US2007286999A1PendingUtilityA1

Sizing composition for glass fibers, sized fiber glass products, and composites

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Assignee: DIJT JACOB CORNELISPriority: Jun 13, 2006Filed: Jun 13, 2006Published: Dec 13, 2007
Est. expiryJun 13, 2026(expired)· nominal 20-yr term from priority
Inventors:Jacob Cornelis DijtBartholomeus J.J. Van De HeisteegHelene A.J.M. BakkumJacobus Hendricus Antonius Van Der Woude
C08K 5/544C08K 5/205D04H 1/587C03C 25/26D04H 1/4218C09D 129/04C08L 75/04Y10T428/249924
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Claims

Abstract

The present invention relates to sizing compositions for glass fibers and glass fiber reinforced resins. In one embodiment, the present invention provides a sizing composition comprising at least one polyvinyl alcohol in an amount greater than about 65 weight percent of the sizing composition on a total solids basis, and at least one coupling agent in an amount greater than about 5 weight percent of the sizing composition on a total solids basis. Embodiments of the present invention also relate to fiber glass strands, glass fiber reinforced resin compositions, and methods for producing composites.

Claims

exact text as granted — not AI-modified
1 . An aqueous sizing composition for glass fibers, comprising:
 at least one polyvinyl alcohol in an amount greater than about 65 weight percent of the sizing composition on a total solids basis; and   at least one coupling agent in an amount greater than about 5 weight percent of the sizing composition on a total solids basis.   
   
   
       2 . The sizing composition of  claim 1 , wherein the at least one polyvinyl alcohol is present in an amount greater than about 80 weight percent of the sizing composition on a total solids basis. 
   
   
       3 . The sizing composition of  claim 1 , wherein the at least one coupling agent comprises at least one aminofunctional coupling agent. 
   
   
       4 . The sizing composition of  claim 1 , further comprising at least one lubricant. 
   
   
       5 . The sizing composition of  claim 1 , further comprising at least one polyurethane. 
   
   
       6 . The sizing composition of  claim 1 , further comprising at least one blocked isocyanate. 
   
   
       7 . The sizing composition of  claim 1 , further comprising at least one of maleic anhydride and acrylate. 
   
   
       8 . A fiber glass strand comprising at least one glass fiber at least partially coated with the sizing composition of  claim 1 . 
   
   
       9 . A glass fiber reinforced resin composition comprising:
 at least one polyamide resin; and   glass fibers at least partially coated with the residue of the sizing composition of  claim 1 .   
   
   
       10 . A method for producing a polyamide composite comprising:
 providing a plurality of glass fibers at least partially coated with the residue of the sizing composition of  claim 1 ;   incorporating the plurality of glass fibers into a polyamide resin; and   molding the polyamide resin into a composite.   
   
   
       11 . An aqueous sizing composition for glass fibers, comprising:
 at least one polyvinyl alcohol in an amount greater than about 50 weight percent of the sizing composition on a total solids basis;   at least one polyurethane; and   at least one coupling agent.   
   
   
       12 . The sizing composition of  claim 11 , wherein the at least one polyurethane is present in an amount up to about 30 weight percent of the sizing composition on a total solids basis. 
   
   
       13 . The sizing composition of  claim 11 , wherein the at least one coupling agent is present in an amount greater than about 5 weight percent of the sizing composition on a total solids basis. 
   
   
       14 . The sizing composition of  claim 11 , wherein the at least one polyvinyl alcohol is present in an amount greater than about 60 weight percent of the sizing composition on a total solids basis. 
   
   
       15 . The sizing composition of  claim 11 , wherein the at least one coupling agent comprises at least one aminofunctional coupling agent. 
   
   
       16 . The sizing composition of  claim 11 , further comprising at least one lubricant. 
   
   
       17 . The sizing composition of  claim 11 , further comprising at least one blocked isocyanate. 
   
   
       18 . The sizing composition of  claim 11 , further comprising at least one of maleic anhydride and acrylate. 
   
   
       19 . A fiber glass strand comprising at least one glass fiber at least partially coated with the sizing composition of  claim 11 . 
   
   
       20 . A glass fiber reinforced resin composition comprising:
 at least one polyamide resin; and   glass fibers at least partially coated with the residue of the sizing composition of  claim 11 .   
   
   
       21 . A method for producing a polyamide composite comprising:
 providing a plurality of glass fibers at least partially coated with the residue of the sizing composition of  claim 11 ;   incorporating the plurality of glass fibers into a polyamide resin; and   molding the polyamide resin into a composite.   
   
   
       22 . A glass fiber reinforced resin composition comprising:
 at least one polyamide resin, and   glass fibers at least partially coated with residue of a sizing composition, the sizing composition comprising at least one polyvinyl alcohol and at least one coupling agent,   
     wherein the at least one polyvinyl alcohol is present in an amount greater than about 50 weight percent of the sizing composition on a total solids basis. 
   
   
       23 . The glass fiber reinforced resin composition of  claim 22 , wherein the at least one polyvinyl alcohol is present in an amount greater than about 90 weight percent of the sizing composition on a total solids basis. 
   
   
       24 . The glass fiber reinforced resin composition of  claim 22 , wherein the sizing composition further comprises at least one polyurethane. 
   
   
       25 . The glass fiber reinforced resin composition of  claim 24 , wherein the at least one polyurethane is present in an amount up to about 30 weight percent of the sizing composition on a total solids basis. 
   
   
       26 . The glass fiber reinforced resin composition of  claim 22 , wherein the sizing composition further comprises at least one blocked isocyanate. 
   
   
       27 . The glass fiber reinforced resin composition of  claim 22 , wherein the sizing composition further comprises at least one of maleic anhydride and acrylate. 
   
   
       28 . The glass fiber reinforced resin composition of  claim 22 , wherein the polyamide resin comprises nylon 6, nylon 6:6, nylon 4:6, nylon 6:12, nylon 12, or mixtures thereof. 
   
   
       29 . An aqueous sizing composition for glass fibers, consisting essentially of:
 at least one polyvinyl alcohol;   at least one polyurethane; and   at least one aminofunctional coupling agent, wherein the sizing composition is adapted to at least partially coat glass fibers to reinforce a thermoplastic resin.   
   
   
       30 . A method for producing a polyamide composite comprising:
 providing a plurality of glass fibers at least partially coated with the residue of a sizing composition, the sizing composition comprising polyvinyl alcohol and coupling agent, the polyvinyl alcohol being present in an amount greater than about 50 weight percent of the sizing composition on a total solids basis;   incorporating the plurality of glass fibers into a polyamide resin; and   molding the polyamide resin into a composite.   
   
   
       31 . A aqueous sizing composition for glass fibers comprising:
 at least one polyvinyl alcohol in an amount greater than about 40 weight percent of the sizing composition on a total solids basis;   at least one coupling agent in an amount greater than about 5 weight percent of the sizing composition on a total solids basis; and   at least one additional component selected from the group consisting of polyurethane, blocked isocyanate, acrylate, maleic anhydride, and combinations thereof.   
   
   
       32 . The sizing composition of  claim 31 , wherein the total amount of the at least one additional component is greater than about 40 weight percent of the sizing composition on a total solids basis. 
   
   
       33 . The sizing composition of  claim 31 , wherein the total amount of the at least one additional component is greater than about 50 weight percent of the sizing composition on a total solids basis. 
   
   
       34 . The sizing composition of  claim 31 , wherein the at least one additional component comprises polyurethane and maleic anhydride.

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