The present invention provides a low viscosity block copolymer for non-wovens construction adhesives of the formula [A-(A/B)]nX, wherein A represents an aromatic vinyl compound and (A/B) represents a polymer block obtained by random copolymerization of a mixture of a aromatic vinyl compound and butadiene in a weight ratio in the range of from 2:98 to 30:70, wherein n is an integer in the range of from 1 to 5, and wherein X is the remainder of the coupling agent.本發明提供一種用於非織物結構黏著劑之式[A-(A/B)]nX之低黏度嵌段共聚物,其中A表示芳族乙烯基化合物且(A/B)表示藉由芳族乙烯基化合物與丁二烯之2:98至30:70重量比混合物的無規共聚合獲得之聚合物嵌段,其中n係1至5範圍內之整數,且其中X係偶聯劑之殘餘部分。(無元件符號說明)
