| 摘要 |
An improvement is provided in a particulate adhesive for bonding lignocellulosic materials. Such lignocellulose materials include core particles and isocyanate coatings thereon. The improvement includes providing the particulate adhesive as a confricated mixture of the core particles and the isocyanate in a ratio range of the isocyanate to the core particles of 1:5 to 2:1. The core particles are selected to comprise crude cellulosic polysaccharide particles having activated -OH group-containing surfaces and a maximum particle diameter of 150 .mu.m. The isocyanate coatings are reacted with the -OH groups on the activated surfaces of the core particles. The isocyanate coatings on the core particles have a thickness of 1 to 13 .mu.m. |
