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PU xanthochromia-resisting tripolymer curing agent formula and producing method

A production method and trimer technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of complicated production process methods, high production costs, large equipment investment, etc. Gloss, increase compatibility, increase the effect of yellowing resistance

Inactive Publication Date: 2016-09-21
YELE XINXIANG CHEM IND MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the anti-yellowing trimer curing agent on the market is mainly synthesized by methyl diisocyanate and hexamethylene diisocyanate under the action of additives, and then the unreacted free monomer is evaporated by a thin film evaporator. This production process is cumbersome. , high production cost, large investment in equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Example 1, Step 1: Add ethyl acetate, 1.5% antioxidant, 475% BASF toluene diisocyanate, and 10% dodecyl alcohol to the reactor in sequence, and then heat up to 70°C to 75°C. ℃ and heat preservation; Step 2: Add ethyl acetate with a weight ratio of 200 into the reactor, and after the temperature in the reactor drops to 65°C, add an initiator with a mass ratio of 0.2 and a catalyst with a mass ratio of 1.6 and dilute with ethyl acetate Stir the mixed solvent evenly, keep it warm for 1.5-2 hours and detect the percentage value of NCO group content. Step 3: When monitoring the content of NCO groups to be 8.5%-8.7%, immediately add terminator phosphoric acid with a weight ratio of 0.6 diluted with butyl acetate and stir the mixed solvent in the reactor when adding, and the stirring time is long In 0.5 hours; Step 4: Add butyl acetate with a mass ratio of 100 and an ultraviolet absorber UV of 0.3, and stir evenly. Add butyl acetate, 50% base material, and 35% HDI trimer in s...

Embodiment 2

[0013] Embodiment two, PU anti-yellowing trimer curing agent formula and production method, comprise the following steps: Step 1: in reaction kettle, add the ethyl acetate of 209.6, the antioxidant of 1.5, the BASF of 475 successively in weight ratio respectively Mix toluene diisocyanate and 10% dodecyl alcohol, heat up to 70°C to 75°C and keep warm; Step 2: Add ethyl acetate with a weight ratio of 200 into the reactor, and wait until the temperature in the reactor drops to 65°C Add an initiator with a mass ratio of 0.2 and a catalyst with a mass ratio of 1.6 and mix well with the mixed solvent diluted with ethyl acetate, keep it warm for 1.5-2 hours and detect the percentage value of the NCO group content, and the holding temperature value is 65°C to 70°C , during the heat preservation stage, adding ethyl acetate with a weight ratio of 2 and a catalyst with a weight ratio of 0.2 is placed in the reactor and stirred evenly to continue the heat preservation; Step 3: When the con...

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PUM

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Abstract

The invention discloses a PU xanthochromia-resisting tripolymer curing agent formula and a producing method, and belongs to the technical field of coating production. According to the PU xanthochromia-resisting tripolymer curing agent, a tripolymer is firstly synthesized through methyl diisocyanate under the action of auxiliaries of ethyl acetate, antioxygen, an initiator, a catalyst, a terminating agent phosphoric acid and an ultraviolet absorbent UV-2 dodecanol, then hexamethylene diisocyanate and the tripolymer are mixed up, and the PU xanthochromia-resisting tripolymer curing agent is prepared. The gloss of the tripolymer in paint can be improved, xanthochromia resistance can be improved, the intermiscibility resin in the paint can be improved, the xanthochromia-resisting time can reach 1-3 years compared with a product in the prior art, the intermiscibility of the curing agent and resin in bright paint can reach 3:1, use and popularization are convenient, and the market prospects are wide.

Description

technical field [0001] The invention relates to a curing agent used in coatings, adhesives and elastomers and a preparation method thereof, in particular to a formulation and a production method of a PU anti-yellowing trimer curing agent. Background technique [0002] Polyurethane (PU) is a new organic polymer material, which is widely used in automobile manufacturing, refrigerator manufacturing, transportation, civil engineering, footwear, synthetic leather, fabrics, electromechanical, petrochemical, mining, etc. due to its excellent performance. Machinery, aviation, medical treatment, agriculture and many other fields. Due to its strong water resistance, the polyurethane series has certain applicability in UV light curing, powder and other aspects. It is a long-term application material and has a good development prospect. [0003] At present, the anti-yellowing trimer curing agent on the market is mainly synthesized by methyl diisocyanate and hexamethylene diisocyanate u...

Claims

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Application Information

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IPC IPC(8): C08G18/79C09D175/04C09J175/04C08L75/04
CPCC08G18/794C08L75/04C09D175/04C09J175/04
Inventor 李小伍
Owner YELE XINXIANG CHEM IND MFG CO LTD
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