Radiation curable article and method for making and using same

Patent metadata

Field	Value
Publication number	US-2017190859-A1
Application number	US-201615395381-A
Country	US
Kind code	A1
Filing date	Dec 30, 2016
Priority date	Dec 30, 2015
Publication date	Jul 6, 2017
Grant date	—

Abstract

A radiation curable article includes a silicone composition including a silicone oligomer and a photoactive catalyst, wherein the silicone oligomer comprises at least one alkenyl group and at least one hydride group, the radiation curable silicone oligomer having a viscosity of less than about 100,000 centipoise prior to cure. Further included is a method of forming a radiation curable article includes providing a silicone composition including a silicone oligomer and a photoactive catalyst, wherein the silicone oligomer includes at least one alkenyl group and at least one hydride group, the silicone oligomer having a viscosity of less than about 100,000 centipoise prior to cure; and irradiating the silicone composition with a radiation source.

First claim

What is claimed is:

1 . A radiation curable article comprising:
a silicone composition comprising a silicone oligomer and a photoactive catalyst, wherein the silicone oligomer comprises at least one alkenyl group and at least one hydride group, the radiation curable silicone oligomer having a viscosity of less than about 100,000 centipoise prior to cure.

2 . The radiation curable article of claim 1 , wherein the silicone oligomer comprises a number of R 2 SiO 2/2 (“D”) units, where R is an alkenyl group, an alkynyl group, a hydride group, an alkyl group, an alkoxy group, a phenyl group, a halogenated alkyl group, or combination thereof, the number of D units repeating from less than about 500.

3 . The radiation curable article of claim 1 , wherein the at least one hydride group and at least one alkenyl group are present in a ratio of about 1:2 to about 2:1.

4 . The radiation curable article of claim 1 , wherein the at least one hydride group is at a terminal end of the silicone oligomer and the at least one alkenyl group is at an opposite terminal end of the silicone oligomer.

5 . The radiation curable article of claim 5 , wherein at least two hydride groups are at the terminal end of the silicone oligomer and at least two alkenyl groups are at the opposite terminal end of the silicone oligomer.

6 . The radiation curable article of claim 1 , wherein the at least one hydride group of the silicone oligomer cross-links with at least one alkenyl group of a respective silicone oligomer.

7 . The radiation curable article of claim 1 , wherein the silicone oligomer is present at an amount of at least about 60 weight %, at least about 70 weight %, at least about 80 weight %, or even at least about 90 weight %, based on the total weight of the silicone composition.

8 . The radiation curable article of claim 1 , wherein the photoactive catalyst is present at an amount of greater than about 5 ppm, such as about 5 ppm to about 25 ppm, based on the total weight of the silicone composition.

9 . The radiation curable article of claim 1 , wherein the photoactive catalyst comprises a transition metal.

10 . The radiation curable article of claim 1 , wherein the silicone composition further comprises a cross-linking agent.

11 . The radiation curable article of claim 1 , wherein the article is a medical device or an adhesive.

12 . A method of forming a radiation curable article comprising:
providing a silicone composition comprising a silicone oligomer and a photoactive catalyst, wherein the silicone oligomer comprises at least one alkenyl group and at least one hydride group, the silicone oligomer having a viscosity of less than about 100,000 centipoise prior to cure; and irradiating the silicone composition with a radiation source.

13 . The method of forming the radiation curable article of claim 12 , wherein the silicone oligomer comprises a number of R 2 SiO 2/2 (“D”) units, where R is an alkenyl group, an alkynyl group, a hydride group, an alkyl group, an alkoxy group, a phenyl group, a halogenated alkyl group, or combination thereof, the number of D units repeating from less than about 500.

14 . The method of forming the radiation curable article of claim 12 , wherein the at least one hydride group and at least one alkenyl group are present in a ratio of about 1:2 to about 2:1.

15 . The method of forming the radiation curable article of claim 12 , wherein the at least one hydride group is at a terminal end of the silicone oligomer and the at least one alkenyl group is at an opposite terminal end of the silicone oligomer.

16 . The method of forming the radiation curable article of claim 12 , wherein the radiation source is ultraviolet energy with a wavelength of about 10 nanometers (nm) to about 410 nm.

17 . The method of forming the radiation curable article of claim 12 , wherein the radiation source substantially cures the silicone composition.

18 . The method of forming the radiation curable article of claim 12 , wherein providing the silicone composition comprises depositing the silicone composition upon a print region surface; and
successively depositing an additional amount of the silicone composition to form a three dimensional radiation cured article.

19 . The method of forming the radiation curable article of claim 12 , wherein providing the silicone composition comprises filling at least a portion of a container with the silicone composition and irradiating the silicone composition comprises selectively irradiating at least a portion of the silicone composition to form a three dimensional radiation cured article.

20 . A radiation curable article comprising:
a silicone composition comprising a silicone oligomer and a photoactive catalyst, wherein the silicone oligomer comprises at least one alkynyl group and at least one hydride group, the radiation curable silicone oligomer having a viscosity of less than about 100,000 centipoise prior to cure.

Assignees

• Saint Gobain Performance Plastics Corp

Inventors

• Liu Xipeng
• Tzivanis Michael J

Classifications

• B29C35/0805

  using electromagnetic radiation · CPC title

• C09J183/14

  in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms (C09J183/10 takes precedence) · CPC title

• B29C2035/0822

  using IR radiation · CPC title

• C08J2383/14

  in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms (C08J2383/10 takes precedence) · CPC title

• 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