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Photocurable polysiloxane polyurethane (meth)acrylate composition, adhesive and cured product

A polysiloxane polyurethane, acrylate technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of high volume shrinkage, easy peeling, etc., and achieve the best penetration , The effect of resistance to strong light exposure is not easy

Active Publication Date: 2016-08-24
DAXIN MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the radiation curable composition can form a cured product with a tensile breaking length of 1200%, however, the radiation curable composition has the problem of excessive volume shrinkage, so that the cured product formed by it, after thermal shock Easy to have the problem of peeling

Method used

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  • Photocurable polysiloxane polyurethane (meth)acrylate composition, adhesive and cured product
  • Photocurable polysiloxane polyurethane (meth)acrylate composition, adhesive and cured product
  • Photocurable polysiloxane polyurethane (meth)acrylate composition, adhesive and cured product

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0070] [Synthesis Example 1] Synthesis of polysiloxane urethane (meth)acrylate (A1)

[0071] Place 11.11 grams (0.05 moles) of IPDI, 40 grams (0.04 moles) of X-22-160AS, 9.2 grams of lauryl acrylate and 0.05 grams of DBTDL in a 600-milliliter round-bottomed bottle, and continue at 40°C under a nitrogen atmosphere. Stir the reaction for 1.5 hours, then add 0.03 grams of MEHQ and 1.17 grams (0.0101 moles) of β-hydroxyethyl methacrylate, and react at 65 ° C for 4 hours to obtain polysiloxane polyurethane methacrylate , the viscosity is 25441mpas, and the weight average molecular weight is 20001.

[0072] [Synthesis Examples 2 to 3]

[0073] The polysiloxane urethane (meth)acrylates of Synthesis Example 2 and Synthesis Example 3 were prepared in the same manner as in Synthesis Example 1, wherein the types and amounts of each component are shown in Table 1.

Embodiment 1

[0074] [Example 1] Preparation of photocurable polysiloxane polyurethane (meth)acrylate composition

[0075] Stir and mix 81 grams of polysiloxane urethane methacrylate of Synthesis Example 1, 17.9 grams of lauryl acrylate, 0.4 grams of I819 and 0.7 grams of TMMP at 25° C. After machine defoaming, the photocurable polysiloxane polyurethane (meth)acrylate composition can be obtained. Various property tests were carried out, and the test results are shown in Table 2.

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Abstract

A photocurable polysiloxane polyurethane (meth)acrylate composition includes polysiloxane polyurethane (meth)acrylate, a compound containing ethylenically unsaturated functional groups, a photoinitiator and a thiol compound. The polysiloxane polyurethane (meth)acrylate includes a polymerization product prepared by a polymerization reaction of a reactant, which has a weight average molecular weight range of less than 5,000, a dihydroxy-containing polysiloxane polymer, and a dihydroxy-containing polysiloxane polymer. An isocyanate compound and a hydroxyl-containing (meth)acrylate compound, and the molar ratio of the amount of the diisocyanate compound to the amount of the dihydroxy-containing polysiloxane polymer is 1.05 to 1.45. The cured product formed from the composition has a tensile breaking length of greater than 680% and a volume shrinkage of less than 1.95%.

Description

technical field [0001] The present invention relates to a photocurable adhesive composition, in particular to a photocurable polysiloxane polyurethane (meth)acrylate containing the photocurable polysiloxane polyurethane (meth)acrylate and a thiol compound. ) acrylate compositions. Background technique [0002] Currently, in display devices, adhesives are used to paste transparent cover lenses made of glass, acrylic resin plates, polycarbonate plates, and touch panels, or touch panels and display components. . Adhesives can generally be divided into heat-curable adhesives and light-curable adhesives. Among them, light-curable adhesives require less curing time than heat-curable adhesives, and are suitable for use in production lines. [0003] US Patent No. 6265476 discloses a radiation-curable composition. In the specific example of its description, it is stated that the radiation curable composition comprises urethane acrylate oligomer, nitrogen-vinylformamide (N-vinylfor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/14C08G18/67C08G18/61
Inventor 钟显政李宛谕
Owner DAXIN MATERIALS