Composite board including core and capstock, and associated method
A composite board, including a core, and a capstock positioned to at least partially cover the core, where the capstock includes 10 wt. % to 70 wt. % of polyvinyl chloride (PVC), based on a total weight of the capstock, 1 wt. % to 60 wt. % of acrylonitrile-styrene-acrylate (ASA), based on the total weight of the capstock, 1 wt. % to 60 wt. % of styrene-acrylonitrile (SAN), based on the total weight of the capstock, and 1 wt. % to 60 wt. % of a thermoplastic elastomer, where the thermoplastic elastomer includes styrene-isobutylene-styrene (SIBS), a thermoplastic copolyester elastomer, a polymeric plasticizer, and combinations thereof, wherein the capstock does not include thermoplastic polyurethane.
1. A composite board, comprising:
a core; and
a capstock positioned to at least partially cover the core,
wherein the capstock consists of, based on a total weight of the capstock:
30 wt. % to 45 wt. % of polyvinyl chloride (PVC);
20 wt. % to 30 wt. % of acrylonitrile-styrene-acrylate (ASA);
15 wt. % to 20 wt. % of styrene-acrylonitrile (SAN); and
10 wt. % to 25 wt. % of a polymeric plasticizer,
wherein the polymeric plasticizer consists of a ketone ethylene ester terpolymer.
2. The composite board of claim 1 , wherein the capstock contains:
35 wt. % to 45 wt. % of PVC.
3. A composite board, comprising:
a core; and
a capstock positioned to at least partially cover the core,
wherein the capstock consists of, based on a total weight of the capstock:
30 wt. % to 50 wt. % of polyvinyl chloride (PVC);
20 wt. % to 40 wt. % of acrylonitrile-styrene-acrylate (ASA);
10 wt. % to 30 wt. % of styrene-acrylonitrile (SAN); and
5 wt. % to 30 wt. % of a polymeric plasticizer,
wherein the polymeric plasticizer consists of a ketone ethylene ester terpolymer.