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(METH)acrylic oligomers

An acrylic, oligomer technology, used in ester copolymer adhesives, carboxylate preparation, preparation of organic compounds, etc.

Pending Publication Date: 2019-04-16
SYNTHOMER ADHESIVE TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is difficult because these types of monomers and polymerization methods tend to produce high molecular weight products

Method used

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  • (METH)acrylic oligomers
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  • (METH)acrylic oligomers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] A 1500 mL glass reactor equipped with a heating jacket, stirrer, reflux condenser, feed vessel and nitrogen inlet was charged with 800 g of tert-butyl methacrylate. Next, 160 mg of the cobaloxime catalyst prepared as described above was dissolved in 20 g of ethyl acetate, filtered, and the liquid was added to the reactor. Next, 130 grams of ethyl acetate and 50 grams of acetone were also charged to the reactor, stirring was started, and the total mixture was heated to reflux conditions of about 85°C. An initiator solution consisting of 0.8 grams of 2,2'-azobis(isobutyronitrile) (AIBN) dissolved in 30 grams of ethyl acetate was prepared and added to the reactor over approximately 20 minutes. The reaction mixture was maintained at about 80-87°C for about 2 hours and another initiator solution consisting of 0.8 grams of AIBN and 30.0 grams of ethyl acetate was added over about 20 minutes.

[0079] The reaction was maintained at about 80-85°C for an additional 2 hours and ...

Embodiment 2 to 28

[0081] Several additional disclosed oligomers were prepared in a manner similar to that described in Example 1 above. The only difference between the procedure for preparing the disclosed oligomers in Examples 2-28 and the procedure for preparing the disclosed oligomers in Example 1 is the concentration of cobaloxime (ppm by weight of monomer) and / or Starting monomer composition. Example 11 was synthesized from a different batch of catalyst with increased activity leading to the desired M z Less catalyst is required.

[0082] The molecular weight and polydispersity index of each oligomer prepared in Examples 2-28 were measured and the results are summarized in Table 2 below. In addition, the ring and ball softening points of several oligomers prepared in Examples 2-28 were measured and these values ​​are also provided in Table 2. The oligomer samples prepared in Examples 2-10 were combined with the pressure sensitive adhesive (PSA 1 ) described in Examples 29-39 below.

[...

Embodiment 29 to 39

[0086] by charging 55.0 g of ethyl acetate, 82.3 g of 2-ethylhexyl acrylate, and 4.33 g of acrylic acid into a 1000-mL glass reactor equipped with a heating jacket, stirrer, reflux condenser, feed vessel, and nitrogen inlet. Prepare a model solution acrylic pressure-sensitive adhesive composition (PSA 1). The resulting mixture was then stirred and heated to a reflux temperature of approximately 80°C. An initiator solution was prepared by dissolving 0.17 grams of lauroyl peroxide in 5.0 grams of toluene and charged to the reactor. In a separate feed vessel, 247.0 grams of 2-ethylhexyl acrylate, 13.0 grams of acrylic acid, 260 grams of ethyl acetate, and 0.17 grams of lauroyl peroxide were mixed and fed into the reactor over 2 hours while the temperature was maintained at A reflux temperature of about 80°C. After the feeds, the reaction was maintained at a reflux temperature of approximately 80°C. In a separate feed vessel, 0.7 grams of lauroyl peroxide was dissolved in 70.0 ...

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Abstract

The invention provides (meth)acrylic oligomers prepared from C1-C20 alkyl and C5-C20 cycloalkyl (meth)acrylates, wherein said oligomers have a Mn of about 300 g / mole to about 3,000 g / mole; a Mw of about 700 g / mole to about 6,000 g / mole; a Mz of about 900 g / mole to about 10,000 g / mole. The oligomers may have a Yellowness Index, according to ASTM E313 of less than 2. The oligomers of the invention are useful as tackifiers in adhesive compositions, but also are believed to be useful also in general polymer modification as plasticizers, leveling agents, viscosity reducers (i.e., rheology modifiers), and for increasing solids content in solvent-borne applications of all types with little detrimental impact on viscosity. The invention also provides adhesive compositions and laminate articles coated on at least one side with the adhesive compositions of the invention.

Description

[0001] Cross References to Related Applications [0002] This PCT application claims the benefit of U.S. Provisional Patent Application Serial No. 62 / 358,693, filed July 6, 2016, the entire disclosure of which is hereby incorporated by reference. field of invention [0003] The present invention relates to the field of adhesives. In particular, the present invention relates to oligomeric (meth)acrylic materials useful as tackifiers in adhesives, sealants, and other elastomeric compositions. Background of the invention [0004] The options for tackifying more polar adhesive systems are limited. In addition, there is little or no tackifier present that is water white and provides excellent oxidation, heat and UV resistance. The benefits of tackifying resins for adhesives are as follows: improved solids content or lower melt viscosity, which leads to processing benefits such as faster line speeds, defect-free coatings and the ability to coat thick films. Another benefit is i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/06C08F120/14C08F120/18C08F120/20C07C67/00C08F2/38C08F8/04
CPCC07C67/00C08F2/38C08F8/04C09J133/10C08F20/14C08F20/18C08F220/1808C08F220/1804C08F220/06C07C67/465C07C69/54C09J133/08C08F120/14C08F120/18C08F120/20C09J133/06
Inventor C.L.莱斯特S.E.格茨T.H.布莱尼G.R.阿什利M.S.帕夫林D.G.阿特金斯刘铸舫
Owner SYNTHOMER ADHESIVE TECH LLC
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