POLYMER COMPOSITION BASED ON MOISTURE-CURABLE URETHANE SILOXANE RUBBER Russian patent published in 2013 - IPC C08L75/04 C08L83/04 C08K3/26 C08K5/09 C08K5/17 C08K5/54 C09K3/10 

FIELD: chemistry.

SUBSTANCE: invention relates to production of polymer composite materials - sealants, adhesive sealants and coatings based on moisture-curable urethane siloxane liquid rubber and can be used in car and transport engineering, shipbuilding, refrigeration engineering and in the construction industry. The polymer composition consists of the following, wt %: urethane siloxane liquid rubber - 10-25, plasticiser - 10-25, calcium carbonate filler - 40-65, titanium dioxide and/or zinc oxide - 0-5, antioxidant - 0.2-0.8, thixotropic agent - 0-5, drying agent - 0.5-0.8. Calcium carbonate is selected from a group of fractions with a different degree of dispersion or combinations thereof, wherein the combination of each fraction according to particle size is at least 4-10 times greater or less than the previous or next on dispersion. The curing agent used in the composition is in form of tertiary amines selected from trialkylamine, dialkylarylamine and/or diazobicycloalkane. The adhesion promoter is an organo-functional alkoxy silane with primary and/or secondary amine groups. In another version, the composition contains a curing agent in form of tin dibutyl dilaurate and an adhesion promoter with a balanced ratio thereof.

EFFECT: invention improves technological parameters, operational characteristics of the composition, provides reliable adhesion to different materials and enables wide range control of the curing time of the composition while saving raw materials and other materials.

5 cl, 2 tbl