James R Harlan

US Patent:

39843696, Oct 5, 1976

Filed:

May 15, 1975

Appl. No.:

5/577578

Inventors:

James T. Harlan - Torrance CA
David J. St. Clair - Torrance CA

Assignee:

Shell Oil Company - Houston TX

International Classification:

C08K 501
C08K 507
C08K 511

US Classification:

260 336AQ

Abstract:

Sealant compositions exhibiting good substrate/sealant adhesion comprise 3 to 30 percent by weight of a block copolymer, 2 to 40 percent by weight butyl rubber, 10 to 70 percent by weight of a plasticizing oil having a solubility parameter ranging from 6 to 8, about 1 to about 50 percent by weight of an adhesion promoting resin having a solubility parameter ranging from about 8 to about 12, about 1 to about 70 percent by weight of an inorganic filler and about 0. 01 to about 2. 0 percent by weight of a UV/oxidation stabilizer or a mixture of UV/oxidation stabilizers.

US Patent:

39923398, Nov 16, 1976

Filed:

May 15, 1975

Appl. No.:

5/577579

Inventors:

James T. Harlan - Torrance CA
David J. St. Clair - Torrance CA

Assignee:

Shell Oil Company - Houston TX

International Classification:

C08K 501
C08K 507
C08L 9300

US Classification:

260 27BB

Abstract:

A primer for block copolymer based sealants comprises a solution of the block copolymer, an adhesion promoting resin compatible in the higher softening point block of the block copolymer, a silane and oxidation/UV stabilizers. A process for applying a block copolymer based sealant comprises coating a substrate with a thin layer of a solution of block copolymer, an adhesion promoting resin associating with the block having the highest softening point, a silane and oxidation/UV stabilizers in a solvent, evaporating the solvent and applying a layer of block copolymer sealant over the residue left after evaporating the solvent.