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Allophanate-modified stabilizers and the polymer polyols prepared from these stabilizers

A technology of allophanate and polyol, applied in the field of ethylenically unsaturated macromonomer

Inactive Publication Date: 2008-07-23
BAYER MATERIALSCIENCE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although many macromers and preformed stabilizers are known, no macromers and preformed stabilizers prepared from allophanate-modified diisocyanates containing ethylenically unsaturated groups have been previously reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0054] 合适的制备预形成稳定剂的方法类似于美国专利4,148,840、4,242,249、4,954,561、4,745,153、5,494,957、5,990,185、6,455,603、4,327,005、4,334,049、4,997,857、5,196,476、5,268,418、5,854,386、5,990,232、6,013,731、5,554,662、5,594,066、5,814,699和5,854,358 Known methods described in , the contents of these patents are incorporated herein by reference. In general, the method of making preformed stabilizers is similar to that of making polymer polyols. The temperature range is not critical and may be about 80-150°C or higher, preferably about 115-125°C. The catalyst and temperature should be chosen such that the catalyst has a reasonable rate of decomposition relative to the residence time in the reactor for a continuous flow reactor or the feed time for a semi-batch reactor.

[0055] The mixing conditions used in this process are achieved using a back-mixing reactor such as a stirred flask or a stirred autoclave. This type of reactor makes the reaction mixture more homogeneous and thus prevents locally high monome...

Embodiment 1

[0099] Example 1 : Allophanate-modified isocyanate containing active unsaturated groups

[0100] To a mixture of isocyanate A (3000 g) and 1,4-benzoquinone (2.4 g) was added HEMA (480 g) at 60°C under nitrogen. The solution was heated at 60°C for 75 minutes. Then, ZnAcAc (0.5 g) was added, and the reaction solution was heated at 90° C. for 75 minutes. After cooling to 60° C., benzoyl chloride (1.0 g) was added to give a storage-stable yellow liquid with an NCO content of about 20.0%.

Embodiment 2

[0101] Example 2 : Macromonomer A

[0102] Under nitrogen, polyol A (3500 grams) and BQ (1.8 grams) were added to a 5 liter flask. The allophanate-modified isocyanate of Example 1 (157 grams) was added via an addition funnel, keeping the temperature below 70°C. The mixture was stirred at 70°C for 2 hours to give a pale yellow product with an OH value of about 26.7.

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Abstract

The present invention relates to allophanate-modified stabilizers and polymer polyols prepared from these stabilizers. In particular, the present invention relates to novel ethylenically unsaturated macromers, preformed stabilizers prepared from these novel macromers, stabilized from these novel ethylenically unsaturated macromers or preformed Polymer polyols prepared by agents and methods of making these compositions.

Description

technical field [0001] The present invention relates to ethylenically unsaturated macromonomers prepared from allophanate-modified isocyanates containing reactive unsaturated groups, preformed stable macromers prepared from these novel ethylenically unsaturated macromers Agents, polymer polyols prepared from these macromers and preformed stabilizers, and methods of making these compositions. Background technique [0002] Allophanate-modified diphenylmethane diisocyanates and their prepolymers are known and described, for example, in US Pat. US Patent 5319053 discloses a process for the preparation of stable liquid allophanate-modified MDI isocyanates and prepolymers of these allophanate-modified MDI isocyanates. The method comprises reacting a specific MDI isomer composition with an aliphatic alcohol containing 1-36 carbon atoms to obtain an allophanate-modified MDI with an NCO group content of 12-32.5%. [0003] Various allophanate-modified MDI and its prepolymers and oth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/72C08G18/48C08G18/62C08F220/44C08F212/08C08F2/38
CPCC08G18/485C08G18/4883C08G18/672C08G18/7657C08G18/7837C08G18/8175C08G18/48C08G18/16C08G18/40C08G18/78
Inventor R·L·阿德金斯
Owner BAYER MATERIALSCIENCE AG
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