| 摘要 |
Shaped elastic masses, suitable as floor and wall coverings and as linings or coatings for wood, metal and stone, are made by shaping hardened urea and thio-urea formaldehyde resins, having a cellular foam-like structure, in a comminuted state, in admixture with binding agents having elastic and sticking properties. Specified binding agents are linoxyn, natural rubber, artificial rubbers such as polymerization products of butadiene or of mixtures of butadiene and acrylic nitrile or styrene, hydrogenated rubber, polymerized isobutylene, polymerized vinyl isobutyl ether, polymerized vinyl ethers or esters and polymerized acrylic esters, and softening agents may be present. Dyestuffs, fillers, and natural or synthetic resins may be added, and colophony, colcothar, zinc oxide, sulphur, vulcanization accelerators, and the condensation product from aldol and alpha-naphthylamine are specified in examples. The resulting masses may be drawn out into plates or injected into moulds. When rubber is used as the binding agent, the masses may be vulcanized. Specification 446,442 is referred to. |
