Process for production of wood composites using mixed PMDI/solid novolac resin binder

A technology of phenyl isocyanate, compound, applied in the direction of polyurea/polyurethane adhesive, adhesive type, adhesive, etc.

Inactive Publication Date: 2002-01-09
HEXION SPECIALTY CHEM INC
View PDF45 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the excellent bonding properties of organic polyisocyanate resins also have disadvantages, that is, in continuous or intermittent hot pressing processes, compression molded products will be firmly bonded to the metal surface of the heating plate in contact

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0078] The following components were used in the examples of the invention:

[0079] Isocyanate A: Polymethylene poly(phenyl isocyanate) mixture with an NCO group content of 31.5% and a viscosity of about 200 mPa·s, commercially available from Bayer

[0080] Cascophen  SD-838A: Novolac resin, commercially available from Borden Chemical, Inc.

[0081] Varcum  29-615: Novolac resin, commercially available from Occidental Chemical, Inc. (CAS Registry Number = 40216-08-8)

[0082] Stabilizer A: Sebacic acid

[0083] The process for producing boards containing Cascophen and Varcum resins is similar, differing only in the amount of each resin (either novolac or Varcum) used in combination with the isocyanate. This process consists of two parts: the preparation of the adhesive and the production of the panels.

[0084] Adhesive preparation process

[0085]200 parts by weight of Isocyanate A and 100 parts by weight of Stabilizer A were thoroughly mixed in a 32-oz. bottle. 100...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
viscosityaaaaaaaaaa
melting pointaaaaaaaaaa
viscosityaaaaaaaaaa
Login to view more

Abstract

This invention relates to a process for the production of composite wood products. This process comprises a) applying a binder composition to wood particles, and b) molding or compressing the wood particles treated with the binder to form a composite wood product. Suitable binder compositions comprise a polymethylene poly(phenyl isocyanate) and a solid novolac resin.

Description

Background of the invention [0001] The present invention relates to a method of producing wood composites by mixing wood shavings with a mixed polymethylene poly(phenyl isocyanate) / solid novolak resin binder composition and then molding or pressing the mixed wood shavings and adhesive compositions. [0002] Composite materials such as oriented strand board, particleboard and chipboard, which are usually produced by combining lignocellulosic materials such as flakes, wood fibers, shavings, shavings, wood strands or fine wood strands, wood chips or other comminuted The lignocellulosic material is mixed with or sprayed with the binder composition while being tumbled and agitated in a mixing device or the like. After thorough mixing to form a homogeneous mixture, the material becomes a loose slab, which is pressed between heated press plates or flat plates to cure the adhesive and tightly bond the flakes, fine wood wool, wood strips, and wood chips, etc. Pick up. Traditional me...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/10B27N3/00C08G8/08C08G18/34C08G18/54C08G18/64C08G18/76C08J3/20C08L75/04C08L97/02
CPCC08L97/02C08G18/6492C08G18/7664C08G18/341C08G18/542C08L2666/14
Inventor J·W·罗斯托泽H·G·施梅策尔
Owner HEXION SPECIALTY CHEM INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap