Patent ID: 6255033
Filing Date: 2001-07-03
Classification: B41C,C08F,H05K,Y10S

Abstract:
A positive-acting thermal resist element comprising a metal substrate having adhered to at least one surface of the substrate a positive-acting thermal resist layer comprising an acetal polymer comprising the general formula: ##STR11##whereinR.sub.1 is --C.sub.n H.sub.2n+1 where n=1-12; R.sub.2 is ##STR12##wherein R.sub.4 =--OH; R.sub.5 =--OH or --OCH.sub.3 or Br-- or --O--CH.sub.2 --C.ident.CH; and R.sub.6 =Br-- or NO.sub.2 ##STR13##where R.sub.7 =COOH, --(CH.sub.2).sub.a COOH, --O--(CH.sub.2).sub.a COOH andm=5-40 mole %,n=10-60 mole %,o=0-20 mole %,p=1-10 mole %, andq=5-50 mole %; andan infrared absorbing material in an amount of from 0.01 to 20% by weight of said positive-acting thermal resist layer.