Process for preparing dry, laminating impregnated papers or clot

Details Process for preparing dry, laminating impregnated papers or clot Process for preparing dry, laminating impregnated papers or clot

1975-04-01

1977-11-08

Van Horn, Charles E.

Stock material or miscellaneous articles

Composite

Of polyester

156331, 156332, 260850, 260856, 427391, 427439, 428530, 428535, 428482, B32B 2706, B32B 2710, C09J 500

Patent

active

040576744

ABSTRACT:
In preparing a dry, laminating impregnated paper or cloth by impregnating a paper or cloth with a resin solution containing a polymerization catalyst, a cross-linking monomer and, if necessary, a releasing agent, followed by drying, the use as the resin of a resin composition consisting of (A) 10 to 90 % by weight of an organic solvent-soluble diallyl phthalate prepolymer having an average molecular weight of 2,000 to 20,000 and a softening point of 70.degree. to 140.degree. C. which prepolymer has been obtained by partially polymerizing a diallyl phthalate monomer and separating and purifying the resulting prepolymer, and 90 to 10 % by weight, in total, of (B) an organic solvent-soluble non-crystalline unsaturated polyester and (C) an organic solvent-soluble benzoguanamine resin obtained by condensing in an alkaline reaction system 1 mole of benzoguanamine with 1 to 4 moles of formaldehyde, the weight ratio of (C)/(B) being up to 0.85 and the amount of (C) being at least 2 % by weight of the total weight of (A), (B) and (C), results in a stickiness-free impregnated paper or cloth. The thus obtained impregnated paper or cloth is laminated to a proper base plate, or two or more of the impregnated paper or cloth are laminated to each other, to obtain a laminate with an overlay excellent in transparency. When the above-mentioned impregnated paper or cloth is used, a laminate having a favorable gloss can be obtained even when the laminate is taken out of the press without cooling at the time of lamination.

REFERENCES:
patent: 2689238 (1954-09-01), Thomas
patent: 2811500 (1957-10-01), Coroier
patent: 2867600 (1959-01-01), Coutras
patent: 2977272 (1961-03-01), Pounds
patent: 3060147 (1962-10-01), Schrecel
patent: 3131088 (1964-04-01), Felstag
patent: 3154454 (1964-10-01), Dupuis
patent: 3509019 (1970-04-01), Beacham

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