Rezumat
The phenomenological equation of balance which describes change in space and time of concentra- tion of carriers of a charge created in polyvinylchlorid (PVC) and poly(vinyl butyral) (PVB) under action β-–radiations is offered. The algorithm asymptotic approximation of the decision of the given equation pre- sence of action of an external electric field and reactions recombination i-carriers of a charge is created. Re- sults of researches are resulted.