News Details
Water based wood coating crosslinking agent
2017-5-31 17:14:41
Water based wood coating crosslinking agent
Varieties of waterborne wood coatings are mainly on the market at present water-borne alkyd resin, water-borne polyacrylate, water-based acrylic polyurethane, one-component, or two-component waterborne polyurethane coatings, etc.
Acrylate emulsion coating has good light color retention, permanent, hardness, resistance to pollution, such as performance, and have price advantage than polyurethane coating, therefore has become one of the fastest growing varieties of paint.
But due to the formula introduced a number of hydrophilic group, and makes the poor water resistance of waterborne polyacrylate coating, and coating is mainly composed of thermoplastic resin, there is a severe high temperature viscosity and low temperature brittle problem back, can't satisfy the doors and Windows, floors and other wood production and processing enterprises need for rapid, efficient production methods.
Therefore, without a significant increase in the cost of polyacrylate emulsion wood paint and retain their price advantage under the premise of how to effectively improve the polyacrylate emulsion coating of high temperature viscosity and low temperature brittle back problems, to adapt to the production enterprise demand for high temperature and high pressure fast mode of production, is an urgent need to solve the problem.
While improve the glass transition temperature can be in a certain extent, ease the paint film of the high temperature viscosity, but it also can produce emulsion film-forming temperature is high, the film brittle big problem.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants.
According to the design and principle of molecular design the structure of the latex particles, core-shell emulsion polymerization process, diacetone acrylamide (DAAM) as crosslinking monomer, introducing chemical properties on polyacrylate macromolecular chain lively ketone carbonyl, room temperature and adipic hydrazine (ADH) in connecting branches emulsion film-forming epigenetic structure as a result of reaction, and through the core-shell structure design and control for the amount of crosslinking monomer and join methods, was synthesized with hardcore soft shell structure, the minimum film-forming temperature (MFT) is not higher than 45 ℃, under high temperature is not sticky, can be used in wood coatings self-crosslinking polyacrylate emulsion, thus for the development of high performance of water-borne polyacrylate emulsion wood paint explored a new process and technology.
Experiment materials: acrylic acid (AA), methyl methacrylate (MMA), styrene (St), butyl acrylate (BA) and N - methylol acrylamide (N - MA), diacetone acrylamide (DAAM), adipic hydrazine (ADH) : are industrial products, without purification used directly; Composite emulsifier: anionic emulsifier sodium dodecyl sulfate and nonionic emulsifier OP - 10 to the quality than the mixture of 2:1, without purification used directly; Sodium protective polymethyl methacrylate: industrial grade; Ammonium sulphate, sodium bicarbonate and ammonia: both industrial and unpurified. Deionized water: homemade.
The preparation of self-crosslinking nuclear shell polyacrylate emulsion. Will be mixed monomer (main monomer MMA 45% ~ 65%, St 30% ~ 50%, BA 0 ~ 20%; functional monomer AA, N - MA, DAAM right amount, both for mass fraction), part of deionized water and emulsifier strong stirring at room temperature, pre emulsified around 15 min was A pre emulsified monomers; Equipped with A thermometer, mixer, reflux condenser pipe and constant pressure drop funnel four flask with deionized water, protecting glue, sodium bicarbonate, and about 10% of A pre emulsified monomers, stirring edge to join part of ammonium persulfate initiator solution, at the same time, higher reaction temperature (75 + 1) ℃, 15 min insulation aggregate, slowly add the rest of the pre emulsified monomers and initiator solution, A control acceleration within 2 h drops out; Heat preservation polymerization 30 min after receiving nuclear emulsion, for use.
Preparation of nuclear shell emulsion. Will be mixed monomer (main monomer MMA 25% ~ 45%, St 10% ~ 25%, BA 30 ~ 50%; functional monomer AA, N - MA, DAAM right amount, both for mass fraction), part of deionized water and emulsifier strong stirring at room temperature, emulsion was prepared beforehand emulsified monomers B; Will slowly drop pre emulsified monomers and initiator B solution to the nuclear emulsion, control and time within 2 h, heat preservation after 1 h, cooled to about 50 ℃, strong stirring and under the condition of a certain concentration of ammonia solution, the adjusting system of the pH value of 7.5; Cool to room temperature, join measurement of ADH aqueous solution, after blending 120 mesh sieve filtration material, can get the solid content is 45%, room temperature can be crosslinked core-shell type polyacrylate emulsion.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Varieties of waterborne wood coatings are mainly on the market at present water-borne alkyd resin, water-borne polyacrylate, water-based acrylic polyurethane, one-component, or two-component waterborne polyurethane coatings, etc.
Acrylate emulsion coating has good light color retention, permanent, hardness, resistance to pollution, such as performance, and have price advantage than polyurethane coating, therefore has become one of the fastest growing varieties of paint.
But due to the formula introduced a number of hydrophilic group, and makes the poor water resistance of waterborne polyacrylate coating, and coating is mainly composed of thermoplastic resin, there is a severe high temperature viscosity and low temperature brittle problem back, can't satisfy the doors and Windows, floors and other wood production and processing enterprises need for rapid, efficient production methods.
Therefore, without a significant increase in the cost of polyacrylate emulsion wood paint and retain their price advantage under the premise of how to effectively improve the polyacrylate emulsion coating of high temperature viscosity and low temperature brittle back problems, to adapt to the production enterprise demand for high temperature and high pressure fast mode of production, is an urgent need to solve the problem.
While improve the glass transition temperature can be in a certain extent, ease the paint film of the high temperature viscosity, but it also can produce emulsion film-forming temperature is high, the film brittle big problem.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants.
According to the design and principle of molecular design the structure of the latex particles, core-shell emulsion polymerization process, diacetone acrylamide (DAAM) as crosslinking monomer, introducing chemical properties on polyacrylate macromolecular chain lively ketone carbonyl, room temperature and adipic hydrazine (ADH) in connecting branches emulsion film-forming epigenetic structure as a result of reaction, and through the core-shell structure design and control for the amount of crosslinking monomer and join methods, was synthesized with hardcore soft shell structure, the minimum film-forming temperature (MFT) is not higher than 45 ℃, under high temperature is not sticky, can be used in wood coatings self-crosslinking polyacrylate emulsion, thus for the development of high performance of water-borne polyacrylate emulsion wood paint explored a new process and technology.
Experiment materials: acrylic acid (AA), methyl methacrylate (MMA), styrene (St), butyl acrylate (BA) and N - methylol acrylamide (N - MA), diacetone acrylamide (DAAM), adipic hydrazine (ADH) : are industrial products, without purification used directly; Composite emulsifier: anionic emulsifier sodium dodecyl sulfate and nonionic emulsifier OP - 10 to the quality than the mixture of 2:1, without purification used directly; Sodium protective polymethyl methacrylate: industrial grade; Ammonium sulphate, sodium bicarbonate and ammonia: both industrial and unpurified. Deionized water: homemade.
The preparation of self-crosslinking nuclear shell polyacrylate emulsion. Will be mixed monomer (main monomer MMA 45% ~ 65%, St 30% ~ 50%, BA 0 ~ 20%; functional monomer AA, N - MA, DAAM right amount, both for mass fraction), part of deionized water and emulsifier strong stirring at room temperature, pre emulsified around 15 min was A pre emulsified monomers; Equipped with A thermometer, mixer, reflux condenser pipe and constant pressure drop funnel four flask with deionized water, protecting glue, sodium bicarbonate, and about 10% of A pre emulsified monomers, stirring edge to join part of ammonium persulfate initiator solution, at the same time, higher reaction temperature (75 + 1) ℃, 15 min insulation aggregate, slowly add the rest of the pre emulsified monomers and initiator solution, A control acceleration within 2 h drops out; Heat preservation polymerization 30 min after receiving nuclear emulsion, for use.
Preparation of nuclear shell emulsion. Will be mixed monomer (main monomer MMA 25% ~ 45%, St 10% ~ 25%, BA 30 ~ 50%; functional monomer AA, N - MA, DAAM right amount, both for mass fraction), part of deionized water and emulsifier strong stirring at room temperature, emulsion was prepared beforehand emulsified monomers B; Will slowly drop pre emulsified monomers and initiator B solution to the nuclear emulsion, control and time within 2 h, heat preservation after 1 h, cooled to about 50 ℃, strong stirring and under the condition of a certain concentration of ammonia solution, the adjusting system of the pH value of 7.5; Cool to room temperature, join measurement of ADH aqueous solution, after blending 120 mesh sieve filtration material, can get the solid content is 45%, room temperature can be crosslinked core-shell type polyacrylate emulsion.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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