Polyester adhesives

Other minor uses include bonding polyester laminates to polyester or to metal, and as adhesives for optical equipment. CR-39 allyl diglycol carbonate is an example of the latter. This material, in the cured condition, exhibits improved abrasion and chemical resistance over other transparent adhesive resins and displays the good heat resistance and dimensional stability associated with thermosetting systems. These properties are retained on prolonged exposure to severe environmental conditions. CR-39, which stands for Columbia Resin 39, is an allyl resin, a special type of unsaturated polyester.  

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The structure—N/C-coated cellophane/polyethylene/aluminum foil/ adhesive/50ga polyester/adhesive/polyethylene—had a shelf life of over 6-9 months with no moisture, flavor, or color loss. This barrier system contained the product successfully (see Table IV). 

Materials. The single films and multilayered materials examined are listed in Tables I and II, respectively. The adhesive (10thick) between any two layers was a two-component curing, epoxy—polyester adhesive, Adcote 503A, Morton Chemical Co. Pouches (11.5 X 17.8 cm) were made from the multilayered materials by heat sealing the sides and bottom under the optimum heat sealing conditions (3). 

About 8,000 metric tons of peroxides were consumed in 1972. This consumption was strongly stimulated by the rapid growth in reinforced plastics (Ref 23). The largest volume product is benzoyl peroxide which is used in polystyrene and polyester markets for such items as toys, automobiles, furniture, marine, transportation and mil requirements. Also, methyl ethyl ketone peroxide is used in large volumes to cure (as a catalyst) styrene-unsatur-ated polyester adhesive resins used in mil ammo adhesive applications, as well as in glass fiber reinforced plastic products such as boats, shower stalls, tub components, automobile bodies, sports equipment, etc. The monoperesters are growing slowly because of some substitution of the peroxydicarbonates and azo compds (Refs 8,9 23)... 

A typical oxyfluorination treatment that is sufficient to activate polyolefin surfaces with respect to polyester adhesion includes the following ... 

Some postactivation liquid degreasers will totally destroy the adhesion of epoxy adhesives to a fluorinated plastic surface, while having no effect on the adhesion of polyester adhesives. 

Typical surface preparation calls for cleaning with acetone, MEK, or other common solvent. Once clean, the substrate is then mechanically abraded with sand, grit or vapor blast, or steel wool. The surface is again wiped clean with fresh solvent. Typical adhesives that are employed include epoxies, urethanes, and cyanoacrylates. Polysulfides, furanes, and polyester adhesives have also been suggested. 

Samples for adhesion measurements were prepared in a separate chamber with a base pressure of 1 x 10 ° Torr under identical conditions. Typically, -1000 A silver coverages were used for adhesion measurements. Adhesion strength of the deposited Ag films was determined using a polyester adhesive tape and standard peel test procedures on an Instron tester. 

Polyester Adhesives used include neoprene or nitrile-phenolic, epoxy, epoxy-polyamide, phenolic-epoxies, polyesters, modified acrylics, cyanoacrylates, polyurethanes, butyl rubber, polyisobutylene, neoprene, and polymethylmethacrylate (1). 

Use Organic synthesis, lacquers, product of hydrotropic salts, alkyd resins, polyamides, polyester adhesives, low-temperature plasticizers, urethane elastomers. 

Use Biochemical research intermediate nutrition prepraration of polyesters, adhesives cellulose modifier leather tanning. 

Series (9305,9310) 9400 Series (9410) - polypropylene, paint, coatings, polyester, adhesives... 

We synthesized a new class of water-soluble polyester adhesives. We demonstrated that to ensure very strong adhesive properties certain compositional boundaries must be maintained. The optimal composition is the following ... 

These copolymers have a wide range of possible applications. DHA-co-4VP and DHA-co-NVP copolymers are excellent for rubber-steel and rubber-polyester adhesive systems respectively. In addition, quaternized DHA-co-4VP copolymers promote strong adhesion of rubber to polyester tire cord in vulcanized composites. 

Chem. Descrip. 2,4-Dihydroxybenzophenone CAS 131-56-6 EINECS/ELINCS 205-029-4 Uses UV absorber, light stabilizer for polymethyl methacrylate, PS, elastomers, cellulosics, epoxy resins, polyesters, adhesives, lacquers Regulatory DOT nonregulated... 

Uses Crosslinking agent for peroxide-cured rubber compds., irradiated coatings, polyesters, adhesives, concrete polymers, dental polymers, electronics, inks, plastisols, sealants Trade Names Bisomer E(2)BADMA Bisomer E30W Trade Names Containing Bisomer E(10)BADMA... 

Figure 3.2 Long-term strength <73 of St3 adhesive-bonded joints at various loadings (1, 3, 5), Sprut-5M (4) polyester adhesive.

A second reason for the decrease in internal stresses in IPN-based adhesives is their low shrinkage. To separate these two factors, the rate of MDI curing was increased hy adding 2,4-hutylene glycol to the adhesive. As Fig. 4.9 displays, the internal stresses increased somewhat but nevertheless remained much lower than those of the pure polyester adhesive. The shrinkage of the adhesive layer, which causes the internal stresses, was determined by Equation (4.49). For the IPN-based adhesive (with added 2,4-butylene glycol) it appeared on average to be 2.6 times less than that of the adhesive based on polyester. 

Figure 4.9 Change of the adhesion strength of the adhesive-bonded joints with time (1) adhesive based on IPN (2) polyester adhesive (3) pol5mrethane adhesive.

Figure 4.10 Kinetics of internal stress elevation and relaxation (1) polyester adhesive (2) IPN-based adhesive with added 2,4-butylene glycol (3) the same with additives.

Impurities in the water have a great effect on the water resistance of the joints. The maximal strength decrease of glass-reinforced plastics is caused by distilled water. The strength of steel joints cemented with adhesive based on the Epoxy-1000 resin decreased by 44% when subjected for 60 days to rainwater, by 21% with river water, and by 18% with sea water. Adhesives based on PN polyester resin form comparatively water-resistant joints with glass-reinforced plastics [211], while steel joints cemented by these adhesives are not water-resistant. When subjected to warm (60°C) water for 400 h and to boiling water for 120 h, the strength of steel joints bonded by polyester adhesives decreased 3—4 times. 

The epoxy, acrylate, polyurethane, and polyester adhesives described earlier in Chapter 2 were used for investigations, and RS agents were used to control the interphase tension. Water resistance was evaluated by the retention of strength of the joints after hold-up in water for 30 days no noticeable hydrolysis was observed in this period. 

Figure 5.5 Dependence of the specific electrical resistance at the polyester adhesive-steel interface on the holding time of the joint in water (1) initial adhesive (2) with addition of 10% ATG.

Figure 5.6 shows the dependence of the adhesion strength of steel adhesive-bonded joints on the holding time in hquids. Acrylate (curves 1 and 3) and polyester (curve 2) adhesives were used. In this particular case the polyester adhesive was based on PN 609-2IM unsaturated polyester resin, and the acrylate adhesives were based on MMA (1) and ethyl methacrylate (3). 

Synonyms 2,3-Dihydroxypropanal Glyceric aldehyde Glycerose Empirical CsHeOs Formula HOCH2CH2OCHO Properties Tasteless cryst. insol. in benzene, petroleum ether, pentane m.w. 90.09 m.p. 145 C Toxicology LDLo (oral, rat) 5 g/kg Uses Biochemical research intermediate nutrition preparation of polyesters adhesives cellulose modifier leather tanning... 

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