초록 ▼

Novel modifying agents contain a sharply-melting crystalline polymer ingredient, preferably a side chain crystalline (SCC) ingredient, and an active chemical ingredient. Such modifying agents, especially when in the form of particles, can be placed in contact with a matrix, will not modify the mix b

Novel modifying agents contain a sharply-melting crystalline polymer ingredient, preferably a side chain crystalline (SCC) ingredient, and an active chemical ingredient. Such modifying agents, especially when in the form of particles, can be placed in contact with a matrix, will not modify the mix below the crystalline melting point T.sub.p, but will rapidly modify the matrix above T.sub.p. The active chemical ingredient can react with the matrix, catalyze a reaction of the matrix, or inhibit a reaction of the matrix. Particularly useful compositions are polymer precursors which are storage-stable at low temperatures but which are rapidly converted to crosslinked resins when heated to temperatures above T.sub.p, optionally in the presence of light.

대표청구항 ▼

[ What is claimed is:] [1.]1. A composition which comprises(1) a matrix material which comprises precursors for a crosslinked thermoset polyester resin; and(2) a modifying agent which(a) comprises(i) a polymeric moiety which has a heat of fusion, as measured by a differential scanning calorimeter (D

[ What is claimed is:] [1.]1. A composition which comprises(1) a matrix material which comprises precursors for a crosslinked thermoset polyester resin; and(2) a modifying agent which(a) comprises(i) a polymeric moiety which has a heat of fusion, as measured by a differential scanning calorimeter (DSC), of at least 20 J/g and which comprises a side chain crystalline polymeric moiety having an onset of melting temperature T.sub.o and a peak melting temperature T.sub.p such that T.sub.p -T.sub.o is less than T.sub.p.sup.0.7 and less than 10.degree. C., and(ii) a catalytic moiety which is bonded to the polymeric moiety through a bond having a strength of at least 10 Kcal/mole, and which, when in contact with the matrix material at an elevated temperature, catalyzes chemical reaction of the matrix material to form the thermoset resin, and(b) is in the form of solid particles which are distributed in the matrix material, which have an average particle size of less than 150 microns, and which, when heated above T.sub.p, undergo a physical change which (i) substantially increases the extent to which the matrix material is contacted by the catalytic moiety and (i) causes the chemical reaction of the matrix material to form the thermoset resin.