Initiator systems, polymerisable compositions, and uses...

Details Initiator systems, polymerisable compositions, and uses... Initiator systems, polymerisable compositions, and uses...

2005-09-06

2005-09-06

Zalukaeva, Tatyana (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S317100, C526S198000, C526S319000, C428S500000, C106S018130, C156S333000

Reexamination Certificate

active

06939932

ABSTRACT:
Use of an initiator system comprising:a combination of an organoborane and a polyaziridine, in a ratio ofaziridine groups to boron atoms of greater than 1.3:1,as an initiator of polymerisation in an adhesive composition for bonding a low surface energy substrate;provided that the initiator system does not contain more than a trace amount of a complex of organoborane with a complexing agent selected from:an amine other than a polyaziridine;a complexing agent comprising at least one hydroxide;a complexing agent comprising at least one alkoxide; oramidine complexing agent.An initiator system as described is of the formula VI:wherein R1is C1-C10alkyl,R2and R3, which may be the same or different, are, 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;R5is a polyvalent radical,R6and R7which may be the same or different are H or C1-C10alkyl, particularly C1-4alkyl, especially methyl, andy is a number of at least 2, particularly 2-4, especially 3, and the value of x multiplied by y is greater than 1.3.Particular examples of initiator compounds include, trimethylol propane tris(3-(2-methyl aziridino))propionate and trimethylol propane tris-3-N-aziridinyl propionate.

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