 278-285 ◽  
Author(s):  
G. Kraus ◽  
K. W. Rollmann
Keyword(s):  
Molecular Weight ◽  
Block Copolymers ◽  
Simple Procedure ◽  
Continuous Phase ◽  
Low Molecular Weight ◽  
Glass Transitions ◽  
Pressure Sensitive Adhesive ◽  
Pressure Sensitive Adhesives ◽  
Pressure Sensitive ◽  
Dynamic Storage

Abstract Styrene-diene (butadiene or isoprene) block copolymers of the SDS or (SD−)x type exhibit a plateau in the dynamic storage modulus located between the glass transitions of the polydiene and polystyrene domains. When the polydiene is the continuous phase, the height of this plateau can be estimated with good success from the entanglement spacing molecular weight of the polydiene and the filler effect of the polystyrene domains. The effect of introduction of a center block-compatible diluent can also be calculated, although the simple procedure used here tends to underestimate the plasticizer effect, particularly at high diluent concentration. Nevertheless, the calculation furnishes a useful criterion of compatibility of the polydiene center blocks and low molecular weight resins used commonly as tackifiers in pressure-sensitive adhesives. Center block compatibility is essential for the development of tack in these compositions.

Passivation of pressure sensitive adhesive stickies by addition of acrylic fibers to OCC pulp before papermaking

TAPPI Journal ◽  
2016 ◽  
Vol 15 (10) ◽  
pp. 631-639
Author(s):  
MOHAMMAD HADI ARYAIE MONFARED ◽  
HOSSEIN RESALATI ◽  
ALI GHASEMIAN ◽  
MARTIN A. HUBBE
Keyword(s):  
Adverse Effects ◽  
Control Sample ◽  
Pressure Sensitive Adhesive ◽  
Acrylic Fiber ◽  
Burst Strength ◽  
Pressure Sensitive Adhesives ◽  
Pressure Sensitive ◽  
Tear Index ◽  
Breaking Length ◽  
Acrylic Fibers

This study investigated the addition of acrylic fiber to old corrugated container (OCC) pulp as a possible means of overcoming adverse effects of water-based pressure sensitive adhesives during manufacture of paper or paperboard. Such adhesives can constitute a main source of stickies, which hurt the efficiency of the papermaking process and make tacky spots in the product. The highest amount of acrylic fiber added to recycled pulps generally resulted in a 77% reduction in accepted pulp microstickies. The addition of acrylic fibers also increased pulp freeness, tear index, burst strength, and breaking length, though there was a reduction in screen yield. Hence, in addition to controlling the adverse effects of stickies, the addition of acrylic fibers resulted in the improvement of the mechanical properties of paper compared with a control sample.

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