Effects of model coal tar components on adhesion strength of polyurethane coating on steel plate

Yokoyama, Naoki; Fujino, Kenichi

doi:10.1007/bf02733887

Cited by 3 publications

(5 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is considered that the phenomena could be caused by effusion of Ph and [St] n -Ph into water. It has been described in earlier papers that a weak point of the phenolic additives is effusion into water [20,22]. As shown in the above results, it can be found that the weak point could be solved by using [In] n -Ph for a new phenolic additive.…”

Section: Soaking Tests In Watersupporting

confidence: 56%

“…It would be due to the fact that the motion of the matrix chains of polyurethanes is restricted by the presence of the phenolic additives. Phenol showed the highest restriction [19][20][21].…”

Section: Dmamentioning

confidence: 99%

“…The current authors have also investigated the substitution additives [20][21][22][23][24] to find what components in coal tar are effective in enhancing anticorrosion, the properties of polyurethane containing some polycyclic aromatic compounds for model coal tar components were studied. It was found that anticorrosion of the polyurethane was enhanced by addition of the phenolic additives of phenol, 2-naphthol, etc.…”

mentioning

confidence: 99%

“…It was found that anticorrosion of the polyurethane was enhanced by addition of the phenolic additives of phenol, 2-naphthol, etc. [20]. Although the above phenolic additives are not carcinogens, they are considered hazardous.…”

mentioning

confidence: 99%

“…In earlier studies, on the polyurethane coatings containing 2-naphthol, the tests of effusion into water were carried out at 23 C for 80 days. It was found that 0.2 wt% of 2-naphthol effused into water [20].…”

mentioning

confidence: 99%

See 4 more Smart Citations

Properties of Polyurethane Containing New Phenolic Additives

Yokoyama

Omori²,

Yanai³

2007

Journal of Elastomers & Plastics

Self Cite

View full text Add to dashboard Cite

For non-tar anticorrosive polyurethane coatings, polyurethane containing phenolic additives (i.e., phenol, styrene adducts with phenol ([St] n—Ph), and indene adducts with phenol ([In]n—Ph)) are prepared and the effusion properties are investigated. As an index on the effusion, the weight change of the polyurethane sheets soaked in water as a function of the soaking time and total organic carbon (TOC) in the water used for the soaking tests are measured. Only the weight of the polyurethane sheet containing [In]n—Ph did not decrease during the soaking test and the TOC was the least. Furthermore, the properties of the phenolic additives plasticizers or `antiplasticizer' are investigated. Although the density and the coefficient of thermal expansion of polyurethane containing [In]n—Ph are increased, since the tensile strength decreased and the elongation increased, [In]n—Ph will be regarded as a plasticizer rather than `antiplasticizer'.

show abstract

Section: Soaking Tests In Watersupporting

confidence: 56%

Section: Dmamentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Properties of Polyurethane Containing New Phenolic Additives

Yokoyama

Omori²,

Yanai³

2007

Journal of Elastomers & Plastics

Self Cite

View full text Add to dashboard Cite

show abstract

Properties of polyurethane coatings containing additives of phenolic compounds

Yokoyama¹

2006

J of Applied Polymer Sci

View full text Add to dashboard Cite

The properties of polyurethane containing five kinds of model phenolic additives were investigated. The IR spectra of polyurethane containing phenolic additives indicated that the phenolic additives reacted with isocyanate groups in a polyisocyanate compound. For an index of anticorrosion, the tensile adhesion strength was measured for polyurethane coatings with phenolic additives on steel plates treated with the salt-water spraying test for 3000 h. It was found that there was a relationship between the tensile adhesion strength of polyurethane and the density. We considered the reason to be that the increase in density (i.e., a reduction in free volume) should provide a route to reduce salt-water access to an adhesive bond. The increase in density was explained by the term antiplasticizers, which means that the phenolic additives reduce the free volume that is available for molecular motion in the stiff chain of polyurethane. In the polyurethanes with every phenolic additive, the elongation was increased, the moduli were decreased, the storage modulus was decreased, and the coefficient of thermal expansion was increased. These phenomena are the characteristics of plasticizers. Thus, the phenolic additives have both the character of antiplasticizers and plasticizers, but the polyurethane with phenolic additives had more characteristics of plasticizers than those of antiplasticizers.

show abstract

Bibliography

2024

Corrosion and Corrosion Protection of Wind Power Structures in Marine Environments

View full text Add to dashboard Cite

Effects of model coal tar components on adhesion strength of polyurethane coating on steel plate

Cited by 3 publications

References 1 publication

Properties of Polyurethane Containing New Phenolic Additives

Properties of Polyurethane Containing New Phenolic Additives

Properties of polyurethane coatings containing additives of phenolic compounds

Bibliography

Contact Info

Product

Resources

About