Epoxy Laminating resin

Unipoxy. [Rbr Iass Everooat] Epoxy laminating resin. 

A white pigmented, epoxy laminating resin, available in two viscosities (3,000-3,500cps and 2,000cps) and with respective pot-lives of 20-30 and 50-60 mins. Respective cures e 25"C are 8-12 and 24-48 hours, k. 76 I. 50 m. 4.8 (typical)... 

A 100% reactive, clear, unfilled epoxy laminating resin offering excellent moisture and chemical resistance, and good impact resistance at low temperature, a. 1.5 c. 2500cps k. 213 I. 203 m. 11.3... 

A Clear and rigid, unfilled room temperature cure, tough, strong, good heat distortion temperature and chemical resistant, epoxy laminating resin, a. 1.16 i. 190 C k. 265 m. 12.7... 

A low cost, clear epoxy laminating resin for small parts and thin skin lay-ups such as wind surf boards. Four hardeners are available, 382, C-201, LH-101 and SC-150-N. a. 1.13 i. 46 C k. Ill I. 74 m. 3.9... 

A tough, hard, impact resistant, room temperature cure epoxy laminating resin, offering excellent heat distortion resistance for tools operating at elevated temperature. Two alternative hardeners are available, HT-8401 and HT-9234. 

A white, low odour, low viscosity, low toxicity epoxy laminating resin designed for close dimensional tolerance automotive and aircraft tooling applications, offering high impact resistance. Two hardeners are available, LH-101 offering a standard room temperature cure, and C-201 offering a slow room temperature cure. 

Epoxy laminating resins Preferred material for mid-size and large models Attention stiffening ribs or profile rack frames have to be laminated for stability reasons ... 

The thermal stabiUty of epoxy phenol—novolak resins is useful in adhesives, stmctural and electrical laminates, coatings, castings, and encapsulations for elevated temperature service (Table 3). Filament-wound pipe and storage tanks, liners for pumps and other chemical process equipment, and corrosion-resistant coatings are typical appHcations using the chemically resistant properties of epoxy novolak resins. 

Laminating resins. CNSL resins are added to laminates based on phenol-formaldehyde, epoxy, etc. to reduce brittleness and to improve flexibility of the product. The resins also exhibit better age hardening and improved bonding to the substrate [133,134,137,168]. 

Sohi. M.M., Hahn, H.T. and Williams, J.G. (1987). The effect of resin toughness and modulus on compressive failure modes of quasi-isotropic graphite/epoxy laminates. In Toughened Composites. ASTM STP 937 (N.J. Johnston cd.). ASTM. Philadelphia, PA. pp 37 60. 

Williams, J.G. and Rhodes, M.D. (1982). Effect of resin on impact damage tolerance of graphite/epoxy laminates. In Composite Materials Testing and Design (6th Conf.) ASTM STP 787 (l.M. Daniel ed.). ASTM, Philadelphia, PA. pp 450 80. 

Figures 10 and 11 show a manufacturing application in which a resin s flow properties are measured in-sltu at a particular point in a thick laminate during cure in an autoclave. The sensor was inserted on the tool surface and in the center of a thick 192 TGDDM graphite epoxy laminate. Figure 10 shows the noise free raw data taken by the center sensor during cure in the 8x4 foot production size autoclave. Using the procedures described, the ionic mobility was measured at both the tool surface and the center of the thick laminate. In Figure 11, the sensor values of a show a 10 to 20 minute time lag in the point of maximum flow on the surface versus the laminate s center. Measurements of a versus q, as shown in...

For thick epoxy laminates processed in the autoclave, voids once formed and stabilized can only be removed by dissolution or by resin flow. Furthermore, resin gradients are deleterious to structural laminates. These two key phenomena make an understanding of resin transport vital to the development of any processing model. 

Figure 6.11 Resin pressure profiles in the laminate thickness direction (vertical) in a 1.4-in. thick unidirectional graphite-epoxy laminate for one-dimensional flow (edge-dammed) under conditions indicated in the figure...

Tetrabromobisphenol A epoxy resins are available as viscous liquids with several molecular weight ranges. As the bromine content increases, the flame resistance increases but the viscosity of the resin generally increases as well. They are primarily used as an additive in formulations producing epoxy laminates and adhesives that require improved resistance to ignition. 

Thornel 300 carbon-fiber-reinforced Fiberite 934 epoxy laminates (ca. 60% fiber and 40% resin by volume) were fabricated from prepreg tapes manufactured by Fiberite Corporation. The details of this fabrication process have been disclosed elsewhere ni). Panels of suitable lamination sequence were prepared from prepreg types. These panels were cured in an autoclave held for 0.5 hour at 135 °C and 2.0 hour at 180 °C, under 6.8 atm of pressure. 

Fig. 5. Structure of FET sensor with two discrete FET chips 1, connectingwire 2, epoxy resin 3, platinum wire 4, FET chip 5, enzyme-immobilized membrane 6, epoxy laminate. (Reproduced from Nakako et al. (26), with permission.)...

Two types of cloth are used. The first is "S" type fiberglass, superior to "E" type cloth sold to the public. The second is Kevlar 49, the same a ramid fiber fabric used in Second Chance Flexible Body Armor. Both types of cloth are treated or scoured to make the surface compatible with a variety of laminating resins, including vinylester, polyester and epoxy. 

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