Polymer resin composition
The invention provides a polymeric composition comprising: a) at least one resin selected from the group consisting of vinyl ester resins, unsaturated polyester resins, acrylates and methacrylates, b) at least one copolymer having resin-reactive groups and a glass transition temperature T g of −20° C. or less, c) nanoparticles having an average particle size d max as measured by means of small-angle neutron scattering (SANS) of 5 to 150 nm. The compilation according to the invention allows the production of composite materials, coatings, casting compositions, adhesives, and dental materials which have enhanced mechanical properties, particularly enhanced impact strength.
1 . A polymeric composition comprising:
a) at least one resin selected from the group consisting of vinyl ester resins, unsaturated polyester resins, acrylates and methacrylates,
b) at least one copolymer having resin-reactive groups and a glass transition temperature T g of −20° C. or less,
c) nanoparticles having an average particle size d max as measured by means of small-angle neutron scattering (SANS) of 0.5 to 150 nm.
2 . The composition of claim 1 , characterized in that
the glass transition temperature T g of the copolymer is −20 to −100° C., preferably −30 to −100° C., more preferably −40 to −100° C., more preferably −50 to −100° C., more preferably −60 to −100° C.
3 . The composition of claim 1 or 2 , characterized in that the fraction of the copolymer in the composition is 2% to 30% by weight, preferably 4% to 18% by weight, more preferably 6%-12% by weight.
4 . The composition of any one of claims 1 to 3 , characterized in that the copolymer in the cured composition forms rubber domains having an average size of 0.05 to 20 μm, preferably 0.1 to 10 μm, more preferably 0.2 to 4 μm.
5 . The composition of any one of claims 1 to 4 , characterized in that the copolymer is a carboxy-terminated butadiene-acrylonitrile (CTBN) or a CTBN derivative.
6 . The composition of claim 5 , characterized in that the CTBN derivatives are selected from the group consisting of epoxy-terminated and vinyl-terminated CTBN derivatives.
7 . The composition of any one of claims 1 to 6 , characterized in that the nanoparticles are selected from the group consisting of silicon dioxides, carbonates and montmorillonite.
8 . The composition of any one of claims 1 to 7 , characterized in that the average particle size d max of the nanoparticles is between 6 and 100 nm, preferably 6 and 40 nm, more preferably 8 and 30 nm, more preferably 10 and 25 nm.
9 . The composition of any one of claims 1 to 8 , characterized in that the maximum width at half peak height of the distribution curve of the particle size of the nanoparticles is not more than 1.5 d max , preferably not more than 1.2 d max , more preferably not more than 0.75 d max .
10 . The composition of any one of claims 1 to 9 , characterized in that the nanoparticles have a monomodal or multimodal distribution curve.
11 . The composition of claim 10 , characterized in that the distribution curve is monomodal, bimodal or trimodal.
12 . A composite material characterized in that it comprises a polymeric composition of any one of claims 1 to 11 .
13 . The composite material of claim 12 , characterized in that the fraction of the nanoparticles in the polymeric composition is 3% to 20% by weight, preferably 6% to 10% by weight.
14 . A coating characterized in that it comprises a polymeric composition of any one of claims 1 to 11 .
15 . The coating of claim 14 , characterized in that the fraction of the nanoparticles in the polymeric composition is 10% to 50% by weight, preferably 20% to 50% by weight.
16 . A casting compound characterized in that it comprises a polymeric composition of any one of claims 1 to 11 .
17 . The casting composition of claim 16 , characterized in that the fraction of the nanoparticles in the polymeric composition is 10% to 50% by weight, preferably 20% to 50% by weight.
18 . The use of a polymeric composition of any one of claims 1 to 11 for producing a product selected from the group consisting of composite materials, coatings, casting compositions, adhesives, and dental materials.