Abstract: This invention relates to a highly stable, dense interpenetrated crosslinked polymer network (ICPN) containing (a) a crosslinked, network-forming primary polymer containing vinyl lactam and/or acrylic acid moieties, and (b) a secondary, optionally crosslinked, distinctly different polymer interpenetrated into the network of (a) and derived from a monomer selected from the group consisting of an acrylate and/or acrylamide monomer. The invention also relates to the oil-suspension, sequential polymerization of (a) and (b) for producing the above described interpenetrated polymeric network.

Abstract: An adhesive composition for roofing such as shingles is disclosed which is composed of a hard asphaltic bitumen fraction having a penetration number at 77.degree. F. of from 0 to 30 dmm and a softening point of from about 150.degree. to 220.degree. F. and an elastomeric composition composed of a thermoplastic elastomer and a plasticizer wherein the overall adhesive composition has a penetration number of from 30 to 100 dmm at 130.degree. F. and a softening point of 140.degree. to 230.degree. F. The inventive composition is self-sealing and exhibits excellent squash resistance, low temperature properties and resistance to blowoff. The composition can be used with shingles as well as other types of roofing coverings.