Page 452 - Handbook of Adhesives and Sealants

390 Chapter Ten

TABLE 10.16 Performance of Cyanoacrylate Adhesives on Various Substrates 26
Shear strength,
2
Age of lb/in. of
Substrate bond adhesive bonds
Steel–steel ................................. 10 min 1,920
48 h 3,300
Aluminum–aluminum ....................... 10 min 1,480
48 h 2,270
Butyl rubber–butyl rubber................... 10 min 150*
SBR rubber–SBR rubber .................... 10 min 130
Neoprene rubber–neoprene rubber ........... 10 min 100*
SBR rubber–phenolic........................ 10 min 110*
Phenolic–phenolic........................... 10 min 930*
48 h 940*
Phenolic–aluminum ......................... 10 min 650
48 h 920*
Aluminum–nylon ........................... 10 min 500
48 h 950
Nylon–nylon................................ 10 min 330
48 h 600
Neoprene rubber–polyester glass ............. 10 min 110*
Polyester glass–polyester glass ............... 10 min 680
Acrylic–acrylic .............................. 10 min 810*
48 h 790*
ABS–ABS .................................. 10 min 640*
48 h 710*
Polystyrene–polystyrene ..................... 10 min 330*
Polycarbonate–polycarbonate................. 10 min 790
48 h 950*
*Substrate failure.

uids. These systems provide the ability to bond to substrates such as
wood, leather, and fabrics which have been notoriously difficult sub-
strates for bonding with cyanoacrylate adhesives.

10.3.12 Modified acrylics
Modified acrylic adhesives are thermosetting systems that are also
called reactive acrylics to separate them from other acrylic resins that
are normally used in thermoplastic, pressure sensitive applications.
Thermosetting acrylic adhesives are two-part systems that provide
high shear strength to many metals and plastics as shown in Table
10.17. Acrylic structural adhesives use the same types of chemical
components in their formulation as the original anaerobic adhesive.
Modern formulations are based on crosslinked polymethyl methacry-
late grafted to vinyl terminated nitrile rubber. Carboxy terminated
rubbers, similar to those used in toughened epoxy adhesives, and ne-
oprene have also been used. Chlorosulfonated polyethylene has also