Invention Grant
- Patent Title: Phenol-formaldehyde novolac resin having low concentration of free phenol
- Patent Title (中): 具有低浓度游离酚的酚醛酚醛清漆树脂
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Application No.: US11747343Application Date: 2007-05-11
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Publication No.: US09458349B2Publication Date: 2016-10-04
- Inventor: Richard Rediger , Edward Lucas
- Applicant: Richard Rediger , Edward Lucas
- Applicant Address: US GA Atlanta
- Assignee: Georgia-Pacific Chemicals LLC
- Current Assignee: Georgia-Pacific Chemicals LLC
- Current Assignee Address: US GA Atlanta
- Agent Ram W. Sabnis
- Main IPC: C09D161/00
- IPC: C09D161/00 ; C09D161/06 ; B22C1/22 ; C08G8/10 ; C08L59/00 ; C09D159/00
Abstract:
A phenol-formaldehyde novolac resin having a low concentration of free phenol prepared by distilling residual phenol from a molten novolac resin and replacing at least a portion of the phenol with a solvent having a volatility equal to or less than phenol. Such modified novolac resins are suitable for the production of resin coated molding sands for shell molding and sand cores, as well as for the production of resin coated proppants for use in oil and gas recovery operations.
Public/Granted literature
- US20080280787A1 PHENOL-FORMALDEHYDE NOVOLAC RESIN HAVING LOW CONCENTRATION OF FREE PHENOL Public/Granted day:2008-11-13
Information query
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