Silicone pressure sensitive

Sobieski, L. and Tangney, T.J., Silicone pressure sensitive adhesives. In Handbook of Pressure Sensitive Adhesive Technology. Satas Donatas Ed., Van Nostrand Reinhold, New York, 1989, pp. 508-517. 

Ulman, K.L. and Thomas, X., Silicone Pressure Sensitive adhesives for healthcare applications. In Advances in Pressure Sensitive Adhesive Technology-2. Satas Donatas Ed., Satas and Associates, Rhodes Island, 1995, pp. 133-157. 

P.W. Pretzer and R.P. Sweet, Silicone pressure sensitive adhesive composition containing functionalized polyisobutylene, US Patent 5 939 477, assigned to Dow Coming Corporation (Midland, MI), August 17,1999. 

Polymer-polymer Organic pressure-sensitive adhesive release coating Silicone pressure-sensitive adhesive... 

Organosilicone Coating Products. Silicone products are used in a large variety of coatings applications most prominent among these are silicone pressure-sensitive adhesives (PSA), plastic hardcoats, and paper release coatings (398,399). 

Two other classes of silicones deserve mention. These are the water-based silicones that are used in sealant and coating applications and the silicone pressure-sensitive adhesives. Water-based silicones can be prepared by anionic polymerization of siloxanes in water using a surface-active catalyst such as dodecylbenzenesulfonic acid [4]. The resulting emulsion can then be cross-linked in several ways, including the use of alkoxysilane copolymerization or tin catalysts in conjunction with colloidal silica. The result is essentially an emulsion of cured PDMS in water. Various fillers and other components are added, resulting in a sealant composition. Upon evaporation of water. 

ATR-FTIR spectroscopy was used to monitor the uptake of urea into a silicone polymer. Analysis of the time-dependent changes in the IR absorbances of urea and silicone leads to an estimate of the diffusion coefficient for urea that is in close agreement with a value obtained using a bulk transport method (involving radiolabelled permeant). The silicone polymer was medical grade silicone pressure-sensitive adhesive (X7 201). ATR-FTIR is proposed as a rapid and accurate method of rapidly and accurately determining solute diffusion within a polymer matrix. 12 refs. 

B. C. Copley, "Dynamic Mechanical Properties of Silicone Pressure Sensitive Adhesives," in Ref. 14. 

The paper by Copley presents a study of two types of silicone pressure-sensitive adhesives, of known composition, by dynamic mechanical and thermal analysis. The materials were prepared from a siloxane resin and two silicone gums poly(dimethylsiloxane) and poly(dimethyl-co-phenylsiloxane). 

Dynamic Mechanical Properties of Silicone Pressure-Sensitive Adhesives... 

The chemistry of silicone resins and siloxane gums used to prepare silicone pressure sensitive adhesives is briefly reviewed. The thermal, dynamic mechanical and X-ray scattering properties of the silicone adhesives is presented. A specific morphological model for the silicone pressure sensitive adhesives is proposed based on the characterization data. The results for adhesives prepared from polydimethyl siloxane gums is compared to adhesive prepared from polydimethyl-co-diphenyl siloxane gums. 

The many novel properties and applications of silicone pressure sensitive adhesives (psas) have been discussed in numerous publications (1-5) Silicone adhesives exhibit excellent high temperature stability, good low-temperature properties, and good adhesion to low-energy surfaces such as fluorocarbons and silicones. Most of the major applications utilize one or more of these novel properties. 

Blends of the MQ resin with high molecular weight siloxane gum which may be cross-linked by the addition of benzoyl peroxide result in silicone pressure sensitive adhesives. The purpose of this work is to examine the dynamic mechanical properties of the formulated adhesives in an effort to understand how the silicone resins and gums interact to form a pressure sensitive adhesive. A specific morphological model as suggested by experimental results will be discussed. 

Silicone pressure sensitive adhesives appear to be heterogeneous blends of MQ resin and a gum. A gum phase containing little if any dissolved resin is observed in the PDMS adhesive. A resin phase probably containing low molecular weight PDMS is detected by dynamic mechanical analysis. The PDMDPS adhesives are similar, except that the... 

The most prominent use of MQ resins is as the tackifying agent for silicone pressure-sensitive adhesives (PSA) (523-525). The other main component of silicone PSA is a silicone gum. This mixture of MQ resin and silicone gum is applied to a tape backing such as polytetrafluoroethylene (FIFE) or poly(ethylene... 

The results are reported of an investigation into the stability, in-vitro drug delivery and adhesive properties of drug-in-adhesive transdermal drug delivery systems. These systems are composed of a flexible backing film, a fluoropolymer release liner and active adhesives, which vary in their monomeric compositions and functionalities. The adhesives are composed of an acrylic pressure-sensitive adhesive, an amine-compatible silicone pressure-sensitive adhesive and methylphenidate base, as the drug. 4 refs. 

Ulman KL, Thomas X (1995) Silicone pressure sensitive adhesives for healthcare applications. In Satas D (ed) Advances in pressure sensitive adhesive technology, vol 2. Satas, Warwick Rl, pp 133-157... 

Electrical insulating tapes made from silicone elastomers or silicone-resin coated glasscloth or mica paper are also widely used. Polyester or polyimide tapes are also available with heat-resistant silicone pressure-sensitive adhesive coatings. 

D. F. Merill Silicone Pressure Sensitive Adhesives in D. Satas (ed.) Handbook of Pressure Sensitive Technology, 1st ed.. Van Nostrand Reinhold, New York 1982. 

Silicone. Silicone pressure-sensitive adhesives have low shear strength but excellent peel strength and heat resistance. Silicone adhesives can be supplied as solvent solutions... 

TABLE 7.28 Effect of Temperature and Aging on Silicone Pressure-Sensitive Tape (Aluminum Foil Backing) (from Ref. 3 ... 

Lin SB. New silicone pressure-sensitive adhesive technology. Int J Adhes Adhes. 1994 14 (3) 185-191. 

The chemistry of silicone sealants is much the same as that discussed above for silicone pressure-sensitive and mbber-based adhesives, with the exception of the MQ taddfier addition. The basic polymer for silicone sealants is that based upon poly (dimethyl siloxane)diol. This material can be cured by any one of a number of polyfunctional curing agents, all of which are based upon tetrachlorosilane. Thus, such materials as methyl triacetoxysilane or methyl trimethoxysilane can be used in conjunction with a poly(dimethyl siloxane)diol to yield a room... 

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