PROBLEM TO BE SOLVED: To provide a spreader for water-surface floating agrochemical compositions that gives a prepared water-surface floating agrochemical composition excellent spreadability, and can stably hold the agrochemical active ingredients of the prepared water-surface floating agrochemical composition, and a water-surface floating agrochemical composition having such properties.SOLUTION: As a spreader for water-surface floating agrochemical compositions, used is an ester compound represented by the following formula 1. (In the formula 1, R1: a C6-9 linear alkyl group or a C6-9 branched alkyl group, AO: a C2 oxyalkylene group, n: an integer of 3-4, R2: a C1-2 linear alkyl group).SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】調製した水面浮遊型農薬組成物に優れた拡展性を付与し、且つ調製した水面浮遊型農薬組成物の農薬有効成分を安定に保持することができる水面浮遊型農薬組成物用拡展剤、及びかかる特性を有する水面浮遊型農薬組成物を提供する。【解決手段】水面浮遊型農薬組成物用拡展剤として、下記の化1で示されるエステル化合物を用いた。(化1)(化1において、R1:炭素数6~9の直鎖のアルキル基又は炭素数6~9の分岐のアルキル基、AO:炭素数2のオキシアルキレン基、n:3~4の整数、R2:炭素数1~2の直鎖のアルキル基。)【選択図】なし
