POLYURETHANE BOTTOM LAYER WITH LOW EMANATION LEVEL, PULVERIZABLE SYSTEM BASED ON POLYURETHANE FOR CREATION OF SUCH BOTTOM LAYER AND APPLICATION OF SUCH BOTTOM LAYER Russian patent published in 2012 - IPC C08G18/10 C08G18/22 C08G18/50 C08G18/66 B29C41/08 

FIELD: industrial chemistry.

SUBSTANCE: present invention refers to a pulverizable system based on polyurethane that is applicable for production of the bottom layer for polyurethane formed parts that contains a polyol component (A) and an isocyanate component (B) and does not contain amine catalysts. The polyol component (A) contains: (a1) at least one compound that goes into reaction with isocyanate, (a2) at least one agent that is able to prolong the reactive chain with at least two groups that are able to go into reaction with isocyanate; at least one group that is able to go into reaction with isocyanate is represented by a free primary group NH₂-, and (a3) at least one metallic catalyst and (a4) if necessary, other additives. The invention also refers to the way of production of the polyurethane bottom layer for formed parts, to the bottom layer that is manufactured in such a way and to application of this bottom layer in production of seats, control panel, remote controls, pockets and boxes or parts of the internal or external automobile siding.

EFFECT: production of the bottom layer for formed parts from the polyurethane-based pulverizable system that is characterized by low emanation of low-boiling components and condensing components, improved mechanical properties, in particular by breaking strength rupture limit, extensibility and breaking strength tearing limit as well as a small amount of time necessary for extraction from the mould if compared with the residency in an opened position.

20 cl, 4 tbl