Patent ID: 8481634

Claim:
A hot melt desiccant matrix composition comprising as components thereof a mixture of the following ingredients: a. an organic binder Component A, said Component A comprises: i. about 10% to 80% by weight of a metallocene catalyzed polyolefin polymer having a melting point less than 125° C., where said metallocene catalyzed polyolefin polymer in Component A consists of a random copolymer of propylene and ethylene having less than 30% by weight of ethylene, and said random copolymer of propylene and ethylene has a density between 0.85 g/cc to 0.867 g/cc at 20° C. and a melt flow rate between 5 to 200 g/10 min at 230° C.; ii. about 15% to 60% by weight of a plasticizer having a flash point equal to or greater than 200° C.; iii. about 10% to 50% by weight of a compatible non-polar tackifier where said compatible tackifier comprises C5, hydrogenated C5, C9 modified C5 (C5/C9), hydrogenated C5/C9, hydrogenated C9, hydrogenated DCPD and polyterprene resins; and iv. a stabilizer in the amount of about 0% to 5% by weight; and b. 50% by weight to 70% by weight of an adsorbent Component B, said Component B comprised of a water/moisture absorbing material, or a VOC absorbing material, or a blend of water/moisture absorbing material and a VOC absorbing material, and wherein said absorbent Component B is selected from the group of absorbing materials consisting of silica gels, activated carbons, silica alumina, calcium sulfate, calcium oxide, natural zeolites and molecular sieves and mixtures thereof, wherein the ratio of organic binder Component A to absorbent Component B ranges from about 30% by weight to about 80% by weight of Component A, and the total amount Components A and B adding up to 100% by weight; and wherein said composition passes a sag resistance test by exhibiting zero slump at 80° C. and passes a low temperature flexibility test by exhibiting no cracking at both 0° C. and −20° C.