Mold release agent

Patent metadata

Field	Value
Publication number	US-10113084-B2
Application number	US-201514686318-A
Country	US
Kind code	B2
Filing date	Apr 14, 2015
Priority date	May 22, 2014
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A mold release composition is provided contains a minimum of three reactive moieties per molecule to provide for both mold adhesion and crosslink density. The composition is soluble in a VOC-free organic solvent or water, alone or with resort to an emulsifier. The composition can be used as a semi-permanent mold release in some embodiments.

First claim

The invention claimed is:

1. A mold release coating on a mold surface, the mold release coating being derived from a polysiloxane having the formula of formula 1:

where y≥3 and x is ≥0, where a reactive moiety for the purposes of the present invention include those moieties that react on the mold surface to form bonds to other polymers of Formula (I), the mold surface, or both, where reactive moieties comprise one or more of R 4 , R 5 , R 6 , or R 7 , where R 4 , R 5 , R 6 , or R 7 are the same or different and each is independently one or more of reactive moieties of glycydoxy, C 1 -C 8 alkoxy, C 1 -C 8 alkoxy having a substituent, or independently one or more of unreactive moieties C 1 -C 8 or longer alkyl, either branched or unbranched; and where R 1 R 2 , R 3 , R 8 , R 9 , and R 10 can be the same or different and each independently is a saturated C 1 -C 8 or greater alkyl, either linear or branched with the proviso any hydrogen present in the R groups is non-labile; and
the mold surface being an inflatable elastomeric bladder surface, the polysiloxane bonded to the rubber bladder surface by reaction of the one or more reactive moieties.

2. The coating of claim 1 wherein said reactive moieties include at least three reactive moieties.

3. The coating of claim 1 wherein said reactive moieties are all pendant.

4. The coating of claim 1 wherein all of said reactive moieties are like moieties.

Assignees

• Illinois Tool Works

Inventors

• Khourshid Tysir
• Moon Douglas E

Classifications

• B29K2083/00

  Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material · CPC title

• C09D183/06 Primary

  containing silicon bound to oxygen-containing groups (C09D183/12 takes precedence) · CPC title

• B29D2030/0655

  Constructional or chemical features of the flexible cores · CPC title

• B29C33/64 Primary

  Silicone · CPC title

• B29L2009/005

  coated · CPC title