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Title:
CURABLE COMPOSITION FOR SILICONE PRESSURE SENSITIVE ADHESIVES
Document Type and Number:
WIPO Patent Application WO/2023/184222
Kind Code:
A1
Abstract:
A curable composition contains: (A) a polydiorganosiloxane component including: (A1) greater than 3.1 wt% to 20 wt% of an aliphatically unsaturated polydiorganosiloxane polymer and (A3) a hydroxyl-terminated polydiorganosiloxane gum of unit formula (A-III); (B) a polyorganosilicate resin component including (B1) a capped resin, (B2) >18.53 wt% to 54.3 wt% of an uncapped resin; where the weight ratio of the uncapped resin (B2) to the capped resin (B1) is greater than 0.51 to 58.82; where component (A) and component (B) are present in amounts to provide a weight ratio of (B) : (A) of 1.2: 1 to less than 1.62: 1; (C) a polyorganohydrogensiloxane that is present in an amount to provide a molar ratio of silicon bonded hydrogen atoms to alkenyl groups for the curable composition of 5 to 50; (D) a hydrosilylation reaction catalyst in an amount sufficient to provide 1 to 1000 ppm of platinum group metal; and (E) a condensation reaction catalyst; where the content of alkenyl groups in the curable composition is 0.017 wt% to 0.089 wt %; and where wt% values are relative to the total weight of components (A), (B), (C), (D) and (E) unless otherwise stated.

Inventors:
CAO QING (CN)
ZHANG SHENGLAN (CN)
MA CHAO (CN)
Application Number:
PCT/CN2022/084013
Publication Date:
October 05, 2023
Filing Date:
March 30, 2022
Export Citation:
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Assignee:
DOW SILICONES CORP (US)
CAO QING (CN)
ZHANG SHENGLAN (CN)
MA CHAO (CN)
International Classes:
C09J183/04
Foreign References:
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EP0556023A11993-08-18
Attorney, Agent or Firm:
KING & WOOD MALLESONS (CN)
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