Sulfur modified polyvinyl acetate (PVAc)

Patent metadata

Field	Value
Publication number	US-9243167-B2
Application number	US-201313761479-A
Country	US
Kind code	B2
Filing date	Feb 7, 2013
Priority date	Feb 7, 2012
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

Abstract

Provided are a sulfur modified polymer composition, free from asphalt, bitumen or like compounds, and method of making same. The inclusion of 50% by weight sulfur, or greater, into the polymer composition results in a composition that is softer and having an increased melting point, relative to the unmodified polymer composition.

First claim

What is claimed is:

1. A sulfur modified polyvinyl acetate polymer composition, the polymer composition comprising:
a polyvinyl acetate polymer having a melting point of less than 140° C.; and
sulfur, wherein the sulfur is present in a range of 65.8% to 73% by weight, based on the weight of the polymer, such that the sulfur modified polymer has an increased melting point as compared to the melting point of the unmodified polyvinyl acetate polymer.

2. The polymer composition of claim 1 , wherein the composition does not contain asphalt, bitumen, and combinations thereof.

3. The polymer composition of claim 1 wherein at least a portion of the sulfur is present in elemental form.

4. The polymer composition of claim 1 wherein the sulfur modified polyvinyl acetate polymer composition has a melting point that is up to 50° C. greater than the melting point of the unmodified polyvinyl acetate polymer.

5. The polymer composition of claim 1 wherein the sulfur modified polyvinyl acetate polymer composition has a melting point that is between 10° C. and 50° C. greater than the melting point of the unmodified polyvinyl acetate polymer.

6. The polymer composition of claim 1 wherein the sulfur modified polyvinyl acetate polymer composition has a melting point that is between 10° C. and 30° C. greater than the melting point of the unmodified polyvinyl acetate polymer.

7. The polymer composition of claim 1 , wherein the sulfur modified polyvinyl acetate polymer composition has a melting point that is between 20° C. and 40° C. greater than the melting point of the unmodified polyvinyl acetate polymer.

8. The polymer composition of claim 1 , wherein the sulfur modified polyvinyl acetate polymer composition has a melting point that is between 30° C. and 50° C. greater than the melting point of the unmodified polyvinyl acetate polymer.

9. The polymer composition of claim 1 , wherein the polyvinyl acetate polymer has a molecular weight of between 10,000 and 25,000.

10. The polymer composition of claim 1 , wherein the polyvinyl acetate polymer has a molecular weight of between 25,000 and 75,000.

11. The polymer composition of claim 1 , wherein the polyvinyl acetate polymer has a molecular weight of between 75,000 and 125,000.

Assignees

• Saudi Arabian Oil Co
• Univ King Fahd Pet & Minerals

Inventors

• Hussein Ibnelwaleed A
• Al-Mehthel Mohammed H
• Al-Abdul Wahhab Hamad I
• Al-Idi Saleh H
• Suleiman Mohammed A

Classifications

• C08L95/00

  Compositions of bituminous materials, e.g. asphalt, tar, pitch · CPC title

• E01C23/06

  Devices or arrangements for working the finished surface (working freshly laid paving E01C19/42 - E01C19/44, E01C23/02; mining picks E21C35/18); Devices for repairing {or reconditioning} the surface of damaged paving; {Recycling in place or on the road} · CPC title

• C08F8/34

  Introducing sulfur atoms or sulfur-containing groups · CPC title

• C08K3/30

  Sulfur-, selenium- or tellurium-containing compounds · CPC title

• C09D195/00 Primary

  Coating compositions based on bituminous materials, e.g. asphalt, tar, pitch · CPC title