Binder

Details Binder Binder

1981-08-20

1982-11-02

Nielsen, Earl A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From lignin, tannin, or derivative reactant

106123R, 106123LC, 260124R, 527400, 524 72, 524 74, C08L 9700

Patent

active

043574548

ABSTRACT:
A lignin product-containing binder and a process for its production are described.
The lignin product consists of chlorolignin which has been treated with strong alkali (NaOH) for preferably 0.5-3 h. at 50.degree.-100.degree. C. and a pH of 10-13.5. The alkali-treated chlorolignin product can be used on its own as a binder component or, preferably, together with phenol-formaldehyde. The weight ratio phenol/lignin product is suitably from 4:1 to 1:4.

REFERENCES:
patent: 2282518 (1942-05-01), Hochwalt et al.
patent: 2878197 (1959-03-01), Baxter et al.
patent: 3931072 (1976-01-01), Coyle
patent: 4130515 (1978-12-01), Bornstein

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