Solvent Resistance Properties Research Articles

Polythiourethane polymers using castor oil tristhioglycolate as crosslinking agent

Polythiourethane polymers were synthesized from a few glycol polythioglycolates and TDI or MDL Castor oil tristhioglycolate, a new trithiol, was tried as a crosslinking agent. Mechanical and solvent resistance properties of the cured products are reported.

Polyblends of polystyrene glycol and alkyd in surface coatings

Polystyrene glycol was prepared and incorporated into linseed alkyd. Compatibility of polystyrene glycol and alkyd was investigated. It was found that 20 per cent polystyrene glycol could successfully be blended with linseed alkyd. Film properties of these blends were examined and compared with those of plain alkyd. It was observed that polystyrene glycol modified linseed alkyds were superior, in film properties, to the plain alkyd except in solvent resistant property.

Polyhexaallylmelamine and related polymers

AbstractThermoset polymers result when hexaallylmelamine and related monomers, such as 2,4‐bis(diallylamino)‐6‐piperidino‐s‐triazine, are polymerized with di‐tert‐butyl peroxide or 2,5‐dimethyl‐2,5‐di(tert‐butylperoxy)‐n‐hexane. Advantageous properties of the new systems when filled with glass fabric include high mechanical strength and modulus at elevated temperatures, solvent resistance, and excellent electrical properties, especially dielectric constant, dissipatio factor, and arc resistance. Although glass cloth‐reinforced laminates of the resins are stable to almost 400°C. in nitrogen, oxidatively they are much less stable. Nevertheless, these new resin systems have certain advantages in comparison with silicone resins and should be useful for structural and electrical applications in air to above 200°C.

Gasoline Diffusion Resistance of Thiokol Type F

Abstract The solvent-resistant properties and low swelling characteristics of Thiokol synthetic rubbers are well known to the rubber technologist. It is also known that these rubbers are highly resistant to permeation by solvents. Gasoline and blends of gasoline and benzene do not diffuse into and through them to any great extent. The permeation of rubber and synthetic rubbers by fixed gases, such as hydrogen and helium, has been the subject of considerable study. Such information has a bearing on the construction of dirigibles, blimps, observation balloons, and barrage balloons. Sager shows that the ratio of permeability to hydrogen for Thiokol Type DX (now Type F), compared to rubber at 25° F, is 1 to 12. Recently the diffusion of gasoline and oil through solvent-resisting synthetic rubbers has become of general interest. The information generally sought is the amount of gasoline that diffuses through a given area in a given time.