Patent ID: 11866622
Assignee: 3M INNOVATIVE PROPERTIES COMPANY
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A flame-retardant pressure-sensitive adhesive, comprising reaction products of the following reaction compositions:
1) 35-99 wt. % of a (meth)acrylate copolymer containing a functional reactive functional group, based a total weight of the reaction compositions as 100 wt. %; the functional reactive functional group comprising one or a plurality of the following groups: carboxyl group, hydroxyl group, and epoxy group; the (meth)acrylate copolymer containing the functional reactive functional group being formed by free radical polymerization of one or a plurality of monomers comprising the following:
a1) 86-99 wt. % of a (meth)alkyl acrylate, based on a total weight of the employed monomers as 100 wt. %, and
a2) 1-14 wt. % of a monomer containing a functional reactive functional group, based on the total weight of the employed monomers as 100 wt. %;

2) 1-65 wt. % of a reactive organophosphorus flame retardant capable of reacting with the functional reactive functional group, based on a total weight of the pressure-sensitive adhesive as 100 wt. %; the molecular weight of the reactive organophosphorus flame retardant being 800-2400; and the reactive organophosphorus flame retardant being formed by reaction of reaction components comprising the following substances:
b1) a compound or oligomer containing n epoxy groups, wherein an epoxy equivalent weight of the compound or oligomer is E, and n>=2, and
b2) 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, the relationship between the weight contents of b1 and b2 being as follows: b2=(216*b1)/(nE(n−1)).