Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1982-09-29
1984-07-24
Schain, Howard E.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524261, 524426, 524430, 524432, 524433, 524439, 524442, 524443, 524509, 524510, 524511, 524596, 528155, C08L 904, C08L 1902, C08L 2102, C08G 822
Patent
active
044618590
ABSTRACT:
A method of preparing a thermoplastic, water-soluble, phenolic aldehyde resin and the composition are provided to enhance the flexibility and resistance to compression fatigue breakage of glass fibers to which the resin has been applied. The method involves two steps. In the first step, the phenolic compound and the aldehyde are reacted to less than 100 percent completion in an amount so that the aldehyde to phenolic compound ratio is in the range of about 0.6 to about 1.5 and at an acidic pH and for a period of time equivalent to about 3 hours to about 10 hours when the temperature is in the range of about 55.degree. F. (13.degree. C.) to about 90.degree. F. (32.degree. C.) to produce a resinous mixture. In the second stage the pH of the reaction is adjusted within the range above about 7.0 to about 7.5 and the reaction is continued between the unreacted phenolic compound and aldehyde and resinous mixture to produce a resinous mixture composition that is thermoplastic, and water soluble and has trimer polymer with slight cross-linking and dimer and no higher oligomer polymers.
The phenolic aldehyde resin mixture is processed into an adhesive system by combining it with one or more elastomeric latex and various latex additives. The adhesive system is aged and has added to it an amine or ammonia to tie up any unreacted aldehyde. Also additional phenolic compound may be added. The adhesive system is used to coat filamentary materials and the coated filamentary materials are dried to produce reinforcement material for rubber.
REFERENCES:
patent: 4246144 (1981-01-01), Girgis
patent: 4314050 (1982-02-01), Girgis
PPG Industries Inc.
Schain Howard E.
Stachel Kenneth J.
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