Resins based on novolaks, their production and their use as tack

Details Resins based on novolaks, their production and their use as tack Resins based on novolaks, their production and their use as tack

1978-10-10

1981-04-07

Briggs, Sr., Wilbert J.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525135, 525137, 525139, 525140, 260 3, C08G 828, C08L 6114

Patent

active

042607043

ABSTRACT:
Resins having a softening point of from 50.degree. to 130.degree. C., an OH-number of from 250 to 400 and an iodine number of from 90 to 160, obtainable by reacting an alkyl phenol-formaldehyde novolak or an alkyl phenol mixture-formaldehyde novolak under acid-catalysed conditions with a polunuclear phenol or polynuclear phenol mixture and formaldehyde and/or an aliphatic aldehyde or aliphatic aldehyde mixture, the ratio by weight of the alkyl phenol or alkyl phenol mixture to the polynuclear phenol or polynyclear phenol mixture being from 2.2:1 to 1:10.

REFERENCES:
patent: 3650102 (1972-03-01), Economy et al.
patent: 3988386 (1976-10-01), Hess et al.
patent: 4020035 (1977-04-01), Edwards et al.

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