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Polymeric diluents for structural adhesives

A polymer and adhesive technology, applied in the direction of polymer adhesive additives, adhesive types, adhesive additives, etc., can solve problems such as short working hours

Inactive Publication Date: 2010-02-24
ROHM & HAAS CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, the short working time of this adhesive composition limits it when it is applied to large area substrates to form bonded structural laminates

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0051] Active Hot Melt Components

[0052] Use a reactive hot melt adhesive (Mor-Melt TM R-5022, Pennsylvania, USA, Philadelphia, Rohm and Haas Company) as a reference sample.

[0053] Polymeric, moisture-reactive compositions (MRC) as reactive diluents

[0054] Uncatalyzed, polymeric, liquid, moisture-reactive compositions (PMRCs) were prepared.

[0055] PMRC1

[0056] Component Weight %

[0057] Rubinate M TM ,

[0058] Lupranate M-

[0059] 20S TM ,or

[0060] Mondur MR TM

[0061] (light) 28.70

[0062] MDI 11.68

[0063] Luprinate

[0064] MI TM 1.24

[0065] P-2010 TM 58.3

[0066] Foamblast TM

[0067] 20F 0.006

[0068] BC 0.033

[0069] Blamkopher

[0070] SOL TM 0.02

[0071] Total weight 100

[0072] MDI: Diphenylmethane diisocyanate, a mixture of isomers (i.e. 2,4'-MDI and 4,4'-MDI).

[0073] PMRC2

[0074] Component Weight %

[0075] Rubinate M TM ,

[0076] Lupranate M-

[0077] 20S TM , or Mondur ...

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PUM

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Abstract

The invention is directed to low molecular weight, polymeric moisture reactive compositions that function as useful polymeric reactive diluents for structural adhesives, including but not limited to reactive hot melts, to extend the working time of the structural adhesives without adversely affecting creep.

Description

technical field [0001] The present invention relates to alternative compositions for reactive diluents for structural adhesives, including reactive hot melt adhesives. More specifically, the present invention relates to extending the working time of structural adhesives, including , but not limited to reactive hot melt adhesives. Background technique [0002] Structural adhesives such as reactive hot melts are limited by their working time, green strength and creep rate when producing bonded laminates. Small molecular weight organic compounds, including VOCs, known as reactive diluents, are used to extend the working time of structural adhesives by keeping them fluid. Conventional reactive diluents have many limitations, namely they are not only physiologically harmful, but also have a unique characteristic unpleasant taste and odor. The degree of crosslinking achievable in such reactive diluents is only approximately less than 90%, which necessarily precludes their use t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J11/08C09J175/04B32B37/12
CPCC08L75/04C08G18/12C09J175/04C08G2170/20C08L2666/20C08G18/307
Inventor J·L·里查德
Owner ROHM & HAAS CO
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