Patent ID: 8475927

Claim:
An interlayer film for heat shield laminated glass, which is formed by using a resin composition of a mixture of a dispersion of tin-doped indium oxide fine particles and a polyvinyl acetal resin, wherein the dispersion of tin-doped indium oxide fine particles comprises (1) tin-doped indium oxide fine particles having a primary average particle size of 0.2 μm or less, (2) a plasticizer for an interlayer film, (3) an organic solvent containing at least one alcohol as a main component, and (4) a dispersion stabilizer, a content of the dispersion stabilizer is from 6% to 20.7% by weight based on a total weight of the dispersion, the dispersion stabilizer comprises (i) a chelate at a content in a range of 3.3 to 30 parts by weight per 100 parts by weight of the tin-doped indium oxide fine particles, (ii) an organic acid at a content in a range of 6.0 to 20.3 parts by weight per 100 parts by weight of the tin-doped indium oxide fine particles, and (iii) a phosphate ester-based compound at a content in a range of 6.7 to 16.7 parts by weight per 100 parts by weight of the tin-doped indium oxide fine particles, a content of the tin-doped indium oxide fine particles is from 10% to 60% by weight based on the total weight of the dispersion, a content of the alcohol is from 4% to 13.8% by weight based on the total weight of the dispersion, and a content of the plasticizer is from 10% to 80% by weight based on the total weight of the dispersion.