Methacrylate prepolymer containing triazine ring structure, its

Details Methacrylate prepolymer containing triazine ring structure, its Methacrylate prepolymer containing triazine ring structure, its

1992-10-30

1994-03-22

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526227, 5262196, 526 90, C08F22606, C08F 434, C08F 404, C08F 442

Patent

active

052965716

ABSTRACT:
An aminotriazine prepolymer is provided which gives resin with toughness and favorable transparency without use of filler agent by mixing 2-hydroxyethyl methacrylate (781 g: 6 mole), melamine (126 g: 1 mole), 95% by weight of p-formaldehyde (189 g: 6 mole as formaldehyde), p-toluene sulfonate (3.0 g), hydroquinone monomethyl ether (0.2 g) in a two liter separation flask with a stirring device, a thermometer, an air-inlet tube, and a cooling tube for removing the distillate. The mixture is heated while air is blown in. After the melamine and paraformaldehyde are dissolved in 2-hydroxyethyl methacrylate, at the temperature of 80.degree. C. to 100.degree. C., the reaction is continued in the temperature range of 105.degree. C. to 115.degree. C. until the quantity of extracted water is 108 g (6 mole). The triazine ring structure-containing methacrylate prepolymer thus obtained has a viscosity of 2,000 cP at 20.degree. C., a bromine number of 92.1 (Br g/100 g), and a Gardner color degree of not greater than 5.

REFERENCES:
patent: 3020255 (1962-02-01), Magrane et al.
Giacobbe, T. J. Macromolecules, vol. 4, No. 5, pp. 630-632 (1971).

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