Metal alkyl borphydride polymerisation initiators,...

Details Metal alkyl borphydride polymerisation initiators,... Metal alkyl borphydride polymerisation initiators,...

2005-01-18

2005-01-18

Tarazano, D. Lawrence (Department: 1773)

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

C428S520000, C156S331100, C526S178000, C526S196000, C526S201000, C526S217000

Reexamination Certificate

active

06844080

ABSTRACT:
Metal alkyl borohydrides are used as initiators of polymerisation, particularly in adhesive compositions for bonding a wide range of substrates including low surface energy substrates such as polyolefins. As described, the metal alkyl borohydrides are of the formula I or II.whereinR1is C1-C10alkyl,R2and R3, which may be the same or different, are H, D, C1-C10alkyl or C3-C10cycloalkyl, phenyl, or phenyl-substituted C1-C10alkyl or C3-C10cycloalkyl, provided that any two of R1-R3may optionally be part of a carbocyclic ring, andM+is a metal ion.In particular, alkali metal trialkyl borohydrides are used, the alkali metal salt being selected from: Lithium triethylborohydride, Sodium triethylborohydride, Potassium triethylborohydride, Lithium tri-sec-butylborohydride, Sodium tri-sec-butylborohydride, Potassium tri-sec-butylborohydride, and Lithium triethylborodeuteride. Other exemplified compounds which are less effective on low surface energy substrates include Lithium 9-borabicyclo [3.3.1]-nonane (9BBN) hydride, Lithium thexylborohydride, Lithium trisiamylborohydride and Potassium trisiamylborohydride.

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