Adhesive and resulting nonwoven fabric

Details Adhesive and resulting nonwoven fabric Adhesive and resulting nonwoven fabric

1982-01-19

1983-04-26

Welsh, Maurice J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428290, 428360, 428361, 4284231, 4284237, 528 52, 528 57, 528 59, 528 60, 528 76, 528 77, C08G 1832

Patent

active

043813321

ABSTRACT:
A prepolymer having a molecular weight of at least 3,000 is made from a polyether polyol where all the OH groups are capped with an aliphatic polyisocyanate. When mixed with water the prepolymer reacts to form an elastomeric cross-linked polyurethane gel adhesive which can be used to adhere fibers to from a nonwoven fabric. Examples of the aliphatic diisocyanate are IPDI (isophorone diisocyanate) and hydrogenated MDI. A catalyst can also be applied to the aqueous mixture to accelerate the adhesive binder formation.

REFERENCES:
patent: 2948691 (1960-08-01), Windemuth et al.
patent: 3719050 (1973-03-01), Asao et al.
patent: 4118354 (1978-10-01), Harada et al.
patent: 4246146 (1981-01-01), Wood et al.

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