Blends of polyolefin graft polymers and ASA polymers

DETAILED DESCRIPTION OF THE INVENTION AND THE PREFERRED EMBODIMENTS THEREOF Proportions of the ASA polymer in a binary blend with the polyolefin graft polymer, can range typically from less than about 1 percent to more than about 99 weight percent of ASA polymer (with the balance being the graft polymer component).
It is preferred to provide blends which contain about 5 percent up to about 80 percent of the polyolefin graft polymer to achieve the desired enhanced properties.
Preferred blends of this aspect of the invention contain about from about 5 percent to about 50 percent of the graft polymer component and from about 50 percent to about 95 percent of the ASA polymer component, said percentages being based on the weight of the blend of the graft polymer and the ASA polymer.
With respect to the aspect of the invention involving not only the graft polymer components and the ASA polymer component, but also an auxiliary polymer comprising a polymer or copolymer of an ethylenically unsaturated polymerizable monomer, the proportions of components are in the following ranges.
The ASA polymer component is generally present in a proportion of about 20 percent to about 80 percent of the total polymer components, with the remainder being the polyolefin graft copolymer and the auxiliary polymer component.
The latter two components are generally present in the proportion of about 10 parts polyolefin graft polymer to 90 parts auxiliary polymer to about 90 parts polyolefin graft polymer to 10 parts auxiliary polymer.
The range is preferably from about 20 parts polyolefin graft polymer to 80 parts auxiliary polymer to 40 parts auxiliary polymer to about 30 parts polyolefin graft polymer to 60 parts auxiliary polymer.
All parts and percentages are by weight.
THE POLYOLEFIN GRAFT POLYMER COMPONENT The component of the polymer blends of the invention is a graft polymer of an ethylenically unsaturated polymerizable monomer and a polymer of an olefin of 2 to about 8 carbon atoms, wherein the olefin polymer is substantially insoluble in the monomer but is capable of absorbing the monomer