| abstract |
The invention relates to a foamable composition comprising at least one base polymer, at least one propellant, at least one lubricant and/or at least one heat stabilizer, and optionally additional additives, selected from crosslinking agents, heat reflectors, heat flow additives, anti-condensation additives, and/or fillers. Corresponding compositions can be processed into polymer foams which are characterized by a heat conductivity of < 0.04 E/(mK), an expansion greater than or equal to 1000%, and a weldability of 80 seconds at 240-260 °C. Corresponding polymer foams can be advantageously introduced into hollow profiled plastic parts for windows and doors using a coextrusion process and can thus be used to produce door and window frames with low conductivity values. |