WATER FREE OR LOW WATER, PARTIALLY CRYSTALLINE, SOLID AT ROOM TEMPERATURE GLUE (VERSIONS) Russian patent published in 2002 - IPC

FIELD: gluing substances. SUBSTANCE: invention describes water free or low, partially crystalline, solid at the room temperature glue consisting of 25-100 wt.% of binding agent providing form of substance and comprising polymers carrying ester groups and 0-75 wt.% of additional agents and glue has: (a) crystallization degree determining by differential scanning calometric measurement in the range from minus 40 C to plus 120 C with corresponding melting enthalpy value 10-150 mJ/mg; (b) at least one crystallization point determining by differential scanning calometric measurement and equal to 20-110 C and also (c) crystallization rate from some seconds to some days determining by visual observation in polarization microscope. Variant of proposed glue involves that a binding agent is polyurethane or a mixture of polyurethanes. Glue is used preferable as a pencil and has to be useful for paper gluing being substrates can be easily detached if necessary. EFFECT: improved properties of glue. 2 cl, 2 tbl, 3 ex