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Photosensitive silicone material due to its excellent performance, and occupies a very important position in the photosensitive polymer materials. Hyperbranched polymer is a low viscosity, high reactivity, and has become widely accepted. The alkali soluble prepolymer development is environmentally friendly polymer materials development direction. The purpose of this paper is synthesized having a novel structure of the alkali-soluble hyperbranched photosensitive silicone oligomer, the polymer combination of the characteristics of silicone, polyurethane and polyester, with a dilute alkali aqueous photosensitive, highly branched, and environmental characteristics . Study its structure the performance impact of the law to determine the structure and performance of internal relations, its application to provide the theoretical basis and technological foundation. Synthetic four alkali-soluble silicone hyperbranched polymer synthesis process and performance system. The contents are as follows: (1) the glycidyl glycerol diaminodiphenylmethane (AG-80), acrylic acid (from), hydroxyalkyl, alkyl silicone 9 Q4-3667), dimethylol propionic acid (DMPA), isophorone diisocyanate the ester (IPDI), hyperbranched polyester (HBP-OH) was synthesized from the the four kinds APSUA, AHBIPSUA, AHB2PSUAA and HB3PSUA alkali soluble silicone prepolymer, and the effects of temperature, amount of catalyst, dropping, feeding mode and amount of raw materials of the synthesis reaction. The use of IR, GPC, 1HNMR characterization of the structure of the prepolymer. The synthesis of the prepolymer has a good solubility in I% Na2C03 solution, and having a good compatibility with the acrylic acid ester monomer. The synthesis of hyperbranched prepolymer viscosity is far lower than the viscosity of the non-hyperbranched prepolymer and with the prepolymer is the degree of branching increases, the viscosity decreased from 523 MPa · s to 236 MPa · s . (2) the use of real-time infrared spectroscopy (RT-IR) to study the photo-initiator concentration, monomer species, the monomer and prepolymer species light curing system photographic performance. The results show that the The photoinitiator most suitable added in an amount of 0.05-0.07%. The double bond of the maximum rate of conversion of the light curing system is not only by the functional impact of the degree, but also by the influence of the viscosity and therefore to select the appropriate amount of the monomer in the experiment, both to ensure the system photocurable excellent performance, and to meet the viscosity requirements. The hyperbranched structure of AHB, PSUA, AHB2PSUA and AHB3PSUA of the double bonds in the largest conversion rate greater than APUSA system. (3) system of the water absorption of a cured film of the photosensitive system, the volume shrinkage ratio, chemical resistance, tensile strength, hardness, adhesion, imaging, thermal properties, and glass transition temperature and other physical and mechanical properties, and analysis of the structure relationship with performance. The results show that: the volume shrinkage rate of less than 5% of the various systems, hardness, up to 6h, and has good resistance to chemicals, and water resistance, excellent adhesion (0), the hyperbranched prepolymer Tensile strength (≥ 9.2 MPa) and elongation (≥ 129.9%) were higher than the foreign commercialization of a tensile strength of a flexible resin (5.09MPa) and stretch rate (9.48%). Has a high thermal stability, the weight loss of only 5.30% at 300 ℃ (foreign the resin OAK27 and OAK12 to 7.61% and 25.79%, respectively). All synthetic prepolymer can be a clear image, and has broad application prospects in the solder resist ink.
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