Phenolic aldehyde colophony is the synthetic resin of the earliest industrialization, it has certain weak point. To overcome the limitation with phenolic aldehyde inherent colophony, improve performance of phenolic aldehyde resinous further, satisfy the need that new and high technology admits, people had much research to phenolic aldehyde colophony, improve tenacity of phenolic aldehyde resinous, increase the mechanical function and heat-resisting function, focal point that improves technical properties to make research. In recent years home develops colophony of a series of new-style phenolic aldehyde in succession, using resin of phenolic aldehyde of synthetic resin modified is his main way way. Basically have a few kinds of colophony to be able to be used at modified of phenolic aldehyde colophony, had special subject introduction to this a few days ago, basically include polyvinyl alcohol to shrink aldehyde colophony, polyamide colophony, epoxy resin 3 kinds.
What apply at most on industry is to use polyvinyl alcohol to shrink colophony of aldehyde modified phenolic aldehyde, it can raise colophony the felt force to fibre glass, improve brittleness of phenolic aldehyde resinous, increase the mechanical strength of composite material, reduce solidify rate to be helpful for reducing thereby shape pressure. Use as the phenolic aldehyde colophony of modified is normally use ammonia water or magnesian make resin of formaldehyde of activator complex phenol. Use as the polyvinyl alcohol of modified shrinks aldehyde is general to shrink fourth aldehyde is mixed shrink armour aldehyde. When using general its dissolve at alcohol, regard resinous as solvent. Use shrink aldehyde and phenolic aldehyde hydroxide are methylic reaction complex colophony is colophony of a kind of admirable carrier of special type printing ink. Colophony of polyamide modified phenolic aldehyde also is taken seriously, the phenolic aldehyde colophony of classics polyamide modified raised phenolic aldehyde resinous to pound tenacity and caking property. Use as the polyamide of modified is a kind of hydroxide methylic change polyamide, use hydroxide to methylic or lively hydrogen is in synthetic resin process or achieve the goal of modified in colophony solidify process, the thin wall canal such as the fishing rod that makes with this colophony has good mechanical performance.
The composite material that mixture of colophony of phenolic aldehyde of sex of the solid that use heat and double phenolic A epoxy resin makes, can hold an advantage of these two kinds of resinous concurrently, improve the their respective defect, goal that achieves modified thereby. This kind of mixture has the caking property with admirable epoxy resin, improved brittleness of phenolic aldehyde resinous, have the hear resistance with phenolic aldehyde admirable colophony at the same time, improved the defect with epoxy resin poorer hear resistance. This kind of modified is the hydroxide in passing phenolic aldehyde colophony methylic with the hydroxyl in epoxy resin and annulus oxygen radical has chemical reaction, and oxygen radical has the link in the phenolic hydroxyl in phenolic aldehyde colophony and epoxy resin chemical reaction, final cross-linking achieves a goal into complex bodily form structure, it is the phenolic aldehyde with a kind of the widest application adds method of pliable but strong. In recent years as increase of demand ceaselessly to phenolic aldehyde colophony, the investment on research and development increases ceaselessly, new colophony breed, new shape craft, new synthesis technology appears ceaselessly, colophony of phenolic aldehyde of epoxy resin modified reachs its composite material, its bigger effect will be produced in a lot of domains.
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