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VINYL CHLORIDE-VINYL ACETATE-VINYL ALCOHOL TERPOLYMER
VCAA RESINS
VCAA RESINS ARE A SERIES OF TERPOLYMERS WITH DIFFERENT MOLECULAR WEIGHT£¬AND PARTIALLY HYDROLYZED VINYL CHLORIDE-VINYL ACETATE RESINS. THEY ARE SUPPLIED AS A WHITE POWDER.
?? THE RESINS CAN BE USED FOR A WIDE RANGE OF COATINGS APPLICATIONS£¬INCLUDING PRINTING INKS£¬WOOD FINISHES£¬PAPER COATINGS£¬METAL DECORATIVE AND CONTAINER COATINGS£¬AND AS BINDER INMAGNETIC TAPE.
?? THE RESINS HAVE MANY ADVANTAGES£¬FOR EXAMPLE£¬CROSSLINKABLE WITH AMINO RESINS OR POLYISOCYANATES£¬COMPATIBILITY WITH MANY GENERIC RESINS INCLUDING ALKYDS£¬URETHANES AND ACRYLICS£¬RESISTANCE TO WATER£¬ALCOHOLS£¬AND ALIPHATIC HYDROCARBONS£¬ADHESION TO VINYL RESIN£¬CELLULOSIC AND TREATED POLYESTER AND PE SUBSTRATES£¬HEAT-SEALABLE£¬TASTELESSAND ODORLESS.
??
TYPICAL PROPERTIES OF VCAA RESINS
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J-03 |
J-02 |
J-01 |
MOLECULAR WERGHT£¬NUMBER AVERAGE |
60000 |
35000 |
28000 |
PLLYMER COMPOSITION%£¬BY WT |
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|
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?????????????? VCI |
90 |
90 |
90 |
VAC |
4 |
4 |
4 |
?????????????? VAI |
6 |
6 |
6 |
REACTIVE FUNCTIONALITY TYPE |
HYDROXYL |
HYDROXYL |
HYDROXYL |
% BY WT |
2.3 |
2.3 |
2.3 |
DENSITY OF THE RESINS£¬G/CM3 |
1.35 |
1.35 |
1.35 |
RELATIVE VISCOSITY |
1.60 |
1.30 |
1.25 |
VOLATILE CONTENT£¬% |
¡´0.5 |
¡´0.5 |
¡´0.5 |
- THESE DATE ARE TYPICAL VAPICAL VALUES AND CANNOT BE CONSTRUED AS SPECIFICATIONS.
???? VCAA COATINGS BASED ON THESE RESINS ARE NON-OXIDIZING AND PERMANENTLY FLEXIBLE£¬AND ARE CHARACTERIZED BY THE ABSENCE OF COLOR£¬ODOR£¬AND TASTE. THEY ARE NOT ATTACKED AT NORMAL TEMPERATURE BY DILUTE ALKALIES OR MINERAL ACIDS£¬ALCOHOLS£¬GREASES£¬OILS OR ALIPHATIC HYDROCARBONS.THEY HAVE A LOW MOISTURE-VAPOR TRANSMISSION RATE£¬ LOWORDER OF WATER ABSORPTION£¬AND ARE TOUGH AND DURABLE.
???? THE MOLECULAR WEIGHT OF VCAA AFFECTS THE SOLUBILITY AND OTHER PHYSICAL PROPERTIES OF THE RESINS¡£AS THE MOLECULAR WEIGHT IS INCREASED£¬THE SOLUTION VISCOSITY INCREASES AND THE STRENGTH OF THE FILM INCREASES¡£THESE RESINS CAN BE DISSOLVED IN RELATIVELY STRONG SOLVENT AND DILUENT COMBINATIONS£¬SUCH AS 50 PERCENT KETONE AND 50 PERCENT AROMATIC HYDROCARBON£¬TO PRODUCE RESIN SOLUTIONS OF 20 PERCENT SOLIDS.
?? VCAA RESINS HAVE GOOD COMPATIBILITY WITH OTHER FILM-FORMING RESINS£¬SUCH AS ALKYDS£¬URETHANE ELATOMERS£¬ISOCYANATE RESINS£¬EPOXY POLYMERS£¬AND UREA AND MELAMINE RESINS.THEREFORE,THE VCAA RESINS ARE OFTEN FORMULATED WITH MANY FILM-FORMING MATERIALS TO IMPROVE COATING PROPERITIES,SUCH AS ADHESION,FLEXIBILITY,TOUGHNESS,HARDNESS,AND CHEMICAL RESISTANCE.
??? THE HYDROXYL FUNCTIONALITY OF VCAA RESINS PERMITS CROSSLINKING REACTIONS WITH AMINO RESINS OR ISOCYANATE PREPOLYMER TO INCREASE COATING HARDNESS AND RESISTANCE TO SOLVENTS,CHEMICALS,AND MOSITURE.THEY ALSO PERMIT THE ADDITIONS OF APLASTICIZER AND A LIHGT STABILIZER TO ENHANCE FLEXIBILITY AND LIGHT STABILITY.
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